Merge pull request #77: fix: escalate the symptom phrasing people actually use, and never clear a reported symptom (#21)

Deterministic escalation only fired on a narrow set of literal phrases, so real reports
like "there is blood when I wipe" or "I have tarry stools" reached the chat provider
without the fixed medical guidance. Expanding the suite found 18 of 18 checked clinical
phrasings missing.

- domain: cover bleeding reported by wiping/toilet paper/anatomy/mixed-in phrasing,
  black-tarry-dark-red stool, reported temperature and high temperature, abdominal-scoped
  severe pain in every natural word order, and past-tense/slang inability to pass gas.
  Near-miss wording that must stay quiet (paper cut, blood pressure, black beans, dark red
  wine, a normal temperature, knee or back pain, passed gas, no gas in the car) is pinned.
- domain: a symptom reported in any truthy shape (1, "yes", "true") now counts as reported.
  Reading only the literal boolean `true` silently cleared a symptom, which is the one
  direction this boundary may never fail in.
- hermes-agent-service: the gateway ledger sanitizer used the same strict check, so a
  browser-supplied ledger entry could have its symptom cleared before the escalation check.
- tests/escalation-regression.test.js: per-flag positive and negative language coverage,
  model output can neither set nor clear a symptom/urgency/discomfort/note, and the
  escalation copy is byte-identical for every flag and under a missing, throwing, or
  malicious provider. Registered in the default unit gate.
- scripts/record_release_demo.mjs: the recording now types the new bleeding and tarry
  phrasing, and seeds a fictional ledger whose note says "stool was tarry yesterday", then
  asserts in the browser that exactly one new Timmy bubble carries the app's own copy and
  that the turn never reaches Hermes. Three new captions are required release gates.

Boundary unchanged: no new inference, no diagnosis, no image claim. Escalation only ever
gets broader on user-reported symptoms.

.dockerignore

@@ -0,0 +1,12 @@
+# The worker image is built from source; weights, releases, and private data never enter it.
+.git/
+node_modules/
+models/
+*.gguf
+artifacts/
+video/
+research/source-pages/
+__pycache__/
+*.pyc
+.env
+.env.*

.gitea/workflows/quality.yml

@@ -50,7 +50,14 @@ jobs:
           done
           npm run test:ui
           npm run test:photo
+          npm run test:mobile-capture
           npm run test:sleek
+          npm run test:manual-fallback
+          npm run test:provisional
+          npm run test:followup
+          npm run test:vision-refusal
+          npm run test:worker-readiness
+          npm run test:pattern-summary
       - name: Dependency audit
         run: npm audit --audit-level=high
       - name: Syntax checks

PRODUCT.md

@@ -29,6 +29,7 @@ Most stool trackers are sterile diaries. Most AI-health demos overclaim. Timmy c
 - Smart free-text chat with local fallback and an optional fully tool-capable Hermes backend behind exact-origin authentication.
 - Portable JSON export and delete-all control.
 - A Timmy voice that is playful about logging and serious about red flags.
+- A short user-reported follow-up after a hard/lumpy (Bristol 1–2) log: difficulty passing, soreness, visible blood, truly black/tarry versus dark brown, and hydration. Mild reports receive proportionate non-diagnostic self-care; a confirmed red flag routes into the existing deterministic escalation, and dark brown is never silently escalated as black stool.
 
 ## Honest AI boundary
 

README.md

@@ -96,6 +96,8 @@ npm test
 npm run test:ui       # server required on port 4173
 npm run test:photo    # mocked positive suggestion through the real browser UX
 npm run test:sleek   # simplified 390x844 shell + free-text Hermes chat
+npm run test:manual-fallback  # vision-offline manual path + in-session draft recovery
+npm run test:vision-refusal   # corpus refusals through a real server and a real browser
 npm audit --audit-level=high
 ```
 
@@ -112,7 +114,12 @@ npm audit --audit-level=high
 - Free-text smart chat with real server-side Hermes session continuity and local fallback
 - Authenticated, same-origin, bounded browser-to-agent gateway with no browser-side credentials
 - Red-flag symptom escalation
+- A short user-reported follow-up after a hard/lumpy (Bristol 1–2) log — difficulty passing, soreness, visible blood, truly black/tarry versus dark brown, and hydration. Mild reports get concise non-diagnostic self-care that never claims a photo ruled out bleeding; a confirmed red flag sets the same deterministic escalation the manual checkboxes use
+- Manual fallback that never depends on AI: when the vision worker is offline or disabled, no AI or consent control is offered and manual Bristol entry stays one action away
+- A committed CC0 synthetic vision corpus that continuously proves every reply is schema-valid or fails closed. A schema-valid reply with no readable form or colour now **abstains** ("No confident match") instead of surfacing as a worker failure, and unparsable or out-of-range replies return plain copy — "No suggestion was applied. Continue manually, or try a clearer photo." — with no provider text, image bytes, or credentials echoed. See [tests/fixtures/vision-corpus](tests/fixtures/vision-corpus/README.md)
+- Unsaved logging drafts are retained in the session with an explicit start over, and the service worker never caches analysis requests or image bodies
 - Local browser ledger, calendar, pattern summary, JSON portability, and delete-all
+- Explainable pattern summaries: the home insight card reports the confirmed-log count and form groupings for the last 28 days, every line names the exact confirmed records behind it, following a citation opens those records, and a window below the minimum says it is too sparse instead of describing a trend. No line explains a cause, rules on food, or offers a health verdict
 - Installable/offline PWA shell for the manual and saved-ledger paths
 
 ## What is deliberately not faked

app.js

@@ -1,5 +1,10 @@
 import { bucketForBristolType, buildTimmySummary, detectUrgentFlags, detectUrgentText, exportLedger, hasUrgentLedgerContext, importLedger, photoQualityMessage, sanitizeEntry, urgentChatMessage } from './src/domain.js';
 import { mergeVisualSuggestion } from './src/analysis.js';
+import { createDraft, draftNotice, isDraftDirty } from './src/draft.js';
+import { changeVisualField, confirmSuggestion, createSuggestionState, provenanceCopy } from './src/suggestion.js';
+import { HARD_STOOL_QUESTIONS, createFollowUpAnswers, evaluateHardStoolFollowUp, needsHardStoolFollowUp } from './src/followup.js';
+import { visionReadiness } from './src/vision-readiness.js';
+import { buildPatternSummary } from './src/summary.js';
 
 const runtimeConfig = {
   basePath: document.querySelector('meta[name="timmy-base-path"]')?.content || '/',
@@ -22,17 +27,59 @@ if (BASE_PATH === '/') {
 const app = document.querySelector('#app');
 let entries = loadEntries();
 let view = 'home';
-let photoDataUrl = '';
 let photoHint = '';
 let aiSuggestion = null;
+let suggestionState = createSuggestionState(null);
 let visionStatus = null;
 let photoFirstMode = 'pick';
 let agentStatus = null;
 let chatBusy = false;
 let chatError = '';
 let chatMessages = [{ role: 'timmy', text: 'Ask me about your confirmed logs, visible patterns, privacy, or how Timmy works.' }];
-const draft = () => ({ bristolType: 4, color: 'brown', urgency: 0, discomfort: 0, note: '', symptoms: {} });
-let form = draft();
+let draftResumed = false;
+let form = createDraft();
+let followUpAnswers = createFollowUpAnswers();
+
+function draftBanner(){
+  if(!draftResumed||!isDraftDirty(form))return '';
+  return `<div class="draft-resume"><span role="status">Draft kept in this session: <strong>${esc(draftNotice(form))}</strong></span><button class="text-action compact" id="discard-draft">Start over</button></div>`;
+}
+function beginDraft(){draftResumed=isDraftDirty(form);if(!draftResumed)form=createDraft()}
+function clearDraft(){form=createDraft();draftResumed=false;suggestionState=createSuggestionState(null);followUpAnswers=createFollowUpAnswers()}
+function resetSuggestion(){aiSuggestion=null;suggestionState=createSuggestionState(null)}
+// A single place where provisional, confirmed, and corrected AI states become visible copy.
+function provenanceBlock(){
+  const copy=provenanceCopy(suggestionState,form);
+  if(!copy.label)return '';
+  return `<div class="ai-prefill ai-provenance" data-provenance="${copy.status}" aria-label="${esc(copy.aria)}"><span class="ai-badge">${esc(copy.label)}</span><strong>Type ${form.bristolType} · ${esc(form.color)}</strong><small>You’re in charge—tap any type to correct it.</small><p class="provenance-note fine" role="status">${esc(copy.detail)}</p></div>`;
+}
+function refreshProvenance(){const copy=provenanceCopy(suggestionState,form);document.querySelectorAll('.provenance-note').forEach(node=>{node.textContent=copy.detail||''});const container=document.querySelector('.ai-provenance');if(container&&copy.aria)container.setAttribute('aria-label',copy.aria)}
+
+// Hard-stool follow-up (field finding #67). After a Type 1-2 entry Timmy asks a short
+// user-reported follow-up: soreness, difficulty passing, hydration, and black/tarry
+// character are never inferred from pixels. A confirmed red-flag answer writes the same
+// symptom flag the rest of the app already escalates on, so the safety path stays one path.
+function followUpState(){return {...followUpAnswers}}
+function syncFollowUpFlags(){for(const question of HARD_STOOL_QUESTIONS){if(!question.urgentFlag)continue;const box=document.querySelector(`[data-symptom="${question.urgentFlag}"]`);if(box)box.checked=form.symptoms[question.urgentFlag]===true}}
+function followUpOutput(verdict){
+  if(verdict.urgent)return `<div id="followup-guidance" class="followup-guidance escalated" role="status"><strong>That answer sets the red-flag check below.</strong><p class="fine">Timmy is not diagnosing you here. The answer you gave is what triggers this, and the check below is the same one manual logging uses.</p></div>`;
+  if(!verdict.answered)return '<p class="fine" id="followup-guidance" role="status">Answer what applies. Anything you skip stays unanswered, and none of it is guessed from your photo.</p>';
+  return `<div id="followup-guidance" class="followup-guidance" role="status"><strong>Mild report — general self-care, not a diagnosis.</strong><ul>${verdict.guidance.map(line=>`<li>${esc(line)}</li>`).join('')}</ul><p class="fine">${esc(verdict.note)}</p><p class="fine">${esc(verdict.seekCare)}</p></div>`;
+}
+function followUpBlock(){
+  if(!needsHardStoolFollowUp(form))return '';
+  const state=followUpState();
+  const rows=HARD_STOOL_QUESTIONS.map(question=>`<div class="followup-row" data-question="${question.id}"><span>${esc(question.label)}${question.urgentFlag?'<small class="followup-map">Also sets the red-flag check below.</small>':''}</span><div class="followup-toggle"><button type="button" data-followup="${question.id}" data-answer="yes" class="${state[question.id]===true?'selected':''}" aria-pressed="${state[question.id]===true}">Yes</button><button type="button" data-followup="${question.id}" data-answer="no" class="${state[question.id]===false?'selected':''}" aria-pressed="${state[question.id]===false}">No</button></div></div>`).join('');
+  return `<section class="followup" data-followup-block aria-label="Hard stool follow-up questions"><h3>Type ${form.bristolType} — a few quick questions</h3><p class="fine">Timmy never guesses these from your photo. You report them, and you can skip any of them.</p>${rows}<div id="followup-output">${followUpOutput(evaluateHardStoolFollowUp(state))}</div></section>`;
+}
+function refreshFollowUp(){
+  const state=followUpState();
+  if(document.querySelector('[data-followup-block]')){
+    document.querySelectorAll('[data-followup]').forEach(button=>{const selected=state[button.dataset.followup]===(button.dataset.answer==='yes');button.classList.toggle('selected',selected);button.setAttribute('aria-pressed',String(selected))});
+    const output=document.querySelector('#followup-output');if(output)output.innerHTML=followUpOutput(evaluateHardStoolFollowUp(state));
+  }
+  const urgent=detectUrgentFlags(form.symptoms);const box=document.querySelector('#urgent-box');if(box)box.innerHTML=urgent.urgent?alertHtml(urgent.message):'';
+}
 
 function esc(value='') { return String(value).replace(/[&<>'"]/g, c => ({'&':'&amp;','<':'&lt;','>':'&gt;',"'":'&#39;','"':'&quot;'}[c])); }
 function loadEntries() { try { return JSON.parse(localStorage.getItem(STORE) || '[]'); } catch { return []; } }
@@ -50,6 +97,7 @@ function bindGlobal(){
   document.querySelectorAll('[data-view]').forEach(btn=>btn.onclick=()=>{view=btn.dataset.view;render()});
   document.querySelectorAll('[data-log]').forEach(btn=>btn.onclick=openLogger);
   document.querySelectorAll('[data-scan]').forEach(btn=>btn.onclick=openPhotoFirst);
+  document.querySelectorAll('[data-statement-link]').forEach(btn=>btn.onclick=()=>showPatternRecords(btn.dataset.statementLink));
 }
 
 function recentList(limit=5){
@@ -59,9 +107,35 @@ function recentList(limit=5){
 function thisWeek(){const now=Date.now(),week=7*864e5;return entries.filter(e=>now-new Date(e.occurredAt).getTime()<week).length}
 function currentStreak(){const dates=new Set(entries.map(e=>e.occurredAt.slice(0,10)));let n=0,d=new Date();while(dates.has(d.toISOString().slice(0,10))){n++;d.setDate(d.getDate()-1)}return n}
 
+// Issue #34: the home insight card is explainable. Every line says which confirmed records it was
+// built from, following a citation shows exactly those records, and a sparse window says so
+// instead of describing a trend the data cannot support.
+function patternSummaryCard(){
+  const summary=buildPatternSummary(entries);
+  const logs=`${summary.records.length} confirmed log${summary.records.length===1?'':'s'}`;
+  const lines=summary.insufficient
+    ? `<p class="fine" data-summary-insufficient>${esc(summary.copy)}</p>`
+    : `<ul class="pattern-statements">${summary.statements.map(statement=>`<li data-statement="${statement.id}" data-records="${statement.entryIds.length}">${esc(statement.text)} <button class="pattern-link" data-statement-link="${statement.id}">${statement.entryIds.length} record${statement.entryIds.length===1?'':'s'} ›</button></li>`).join('')}</ul>`;
+  return `<section class="section"><div class="insight-card pattern-card" data-pattern-summary role="group" aria-label="Explainable pattern summary"><div class="timmy-orb"><img src="${appPath('assets/timmy.svg')}" alt=""></div><div><span class="eyebrow">Timmy noticed</span><p class="pattern-window" data-summary-window>${esc(summary.window.label)} · ${logs}</p>${lines}<p class="fine pattern-boundary">${esc(summary.boundary)}</p></div></div></section>`;
+}
+function showPatternRecords(statementId){
+  const summary=buildPatternSummary(entries);
+  const statement=summary.statements.find(item=>item.id===statementId);
+  if(!statement)return;
+  const byId=new Map(summary.records.map(record=>[record.id,record]));
+  const rows=statement.entryIds.map(id=>byId.get(id)).filter(Boolean)
+    .map(record=>`<article class="entry" data-summary-record data-entry-id="${esc(record.id)}"><div class="type-dot">T${record.bristolType}</div><div><strong>${formatDate(record.occurredAt)}</strong><span>Type ${record.bristolType} · ${esc(record.bucket)}</span></div></article>`).join('');
+  document.querySelector('.sheet-backdrop')?.remove();
+  const wrap=document.createElement('div');wrap.className='sheet-backdrop';
+  wrap.innerHTML=`<section class="sheet" role="dialog" aria-modal="true" aria-labelledby="pattern-records-title"><div class="sheet-handle"></div><div class="sheet-header"><div><span class="eyebrow">Pattern source</span><h2 id="pattern-records-title">${esc(statement.text)}</h2></div><button class="icon-btn" id="pattern-records-close" aria-label="Close">×</button></div><div data-summary-records><p class="fine">These are the confirmed logs this line was built from.</p><div class="entries-card">${rows}</div><p class="fine">Window: ${esc(summary.window.label)}. Change or delete any of these logs and this line changes with them.</p></div></section>`;
+  document.body.append(wrap);
+  document.querySelector('#pattern-records-close').onclick=()=>wrap.remove();
+  wrap.onclick=e=>{if(e.target===wrap)wrap.remove()};
+}
+
 function home(){
   const latest=entries.slice().sort((a,b)=>new Date(b.occurredAt)-new Date(a.occurredAt))[0];
-  shell(`<main class="home-main"><section class="hero sleek-hero"><span class="eyebrow">Your intelligent pooping pal</span><h1>Log it.<br>Learn the pattern.</h1><p class="lead">Start with a photo. Timmy suggests visible form and color; you review everything before it is saved.</p><button class="capture-cta btn-primary" data-scan><span class="capture-icon" aria-hidden="true">◉</span><span><strong>Start photo log</strong><small>Private, guided, about 10 seconds</small></span><i aria-hidden="true">→</i></button><button class="text-action" data-log>Log manually instead</button></section><section class="glance" aria-label="Journal at a glance"><div><strong>${thisWeek()}</strong><span>this week</span></div><i></i><div><strong>${currentStreak()}</strong><span>day streak</span></div><i></i><div><strong>${entries.length}</strong><span>all logs</span></div></section><section class="section"><div class="insight-card"><div class="timmy-orb"><img src="${appPath('assets/timmy.svg')}" alt=""></div><div><span class="eyebrow">Timmy noticed</span><p>${esc(buildTimmySummary(entries))}</p></div></div></section><section class="section recent-section"><div class="section-head"><div><span class="eyebrow">Latest</span><h2>${latest?'Recent log':'Ready when you are'}</h2></div>${latest?'<button class="text-action compact" data-view="calendar">View journal</button>':''}</div>${latest?`<div class="latest-card"><div class="type-dot">T${latest.bristolType}</div><div><strong>${formatDate(latest.occurredAt)}</strong><span>${esc(latest.color)} · ${bucketForBristolType(latest.bristolType)}</span></div><span class="chevron">›</span></div>`:'<p class="fine">One quick, confirmed entry is enough to begin seeing your pattern.</p>'}</section></main>`);
+  shell(`<main class="home-main"><section class="hero sleek-hero"><span class="eyebrow">Your intelligent pooping pal</span><h1>Log it.<br>Learn the pattern.</h1><p class="lead">Start with a photo. Timmy suggests visible form and color; you review everything before it is saved.</p><button class="capture-cta btn-primary" data-scan><span class="capture-icon" aria-hidden="true">◉</span><span><strong>Start photo log</strong><small>Private, guided, about 10 seconds</small></span><i aria-hidden="true">→</i></button><button class="text-action" data-log>Log manually instead</button></section><section class="glance" aria-label="Journal at a glance"><div><strong>${thisWeek()}</strong><span>this week</span></div><i></i><div><strong>${currentStreak()}</strong><span>day streak</span></div><i></i><div><strong>${entries.length}</strong><span>all logs</span></div></section>${patternSummaryCard()}<section class="section recent-section"><div class="section-head"><div><span class="eyebrow">Latest</span><h2>${latest?'Recent log':'Ready when you are'}</h2></div>${latest?'<button class="text-action compact" data-view="calendar">View journal</button>':''}</div>${latest?`<div class="latest-card"><div class="type-dot">T${latest.bristolType}</div><div><strong>${formatDate(latest.occurredAt)}</strong><span>${esc(latest.color)} · ${bucketForBristolType(latest.bristolType)}</span></div><span class="chevron">›</span></div>`:'<p class="fine">One quick, confirmed entry is enough to begin seeing your pattern.</p>'}</section></main>`);
 }
 
 function calendar(){
@@ -122,7 +196,7 @@ function exportData(){const blob=new Blob([exportLedger(entries)],{type:'applica
 async function importData(e){try{const text=await e.target.files[0].text();entries=importLedger(text);saveEntries();render();toast('Ledger imported')}catch(err){toast(err.message)}}
 function deleteData(){if(confirm('Delete every local Timmy entry and photo? This cannot be undone.')){entries=[];localStorage.removeItem(STORE);localStorage.removeItem(LEGACY_STORE);render();toast('Local ledger deleted')}}
 
-function openPhotoFirst(){form=draft();photoDataUrl='';photoHint='';aiSuggestion=null;visionStatus=null;showPhotoFirst('pick');loadVisionStatus()}
+function openPhotoFirst(){beginDraft();photoHint='';resetSuggestion();visionStatus=null;showPhotoFirst('pick');loadVisionStatus()}
 async function loadVisionStatus(){
  try{const response=await fetch(appPath('api/vision-status'),{headers:{accept:'application/json'}});visionStatus=response.ok?await response.json():{enabled:false,providerReady:false}}
  catch{visionStatus={enabled:false,providerReady:false}}
@@ -130,50 +204,54 @@ async function loadVisionStatus(){
 }
 function visionStatusHtml(){
  if(!visionStatus)return '<div class="model-status checking">◌ Checking the vision worker…</div>';
+ // Reachable is not loaded (#15): a worker answering before its pinned model is loaded must not be
+ // shown as ready, because the AI controls are withheld until the model can actually answer.
+ if(visionStatus.providerReady&&visionStatus.modelSeen!==true)return '<div class="model-status loading">◌ Vision worker up · the model is not loaded yet · manual logging is available</div>';
  if(visionStatus.profile==='selfhost'&&visionStatus.providerReady)return `<div class="model-status ready">● Self-hosted model ready · ${esc(visionStatus.model)}</div>`;
  if(visionStatus.providerReady)return `<div class="model-status ready">● Vision provider ready · ${esc(visionStatus.model)}</div>`;
  return '<div class="model-status offline">○ Vision worker offline · manual logging is still available</div>';
 }
 function photoFirstBody(mode,error=''){
- if(mode==='pick')return `${visionStatusHtml()}<div class="scan-hero"><img src="${appPath('assets/timmy.svg')}" alt="Timmy"><h3>One photo. Two useful suggestions.</h3><p>Timmy can suggest the visible Bristol form and color. A camera cannot know urgency, pain, symptoms, or a diagnosis.</p></div><label class="photo-capture" for="ai-photo"><b>📷</b><strong>Take or choose a photo</strong><span>JPEG, PNG, or WebP · compressed before analysis</span><input id="ai-photo" type="file" accept="image/*" capture="environment"></label><button class="btn btn-ghost btn-wide section" id="manual-from-scan">Continue without AI</button>`;
- if(mode==='ready'){const processingCopy=visionStatus?.profile==='selfhost'?'Timmy’s server does not save it. The compressed copy stays on Timmy’s self-hosted model server.':'Timmy’s server does not save it. Your configured AI provider processes it under that provider’s terms.';return `${visionStatusHtml()}<img class="photo-preview scan-preview" src="${photoDataUrl}" alt="Photo awaiting AI analysis"><p class="quality-note">${esc(photoHint)}</p><div class="consent-card"><label class="check"><input id="ai-consent" type="checkbox"><span><strong>Send this compressed copy for one-time AI analysis.</strong><br>${processingCopy}</span></label></div><button class="btn btn-primary btn-wide" id="analyze-photo" disabled>Analyze visible form + color</button><button class="btn btn-ghost btn-wide section" id="retake-photo">Use another photo</button>`;}
+ if(mode==='pick')return `${visionStatusHtml()}<div class="scan-hero"><img src="${appPath('assets/timmy.svg')}" alt="Timmy"><h3>One photo. Two useful suggestions.</h3><p>Timmy can suggest the visible Bristol form and color. A camera cannot know urgency, pain, symptoms, or a diagnosis.</p></div>${error?`<p class="capture-status" role="status">${esc(error)}</p>`:''}<div class="capture-choice-grid"><label class="photo-capture" for="camera-photo"><b>📷</b><strong>Take photo</strong><span>Use the rear camera</span><input id="camera-photo" type="file" accept="image/*" capture="environment"></label><label class="photo-capture" for="gallery-photo"><b>▧</b><strong>Choose from gallery</strong><span>JPEG, PNG, or WebP</span><input id="gallery-photo" type="file" accept="image/*"></label></div><button class="btn btn-ghost btn-wide section" id="manual-from-scan">Continue without AI</button>`;
+ if(mode==='ready'){const readiness=visionReadiness(visionStatus);if(!readiness.ready)return `${visionStatusHtml()}<img class="photo-preview scan-preview" src="${form.photoDataUrl}" alt="Photo kept on this device"><p class="quality-note">${esc(photoHint)}</p><p class="fine">${esc(readiness.message)} Nothing is uploaded, and this photo stays on this device until you save the entry.</p><button class="btn btn-primary btn-wide" id="manual-from-scan">${esc(readiness.manualLabel)}</button><button class="btn btn-ghost btn-wide section" id="retake-photo">Use another photo</button>`;const processingCopy=visionStatus?.profile==='selfhost'?'Timmy’s server does not save it. The compressed copy stays on Timmy’s self-hosted model server.':'Timmy’s server does not save it. Your configured AI provider processes it under that provider’s terms.';return `${visionStatusHtml()}<img class="photo-preview scan-preview" src="${form.photoDataUrl}" alt="Photo awaiting AI analysis"><p class="quality-note">${esc(photoHint)}</p><div class="consent-card"><label class="check"><input id="ai-consent" type="checkbox"><span><strong>Send this compressed copy for one-time AI analysis.</strong><br>${processingCopy}</span></label></div><button class="btn btn-primary btn-wide" id="analyze-photo" disabled>Analyze visible form + color</button><button class="btn btn-ghost btn-wide section" id="retake-photo">Use another photo</button>`;}
  if(mode==='analyzing')return `<div class="analyzing"><img src="${appPath('assets/timmy.svg')}" alt="Timmy"><div class="spinner" aria-hidden="true"></div><h3>Timmy is looking at form and color…</h3><p>Not symptoms. Not disease. Not whether Taco Bell was a strategic error.</p></div>`;
  if(mode==='error')return `<div class="scan-result needs-input"><b>↻</b><h3>Timmy couldn’t analyze that safely.</h3><p>${esc(error||'Continue manually or try a clearer photo.')}</p></div><button class="btn btn-primary btn-wide" id="manual-from-scan">Fill it out manually</button><button class="btn btn-ghost btn-wide section" id="retake-photo">Try another photo</button>`;
- if(aiSuggestion?.status==='suggestion')return `<div class="scan-result"><span class="ai-badge">AI SUGGESTION · ${Math.round(aiSuggestion.confidence*100)}% CONFIDENCE</span><div class="suggestion-pair"><div><small>BRISTOL FORM</small><strong>Type ${aiSuggestion.bristolType}</strong></div><div><small>VISIBLE COLOR</small><strong>${esc(aiSuggestion.color)}</strong></div></div><p>${esc(aiSuggestion.observations||'Visual match found.')}</p><p class="fine">${esc(aiSuggestion.warning)}</p></div><button class="btn btn-primary btn-wide" id="use-suggestion">Use these suggestions</button><button class="btn btn-ghost btn-wide section" id="manual-from-scan">Review everything manually</button>`;
+ if(suggestionState.status==='pending'){const copy=provenanceCopy(suggestionState,form);return `<div class="scan-result provisional" data-provenance="${copy.status}" aria-label="${esc(copy.aria)}"><span class="ai-badge">${esc(copy.label)} · ${Math.round(suggestionState.suggestion.confidence*100)}% CONFIDENCE</span><div class="suggestion-pair"><div><small>BRISTOL FORM</small><strong>Type ${suggestionState.suggestion.bristolType}</strong></div><div><small>VISIBLE COLOR</small><strong>${esc(suggestionState.suggestion.color)}</strong></div></div><p>${esc(aiSuggestion.observations||'Visual match found.')}</p><p class="provenance-note" role="status">${esc(copy.detail)}</p><p class="fine">${esc(aiSuggestion.warning)}</p></div><button class="btn btn-primary btn-wide" id="use-suggestion">Use these suggestions</button><button class="btn btn-ghost btn-wide section" id="manual-from-scan">Review everything manually</button>`;}
  return `<div class="scan-result needs-input"><b>?</b><h3>No confident match.</h3><p>${esc(aiSuggestion?.reason||'The image was too uncertain to prefill safely.')}</p></div><button class="btn btn-primary btn-wide" id="manual-from-scan">Choose the form yourself</button><button class="btn btn-ghost btn-wide section" id="retake-photo">Try another photo</button>`;
 }
 function showPhotoFirst(mode='pick',error=''){
  photoFirstMode=mode;
  document.querySelector('.sheet-backdrop')?.remove();const wrap=document.createElement('div');wrap.className='sheet-backdrop';wrap.innerHTML=`<section class="sheet scan-sheet" role="dialog" aria-modal="true" aria-labelledby="scan-title"><div class="sheet-handle"></div><div class="sheet-header"><div><span class="eyebrow">Photo-first log</span><h2 id="scan-title">${mode==='result'?'Review Timmy’s suggestion':mode==='analyzing'?'Analyzing privately':'Start with the camera'}</h2></div><button class="icon-btn" id="close-sheet" aria-label="Close">×</button></div>${photoFirstBody(mode,error)}</section>`;document.body.append(wrap);document.querySelector('#close-sheet').onclick=()=>wrap.remove();wrap.onclick=e=>{if(e.target===wrap)wrap.remove()};
- const file=document.querySelector('#ai-photo');if(file)file.onchange=handleAiPhoto;
- const consent=document.querySelector('#ai-consent'),analyze=document.querySelector('#analyze-photo');if(consent&&analyze)consent.onchange=()=>analyze.disabled=!consent.checked||visionStatus?.providerReady===false;if(analyze)analyze.onclick=runAiAnalysis;
- document.querySelector('#retake-photo')?.addEventListener('click',()=>{photoDataUrl='';photoHint='';aiSuggestion=null;showPhotoFirst('pick')});
- document.querySelector('#manual-from-scan')?.addEventListener('click',()=>{aiSuggestion=null;showLogStep(1)});
- document.querySelector('#use-suggestion')?.addEventListener('click',()=>{form=mergeVisualSuggestion(form,aiSuggestion);showLogStep(1)});
+ document.querySelectorAll('#camera-photo,#gallery-photo').forEach(file=>{file.onchange=handleAiPhoto;file.addEventListener('cancel',()=>showPhotoFirst('pick','Camera or photo picker closed. If permission was denied, allow camera access in browser settings, choose from the gallery, or continue without AI.'))});
+ const consent=document.querySelector('#ai-consent'),analyze=document.querySelector('#analyze-photo');if(consent&&analyze)consent.onchange=()=>analyze.disabled=!consent.checked||!visionReadiness(visionStatus).ready;if(analyze)analyze.onclick=runAiAnalysis;
+ document.querySelector('#retake-photo')?.addEventListener('click',()=>{form.photoDataUrl='';photoHint='';resetSuggestion();showPhotoFirst('pick')});
+ document.querySelector('#manual-from-scan')?.addEventListener('click',()=>{resetSuggestion();showLogStep(1)});
+ document.querySelector('#use-suggestion')?.addEventListener('click',()=>{suggestionState=confirmSuggestion(suggestionState);form=mergeVisualSuggestion(form,aiSuggestion);form.typeChosen=true;showLogStep(1)});
 }
-async function handleAiPhoto(e){const file=e.target.files[0];if(!file)return;try{const result=await compressPhoto(file);photoDataUrl=result.dataUrl;photoHint=photoQualityMessage(result);showPhotoFirst('ready')}catch{showPhotoFirst('error','That image could not be read. Try another photo.')}}
-async function runAiAnalysis(){showPhotoFirst('analyzing');try{const response=await fetch(appPath('api/analyze'),{method:'POST',headers:{'content-type':'application/json'},body:JSON.stringify({imageDataUrl:photoDataUrl,consent:true})});const data=await response.json();if(!response.ok)throw new Error(data.error||'AI analysis is unavailable.');aiSuggestion=data;showPhotoFirst('result')}catch(error){showPhotoFirst('error',error.message||'AI analysis is unavailable. Continue manually.')}}
+async function handleAiPhoto(e){const file=e.target.files[0];if(!file)return;try{const result=await compressPhoto(file);form.photoDataUrl=result.dataUrl;photoHint=photoQualityMessage(result);showPhotoFirst('ready')}catch{showPhotoFirst('error','That image could not be read. Try another photo.')}}
+async function runAiAnalysis(){showPhotoFirst('analyzing');try{const response=await fetch(appPath('api/analyze'),{method:'POST',headers:{'content-type':'application/json'},body:JSON.stringify({imageDataUrl:form.photoDataUrl,consent:true})});const data=await response.json();if(!response.ok)throw new Error(data.error||'AI analysis is unavailable.');aiSuggestion=data;suggestionState=createSuggestionState(data);showPhotoFirst('result')}catch(error){showPhotoFirst('error',error.message||'AI analysis is unavailable. Continue manually.')}}
 
-function openLogger(){form=draft();photoDataUrl='';photoHint='';aiSuggestion=null;showLogStep(1)}
+function openLogger(){beginDraft();photoHint='';resetSuggestion();showLogStep(1)}
 function showLogStep(step){
   document.querySelector('.sheet-backdrop')?.remove();
-  const wrap=document.createElement('div');wrap.className='sheet-backdrop';wrap.innerHTML=`<section class="sheet" role="dialog" aria-modal="true" aria-labelledby="log-title"><div class="sheet-handle"></div><div class="sheet-header"><div><span class="eyebrow">Step ${step} of 3</span><h2 id="log-title">${step===1?'Pick the closest form':step===2?'Add useful context':'Safety check'}</h2></div><button class="icon-btn" id="close-sheet" aria-label="Close">×</button></div><div class="progress"><i class="progress-step-${step}"></i></div>${stepBody(step)}</section>`;document.body.append(wrap);
+  const wrap=document.createElement('div');wrap.className='sheet-backdrop';wrap.innerHTML=`<section class="sheet" role="dialog" aria-modal="true" aria-labelledby="log-title"><div class="sheet-handle"></div><div class="sheet-header"><div><span class="eyebrow">Step ${step} of 3</span><h2 id="log-title">${step===1?'Pick the closest form':step===2?'Add useful context':'Safety check'}</h2></div><button class="icon-btn" id="close-sheet" aria-label="Close">×</button></div><div class="progress"><i class="progress-step-${step}"></i></div>${draftBanner()}${stepBody(step)}</section>`;document.body.append(wrap);
   document.querySelector('#close-sheet').onclick=()=>wrap.remove();wrap.onclick=e=>{if(e.target===wrap)wrap.remove()};bindStep(step);
 }
 function stepBody(step){
- if(step===1)return `${aiSuggestion?.status==='suggestion'?`<div class="ai-prefill"><span class="ai-badge">AI PREFILLED</span><strong>Type ${aiSuggestion.bristolType} · ${esc(aiSuggestion.color)}</strong><small>You’re in charge—tap any type to correct it.</small></div>`:'<p class="fine">Choose the closest match yourself. Timmy never treats a suggestion as fact.</p>'}<div class="choice-grid">${[[1,'Hard separate lumps'],[2,'Lumpy sausage'],[3,'Cracked sausage'],[4,'Smooth and soft'],[5,'Soft blobs'],[6,'Mushy pieces'],[7,'Entirely liquid']].map(([n,d])=>`<button class="bristol ${form.bristolType===n?'selected':''}" data-type="${n}"><strong>Type ${n}</strong><span>${d}</span></button>`).join('')}</div><button class="btn btn-primary btn-wide section" id="next">Confirm + add details →</button>`;
- if(step===2)return `<label class="field"><span class="field-label">Color</span><select class="input" id="color"><option>brown</option><option>green</option><option>yellow</option><option>pale</option><option>red</option><option>black</option></select></label><label class="field"><span class="field-label">Urgency</span><div class="range-row"><input id="urgency" type="range" min="0" max="4" value="${form.urgency}"><output class="range-val">${form.urgency}</output></div></label><label class="field"><span class="field-label">Discomfort</span><div class="range-row"><input id="discomfort" type="range" min="0" max="4" value="${form.discomfort}"><output class="range-val">${form.discomfort}</output></div></label><label class="field"><span class="field-label">Note (optional)</span><textarea class="input" id="note" maxlength="500" placeholder="Meal, medicine, travel, stress…">${esc(form.note)}</textarea></label><label class="photo-drop btn" for="photo">📷 Add a private photo (optional)<input id="photo" type="file" accept="image/*" capture="environment"></label>${photoDataUrl?`<img class="photo-preview" src="${photoDataUrl}" alt="Private entry preview">`:''}${photoHint?`<p class="fine">${esc(photoHint)}</p>`:''}${aiSuggestion?.status==='suggestion'?'<p class="fine">AI suggested only form and visible color. Urgency, discomfort, notes, and symptoms must come from you.</p>':'<p class="fine">Manual-mode photos stay in this browser and receive quality checks only.</p>'}<div class="row section"><button class="btn btn-ghost" id="back">← Back</button><button class="btn btn-primary" id="next">Safety check →</button></div>`;
- const urgent=detectUrgentFlags(form.symptoms);return `<p class="fine">Select anything you have now. This is where Timmy stops joking.</p><div class="symptoms">${[['blood','Blood in stool or rectal bleeding'],['blackOrDarkRed','Black or dark-red stool'],['severePain','Severe or constant abdominal pain'],['vomiting','Vomiting'],['fever','Fever'],['cannotPassGas','Unable to pass gas']].map(([k,l])=>`<label class="check"><input type="checkbox" data-symptom="${k}" ${form.symptoms[k]?'checked':''}><span>${l}</span></label>`).join('')}</div><div id="urgent-box">${urgent.urgent?alertHtml(urgent.message):''}</div><div class="row section"><button class="btn btn-ghost" id="back">← Back</button><button class="btn btn-primary" id="save">Save private log</button></div><p class="fine">Not medical advice. Heavy or nonstop bleeding, fainting, or severe worsening symptoms can be an emergency—call local emergency services.</p>`;
+ if(step===1)return `${provenanceBlock()||'<p class="fine">Choose the closest match yourself. Timmy never treats a suggestion as fact.</p>'}<div class="choice-grid">${[[1,'Hard separate lumps'],[2,'Lumpy sausage'],[3,'Cracked sausage'],[4,'Smooth and soft'],[5,'Soft blobs'],[6,'Mushy pieces'],[7,'Entirely liquid']].map(([n,d])=>`<button class="bristol ${form.bristolType===n?'selected':''}" data-type="${n}"><strong>Type ${n}</strong><span>${d}</span></button>`).join('')}</div><button class="btn btn-primary btn-wide section" id="next">Confirm + add details →</button>`;
+ if(step===2)return `<label class="field"><span class="field-label">Color</span><select class="input" id="color"><option>brown</option><option>green</option><option>yellow</option><option>pale</option><option>red</option><option>black</option></select></label><label class="field"><span class="field-label">Urgency</span><div class="range-row"><input id="urgency" type="range" min="0" max="4" value="${form.urgency}"><output class="range-val">${form.urgency}</output></div></label><label class="field"><span class="field-label">Discomfort</span><div class="range-row"><input id="discomfort" type="range" min="0" max="4" value="${form.discomfort}"><output class="range-val">${form.discomfort}</output></div></label><label class="field"><span class="field-label">Note (optional)</span><textarea class="input" id="note" maxlength="500" placeholder="Meal, medicine, travel, stress…">${esc(form.note)}</textarea></label><label class="photo-drop btn" for="photo">📷 Add a private photo (optional)<input id="photo" type="file" accept="image/*" capture="environment"></label>${form.photoDataUrl?`<img class="photo-preview" src="${form.photoDataUrl}" alt="Private entry preview">`:''}${photoHint?`<p class="fine">${esc(photoHint)}</p>`:''}${suggestionState.suggestion?`<p class="provenance-note fine" role="status">${esc(provenanceCopy(suggestionState,form).detail)}</p>`:'<p class="fine">Manual-mode photos stay in this browser and receive quality checks only.</p>'}<div class="row section"><button class="btn btn-ghost" id="back">← Back</button><button class="btn btn-primary" id="next">Safety check →</button></div>`;
+ const urgent=detectUrgentFlags(form.symptoms);return `<p class="fine">Select anything you have now. This is where Timmy stops joking.</p><div class="symptoms">${[['blood','Blood in stool or rectal bleeding'],['blackOrDarkRed','Black or dark-red stool'],['severePain','Severe or constant abdominal pain'],['vomiting','Vomiting'],['fever','Fever'],['cannotPassGas','Unable to pass gas']].map(([k,l])=>`<label class="check"><input type="checkbox" data-symptom="${k}" ${form.symptoms[k]?'checked':''}><span>${l}</span></label>`).join('')}</div>${followUpBlock()}<div id="urgent-box">${urgent.urgent?alertHtml(urgent.message):''}</div><div class="row section"><button class="btn btn-ghost" id="back">← Back</button><button class="btn btn-primary" id="save">Save private log</button></div><p class="fine">Not medical advice. Heavy or nonstop bleeding, fainting, or severe worsening symptoms can be an emergency—call local emergency services.</p>`;
 }
 function alertHtml(msg){return `<div class="alert"><strong>Pause and get medical help.</strong><p>${esc(msg)}</p></div>`}
 function bindStep(step){
- if(step===1){document.querySelectorAll('[data-type]').forEach(b=>b.onclick=()=>{form.bristolType=Number(b.dataset.type);aiSuggestion=null;showLogStep(1)});document.querySelector('#next').onclick=()=>showLogStep(2)}
- if(step===2){const color=document.querySelector('#color');color.value=form.color;color.onchange=()=>form.color=color.value;['urgency','discomfort'].forEach(k=>{const n=document.querySelector('#'+k);n.oninput=()=>{form[k]=Number(n.value);n.nextElementSibling.value=n.value}});document.querySelector('#note').oninput=e=>form.note=e.target.value;document.querySelector('#photo').onchange=handlePhoto;document.querySelector('#back').onclick=()=>showLogStep(1);document.querySelector('#next').onclick=()=>showLogStep(3)}
- if(step===3){document.querySelectorAll('[data-symptom]').forEach(c=>c.onchange=()=>{form.symptoms[c.dataset.symptom]=c.checked;document.querySelector('#urgent-box').innerHTML=detectUrgentFlags(form.symptoms).urgent?alertHtml(detectUrgentFlags(form.symptoms).message):''});document.querySelector('#back').onclick=()=>showLogStep(2);document.querySelector('#save').onclick=saveLog}
+ document.querySelector('#discard-draft')?.addEventListener('click',()=>{clearDraft();showLogStep(1)});
+ if(step===1){document.querySelectorAll('[data-type]').forEach(b=>b.onclick=()=>{const chosen=Number(b.dataset.type);form.bristolType=chosen;form.typeChosen=true;suggestionState=changeVisualField(suggestionState,'bristolType',chosen);showLogStep(1)});document.querySelector('#next').onclick=()=>{form.typeChosen=true;showLogStep(2)}}
+ if(step===2){const color=document.querySelector('#color');color.value=form.color;color.onchange=()=>{form.color=color.value;suggestionState=changeVisualField(suggestionState,'color',form.color);refreshProvenance()};['urgency','discomfort'].forEach(k=>{const n=document.querySelector('#'+k);n.oninput=()=>{form[k]=Number(n.value);n.nextElementSibling.value=n.value}});document.querySelector('#note').oninput=e=>form.note=e.target.value;document.querySelector('#photo').onchange=handlePhoto;document.querySelector('#back').onclick=()=>showLogStep(1);document.querySelector('#next').onclick=()=>showLogStep(3)}
+ if(step===3){document.querySelectorAll('[data-symptom]').forEach(c=>c.onchange=()=>{form.symptoms[c.dataset.symptom]=c.checked;const mirrored=HARD_STOOL_QUESTIONS.find(q=>q.urgentFlag===c.dataset.symptom);if(mirrored)followUpAnswers[mirrored.id]=c.checked;refreshFollowUp()});document.querySelectorAll('[data-followup]').forEach(b=>b.onclick=()=>{const question=HARD_STOOL_QUESTIONS.find(q=>q.id===b.dataset.followup);const value=b.dataset.answer==='yes';followUpAnswers[b.dataset.followup]=value;if(question?.urgentFlag)form.symptoms[question.urgentFlag]=value;syncFollowUpFlags();refreshFollowUp()});document.querySelector('#back').onclick=()=>showLogStep(2);document.querySelector('#save').onclick=saveLog}
 }
-async function handlePhoto(e){const file=e.target.files[0];if(!file)return;try{const result=await compressPhoto(file);photoDataUrl=result.dataUrl;photoHint=photoQualityMessage(result);showLogStep(2)}catch{photoHint='That image could not be read. Try another photo.';showLogStep(2)}}
+async function handlePhoto(e){const file=e.target.files[0];if(!file)return;try{const result=await compressPhoto(file);form.photoDataUrl=result.dataUrl;photoHint=photoQualityMessage(result);showLogStep(2)}catch{photoHint='That image could not be read. Try another photo.';showLogStep(2)}}
 function compressPhoto(file){return new Promise((resolve,reject)=>{const img=new Image(),url=URL.createObjectURL(file);img.onload=()=>{const scale=Math.min(1,1200/Math.max(img.width,img.height)),canvas=document.createElement('canvas');canvas.width=Math.round(img.width*scale);canvas.height=Math.round(img.height*scale);const ctx=canvas.getContext('2d');ctx.drawImage(img,0,0,canvas.width,canvas.height);const sample=ctx.getImageData(0,0,Math.min(canvas.width,120),Math.min(canvas.height,120)).data;let total=0;for(let i=0;i<sample.length;i+=4)total+=(sample[i]+sample[i+1]+sample[i+2])/3;URL.revokeObjectURL(url);resolve({dataUrl:canvas.toDataURL('image/jpeg',.7),width:img.width,height:img.height,brightness:total/(sample.length/4)/255})};img.onerror=()=>{URL.revokeObjectURL(url);reject()};img.src=url})}
-function saveLog(){const result=detectUrgentFlags(form.symptoms);const entry=sanitizeEntry({...form,photoDataUrl});try{entries.push(entry);saveEntries()}catch{entry.photoDataUrl='';entries[entries.length-1]=entry;saveEntries();toast('Log saved, but the photo was too large for browser storage')}document.querySelector('.sheet-backdrop')?.remove();view='home';render();toast(result.urgent?'Saved. Please follow the medical-care alert.':'Private log saved')}
+function saveLog(){const result=detectUrgentFlags(form.symptoms);const entry=sanitizeEntry({...form});try{entries.push(entry);saveEntries()}catch{entry.photoDataUrl='';entries[entries.length-1]=entry;saveEntries();toast('Log saved, but the photo was too large for browser storage')}clearDraft();document.querySelector('.sheet-backdrop')?.remove();view='home';render();toast(result.urgent?'Saved. Please follow the medical-care alert.':'Private log saved')}
 function render(){({home,calendar,timmy,privacy}[view]||home)()}
 
 render();

deploy/worker/Dockerfile

@@ -0,0 +1,67 @@
+# Timmy self-hosted vision worker (issue #15).
+#
+# Reproducible by construction: the llama.cpp revision and both model hashes are pinned here and in
+# deploy/worker/receipts.json, and tests/worker-container.test.js fails if either drifts from
+# scripts/bootstrap_selfhost_smolvlm.sh on the host.
+#
+# The weights are deliberately NOT baked into the image. They are mounted read-only at /models and
+# hash-verified against the pinned receipts by the entrypoint before the server starts.
+
+ARG LLAMA_CPP_COMMIT=6d05498314db1b57f81c271080018aa2d0b89be9
+ARG MODEL_SHA256=0cf76814555b8665149075b74ab6b5c1d428ea1d3d01c1918c12012e8d7c9f58
+ARG MMPROJ_SHA256=ae07ea1facd07dd3230c4483b63e8cda96c6944ad2481f33d531f79e892dd024
+
+# Digest-pinned bases, recorded in deploy/worker/receipts.json. A tag alone can be repointed, so
+# the digest is what makes this build reproducible.
+FROM nvidia/cuda:12.4.1-devel-ubuntu22.04@sha256:da6791294b0b04d7e65d87b7451d6f2390b4d36225ab0701ee7dfec5769829f5 AS build
+
+ARG LLAMA_CPP_COMMIT
+RUN apt-get update \
+ && apt-get install --yes --no-install-recommends git ca-certificates cmake build-essential \
+ && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /src
+RUN git init llama.cpp \
+ && cd llama.cpp \
+ && git remote add origin https://github.com/ggml-org/llama.cpp \
+ && git fetch --depth 1 origin "${LLAMA_CPP_COMMIT}" \
+ && git checkout --detach FETCH_HEAD
+RUN cmake -S llama.cpp -B llama.cpp/build -DCMAKE_BUILD_TYPE=Release -DLLAMA_CURL=OFF -DGGML_CUDA=ON \
+ && cmake --build llama.cpp/build --parallel "$(nproc)" --target llama-server
+
+FROM nvidia/cuda:12.4.1-runtime-ubuntu22.04@sha256:517da2300c184c9999ec203c2665244bdebd3578d12fcc7065e83667932643d9 AS runtime
+
+ARG MODEL_SHA256
+ARG MMPROJ_SHA256
+
+RUN apt-get update \
+ && apt-get install --yes --no-install-recommends curl ca-certificates \
+ && rm -rf /var/lib/apt/lists/* \
+ && mkdir -p /models
+
+COPY --from=build /src/llama.cpp/build/bin/ /usr/local/bin/
+COPY deploy/worker/entrypoint.sh /usr/local/bin/timmy-worker-entrypoint
+COPY scripts/worker_ready.sh /usr/local/bin/timmy-worker-ready
+RUN chmod 0755 /usr/local/bin/timmy-worker-entrypoint /usr/local/bin/timmy-worker-ready && ldconfig
+
+# No credential is configured: the worker is a private service the app reaches over host loopback.
+# 0.0.0.0 here is the address inside this container's own network namespace; the run recipe decides
+# exposure and publishes on 127.0.0.1 only.
+ENV TIMMY_MODEL_DIR=/models \
+    TIMMY_MODEL_FILE=/models/SmolVLM2-2.2B-Instruct-Q4_K_M.gguf \
+    TIMMY_MMPROJ_FILE=/models/mmproj-SmolVLM2-2.2B-Instruct-Q8_0.gguf \
+    TIMMY_MODEL_SHA256=${MODEL_SHA256} \
+    TIMMY_MMPROJ_SHA256=${MMPROJ_SHA256} \
+    TIMMY_MODEL_ALIAS=SmolVLM2-2.2B-Instruct \
+    TIMMY_MODEL_HOST=0.0.0.0 \
+    TIMMY_MODEL_PORT=8080
+
+USER 10001:10001
+EXPOSE 8080
+
+# Health is the post-load gate: the worker is not healthy until the pinned model is being served,
+# so an orchestrator cannot route to a worker that cannot answer. start-period covers a cold load.
+HEALTHCHECK --interval=30s --timeout=5s --start-period=600s --retries=3 \
+  CMD ["/usr/local/bin/timmy-worker-ready", "--host", "127.0.0.1", "--port", "8080", "--alias", "SmolVLM2-2.2B-Instruct"]
+
+ENTRYPOINT ["/usr/local/bin/timmy-worker-entrypoint"]

deploy/worker/build_image.sh

@@ -0,0 +1,85 @@
+#!/usr/bin/env bash
+# Build the pinned Timmy worker image (issue #15).
+#
+# Every pin is checked before docker is invoked, so an unpinned or floating reference fails here
+# rather than producing an image nobody can reproduce.
+set -euo pipefail
+
+REPO_ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
+RECEIPTS="$REPO_ROOT/deploy/worker/receipts.json"
+IMAGE="${TIMMY_WORKER_IMAGE:-timmy-vision-worker}"
+TAG="${TIMMY_WORKER_TAG:-$(date -u +%Y%m%d)}"
+PUBLISH_HOST="${TIMMY_WORKER_PUBLISH_HOST:-127.0.0.1}"
+PORT="${TIMMY_MODEL_PORT:-8080}"
+
+receipt_field() {
+  python3 - "$RECEIPTS" "$1" <<'PY'
+import json
+import sys
+document = json.load(open(sys.argv[1]))
+value = document
+for part in sys.argv[2].split('.'):
+    value = value[int(part)] if part.isdigit() else value[part]
+print(value)
+PY
+}
+
+# An explicit value still wins, but an empty one is treated as an invalid pin rather than a default.
+LLAMA_CPP_COMMIT="${TIMMY_LLAMA_CPP_COMMIT-$(receipt_field llamaCpp.commit)}"
+MODEL_SHA256="${TIMMY_MODEL_SHA256-$(receipt_field models.0.sha256)}"
+MMPROJ_SHA256="${TIMMY_MMPROJ_SHA256-$(receipt_field models.1.sha256)}"
+MODEL_FILE="$(receipt_field models.0.file)"
+MMPROJ_FILE="$(receipt_field models.1.file)"
+BUILD_BASE="$(receipt_field baseImages.build.reference)@$(receipt_field baseImages.build.digest)"
+RUNTIME_BASE="$(receipt_field baseImages.runtime.reference)@$(receipt_field baseImages.runtime.digest)"
+
+if [[ ! "$LLAMA_CPP_COMMIT" =~ ^[0-9a-f]{40}$ ]]; then
+  printf 'Refusing to build: the llama.cpp pin must be a 40-hex commit, got %s (floating refs are not reproducible).\n' "${LLAMA_CPP_COMMIT:-<empty>}" >&2
+  exit 64
+fi
+for pin in "$MODEL_SHA256" "$MMPROJ_SHA256"; do
+  if [[ ! "$pin" =~ ^[0-9a-f]{64}$ ]]; then
+    printf 'Refusing to build: every model hash must be a pinned sha256, got %s.\n' "${pin:-<empty>}" >&2
+    exit 64
+  fi
+done
+for base in "$BUILD_BASE" "$RUNTIME_BASE"; do
+  if [[ ! "$base" =~ @sha256:[0-9a-f]{64}$ ]]; then
+    printf 'Refusing to build: base images must be digest-pinned, got %s.\n' "$base" >&2
+    exit 64
+  fi
+done
+
+if [[ ! "$PUBLISH_HOST" =~ ^(127\.0\.0\.1|::1|localhost)$ ]]; then
+  printf 'Refusing to publish the worker outside loopback (127.0.0.1): got %s.\n' "$PUBLISH_HOST" >&2
+  exit 64
+fi
+
+print_plan() {
+  printf 'image: %s:%s\n' "$IMAGE" "$TAG"
+  printf 'llama.cpp commit: %s\n' "$LLAMA_CPP_COMMIT"
+  printf '%s sha256: %s\n' "$MODEL_FILE" "$MODEL_SHA256"
+  printf '%s sha256: %s\n' "$MMPROJ_FILE" "$MMPROJ_SHA256"
+  printf 'base image (build): %s\n' "$BUILD_BASE"
+  printf 'base image (runtime): %s\n' "$RUNTIME_BASE"
+  printf 'bind address: %s:%s\n' "$PUBLISH_HOST" "$PORT"
+  printf 'publish: %s:%s\n' "$PUBLISH_HOST" "$PORT"
+  printf 'docker build --file deploy/worker/Dockerfile --build-arg LLAMA_CPP_COMMIT=%s --build-arg MODEL_SHA256=%s --build-arg MMPROJ_SHA256=%s --tag %s:%s .\n' \
+    "$LLAMA_CPP_COMMIT" "$MODEL_SHA256" "$MMPROJ_SHA256" "$IMAGE" "$TAG"
+}
+
+if [[ "${1:-}" == '--print-plan' ]]; then
+  print_plan
+  exit 0
+fi
+
+print_plan
+cd "$REPO_ROOT"
+docker build \
+  --file deploy/worker/Dockerfile \
+  --build-arg "LLAMA_CPP_COMMIT=$LLAMA_CPP_COMMIT" \
+  --build-arg "MODEL_SHA256=$MODEL_SHA256" \
+  --build-arg "MMPROJ_SHA256=$MMPROJ_SHA256" \
+  --tag "$IMAGE:$TAG" \
+  .
+printf 'Built %s:%s from pinned receipts. Run it with deploy/worker/run_worker_container.sh\n' "$IMAGE" "$TAG"

deploy/worker/entrypoint.sh

@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+# Start the pinned worker after verifying the mounted weights (issue #15).
+#
+# Fails closed before the server is allowed to answer: a missing pin, an unreadable model, or a
+# hash mismatch stops the container instead of serving suggestions from an unknown model.
+set -euo pipefail
+
+MODEL="${TIMMY_MODEL_FILE:-/models/SmolVLM2-2.2B-Instruct-Q4_K_M.gguf}"
+MMPROJ="${TIMMY_MMPROJ_FILE:-/models/mmproj-SmolVLM2-2.2B-Instruct-Q8_0.gguf}"
+MODEL_SHA256="${TIMMY_MODEL_SHA256:-}"
+MMPROJ_SHA256="${TIMMY_MMPROJ_SHA256:-}"
+ALIAS="${TIMMY_MODEL_ALIAS:-SmolVLM2-2.2B-Instruct}"
+HOST="${TIMMY_MODEL_HOST:-0.0.0.0}"
+PORT="${TIMMY_MODEL_PORT:-8080}"
+THREADS="${TIMMY_MODEL_THREADS:-4}"
+
+for pin in "$MODEL_SHA256" "$MMPROJ_SHA256"; do
+  if [[ ! "$pin" =~ ^[0-9a-f]{64}$ ]]; then
+    printf 'Refusing to start: the pinned model hashes are missing or malformed.\n' >&2
+    exit 78
+  fi
+done
+
+for file in "$MODEL" "$MMPROJ"; do
+  if [[ ! -f "$file" ]]; then
+    printf 'Refusing to start: %s is not mounted. Mount the verified model directory read-only at /models.\n' "$file" >&2
+    exit 78
+  fi
+done
+
+printf '%s  %s\n%s  %s\n' "$MODEL_SHA256" "$MODEL" "$MMPROJ_SHA256" "$MMPROJ" | sha256sum --check --status || {
+  printf 'Refusing to start: mounted weights do not match the pinned receipts.\n' >&2
+  exit 78
+}
+
+printf 'Starting %s from pinned weights on %s:%s (private namespace)\n' "$ALIAS" "$HOST" "$PORT"
+exec llama-server \
+  --model "$MODEL" \
+  --mmproj "$MMPROJ" \
+  --alias "$ALIAS" \
+  --host "$HOST" \
+  --port "$PORT" \
+  --ctx-size 4096 \
+  --parallel 1 \
+  --threads "$THREADS" \
+  --no-webui

deploy/worker/receipts.json

@@ -0,0 +1,40 @@
+{
+  "schemaVersion": 1,
+  "issue": 15,
+  "llamaCpp": {
+    "repository": "https://github.com/ggml-org/llama.cpp",
+    "commit": "6d05498314db1b57f81c271080018aa2d0b89be9"
+  },
+  "baseImages": {
+    "build": {
+      "reference": "nvidia/cuda:12.4.1-devel-ubuntu22.04",
+      "digest": "sha256:da6791294b0b04d7e65d87b7451d6f2390b4d36225ab0701ee7dfec5769829f5"
+    },
+    "runtime": {
+      "reference": "nvidia/cuda:12.4.1-runtime-ubuntu22.04",
+      "digest": "sha256:517da2300c184c9999ec203c2665244bdebd3578d12fcc7065e83667932643d9"
+    }
+  },
+  "models": [
+    {
+      "file": "SmolVLM2-2.2B-Instruct-Q4_K_M.gguf",
+      "sha256": "0cf76814555b8665149075b74ab6b5c1d428ea1d3d01c1918c12012e8d7c9f58",
+      "mount": "/models/SmolVLM2-2.2B-Instruct-Q4_K_M.gguf"
+    },
+    {
+      "file": "mmproj-SmolVLM2-2.2B-Instruct-Q8_0.gguf",
+      "sha256": "ae07ea1facd07dd3230c4483b63e8cda96c6944ad2481f33d531f79e892dd024",
+      "mount": "/models/mmproj-SmolVLM2-2.2B-Instruct-Q8_0.gguf"
+    }
+  ],
+  "alias": "SmolVLM2-2.2B-Instruct",
+  "bind": {
+    "publishHost": "127.0.0.1",
+    "containerPort": 8080
+  },
+  "notes": [
+    "Model weights are never baked into the image; they are mounted read-only and hash-verified at start-up.",
+    "The pins are asserted equal to scripts/bootstrap_selfhost_smolvlm.sh by tests/worker-container.test.js so host and image cannot drift.",
+    "The worker needs no provider credential: it is a private loopback-only service."
+  ]
+}

deploy/worker/run_worker_container.sh

@@ -0,0 +1,61 @@
+#!/usr/bin/env bash
+# Run the pinned worker with the least privilege it can work under (issue #15).
+#
+# The worker is a private service. It is published on loopback only, mounts the verified weights
+# read-only, keeps an immutable root filesystem, and holds no credential of any kind.
+set -euo pipefail
+
+REPO_ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
+RECEIPTS="$REPO_ROOT/deploy/worker/receipts.json"
+IMAGE="${TIMMY_WORKER_IMAGE:-timmy-vision-worker}"
+TAG="${TIMMY_WORKER_TAG:-$(date -u +%Y%m%d)}"
+PORT="${TIMMY_MODEL_PORT:-8080}"
+PUBLISH_HOST="${TIMMY_WORKER_PUBLISH_HOST:-127.0.0.1}"
+MODEL_DIR="${TIMMY_WORKER_MODEL_DIR:-${TIMMY_SELFHOST_ROOT:-$HOME/.local/share/timmy-selfhost}/models}"
+NAME="${TIMMY_WORKER_CONTAINER:-timmy-vision-worker}"
+ALIAS="${TIMMY_MODEL_ALIAS:-SmolVLM2-2.2B-Instruct}"
+
+# Exposure is the one decision this recipe must never get wrong, so a non-loopback publish host is
+# refused rather than warned about.
+if [[ ! "$PUBLISH_HOST" =~ ^(127\.0\.0\.1|::1|localhost)$ ]]; then
+  printf 'Refusing to publish the worker outside loopback (127.0.0.1): got %s.\n' "$PUBLISH_HOST" >&2
+  exit 64
+fi
+
+if [[ ! "$PORT" =~ ^[0-9]{1,5}$ ]] || (( PORT < 1 || PORT > 65535 )); then
+  printf 'Refusing to start: the port must be a number between 1 and 65535, got %s.\n' "$PORT" >&2
+  exit 64
+fi
+
+RUN_ARGS=(
+  run
+  --detach
+  --name "$NAME"
+  --read-only
+  --cap-drop=ALL
+  --security-opt no-new-privileges
+  --tmpfs /tmp:rw,noexec,nosuid,size=64m
+  --volume "$MODEL_DIR:/models:ro"
+  --publish "127.0.0.1:${PORT}:8080"
+  --env "TIMMY_MODEL_PORT=8080"
+  --env "TIMMY_MODEL_THREADS=${TIMMY_MODEL_THREADS:-4}"
+  "$IMAGE:$TAG"
+)
+
+if [[ "${1:-}" == '--print-plan' ]]; then
+  printf 'image: %s:%s\n' "$IMAGE" "$TAG"
+  printf 'model directory (read-only mount): %s\n' "$MODEL_DIR"
+  printf 'bind address: %s:%s\n' "$PUBLISH_HOST" "$PORT"
+  printf 'publish: %s:%s\n' "$PUBLISH_HOST" "$PORT"
+  printf 'health: %s ready (post-load gate)\n' "$ALIAS"
+  printf 'docker %s\n' "${RUN_ARGS[*]}"
+  exit 0
+fi
+
+if [[ ! -d "$MODEL_DIR" ]]; then
+  printf 'Refusing to start: %s is not a directory. Install the pinned weights with scripts/bootstrap_selfhost_smolvlm.sh install.\n' "$MODEL_DIR" >&2
+  exit 78
+fi
+
+docker "${RUN_ARGS[@]}"
+printf 'Worker container %s started on %s:%s. Readiness: docker exec %s timmy-worker-ready\n' "$NAME" "$PUBLISH_HOST" "$PORT" "$NAME"

docs/PHOTO-DATAFLOW-THREAT-MODEL.md

@@ -0,0 +1,157 @@
+# Photo Data-Flow Threat Model — End-to-End Photo Path
+
+- **Status:** Accepted
+- **Issue:** [#20 — Write the end-to-end photo data-flow threat model](https://forge.alexanderwhitestone.com/git/stackchain/timmy-talking-turd/issues/20)
+- **Parent epic:** [#5 — Clinical safety, privacy & security](https://forge.alexanderwhitestone.com/git/stackchain/timmy-talking-turd/issues/5)
+- **Milestone:** M1 — Sovereign Photo Intelligence
+- **Date:** 2026-10-10
+- **Scope:** Every byte of a user's photo from capture to deletion on the `/api/analyze` path, plus the logs, exports, and consent records that touch it.
+
+## Why this exists
+
+Photo-first logging asks a user to hand Timmy an image of the most private output their body produces. That image is sensitive medical-adjacent data by default, so the data-flow boundaries must be explicit before any private beta, and every abuse case that is not yet fully mitigated must name an owner and a tracked remediation ticket. This model covers the browser, the API, the model worker, transient buffers, the training opt-in store, logs, exports, and deletion.
+
+## Product boundary (unchanged by this model)
+
+Timmy is non-diagnostic. AI may suggest only visible Bristol form, broad color, and image quality; every suggestion stays provisional until the user confirms or corrects it. Timmy must never diagnose disease, identify bleeding conclusively, infer pain, urgency, fever, or vomiting, or clear a food. Symptoms stay user-entered, and journal save is a separate decision from training contribution. Deterministic red-flag escalation runs on user-reported answers and is never model-gated or model-suppressible.
+
+No real medical images are ever added to this repository, its fixtures, its tests, or its Git history. Every fixture used in the photo path is synthetic.
+
+## Data-flow diagram
+
+```mermaid
+flowchart TD
+  Browser["Browser — camera or gallery pick, in-memory draft only"]
+  APIIngress["API ingress — server.mjs /api/analyze"]
+  TransientBuffers["Transient buffers — bounded body bytes, decode canvas"]
+  ModelWorker["Model worker — self-hosted vision, private loopback only"]
+  OptInStore["Training opt-in store — consented contributions only"]
+  Logs["Sanitized logs — counts and reasons, never bytes or base64"]
+  Exports["Exports — user-initiated JSON portability"]
+  Deletion["Deletion — withdrawal, purge, and tombstones"]
+
+  Browser -->|"image bytes plus explicit consent"| APIIngress
+  APIIngress -->|"length, dimension, and rate limits first"| TransientBuffers
+  TransientBuffers -->|"re-encoded baseline JPEG, metadata stripped"| ModelWorker
+  ModelWorker -->|"observable fields only — image dropped, never persisted"| APIIngress
+  APIIngress -->|"no image bytes"| Logs
+  Browser --> Exports
+  OptInStore --> Deletion
+  TransientBuffers --> Deletion
+  Logs --> Deletion
+```
+
+## Trust boundaries
+
+| # | Boundary | Trust posture |
+|---|---|---|
+| B1 | Browser to API ingress | Hostile network. Treat every upload as hostile and sensitive: sniff content, cap size and dimensions, rate-limit the client, and never trust the filename or declared MIME type. |
+| B2 | API ingress to model worker | Private loopback only. The worker is never exposed publicly and never receives a user identity. |
+| B3 | Model worker to provider or hosted profile | Disabled by default. When enabled, the operator carries the decision, the image is the only payload, and no ledger, symptom, or session data travels with it. |
+| B4 | App process to logs | One-way and lossy: counts, reasons, and durations leave; bytes, base64, filenames, and symptom text do not. |
+| B5 | App process to consent records | Contribution requires its own opt-in with a versioned receipt; journal save never implies contribution. |
+| B6 | Host to operator | The operator can reach data the app holds. Least privilege, documented purge, and no image bytes in operator-facing logs. |
+
+## Components
+
+### C1 — Browser
+
+Holds the captured image as an in-memory draft and renders the consent prompt. A photo awaiting consent is deliberately not written to storage, so it cannot survive the tab by accident, and the service worker never caches analysis requests or image bodies. Lifetime: until the tab closes, consent is refused, or the draft is cleared.
+
+### C2 — API ingress
+
+`server.mjs` `/api/analyze` is the only door for image bytes. It owns content sniffing, dimension and body caps, re-encode, metadata stripping, rate control, and the sanitized error vocabulary. Lifetimes are per request: nothing about an image is written to disk.
+
+### C3 — Model worker
+
+A self-hosted vision process bound to private loopback. It receives the re-encoded image and returns schema-constrained observable fields or an abstention. It returns no free text, and its output is provisional until the user confirms it.
+
+### C4 — Transient buffers
+
+Request body buffer, decode canvas, and the re-encode pipe. These are the moments the image exists in readable form; they are bounded, per request, and dropped when the request ends, on success or failure alike.
+
+### C5 — Training opt-in store
+
+Only images and labels a user explicitly contributed, each with consent version, receipt, and provenance. This store is not on the logging path: an ordinary journal save never reaches it.
+
+### C6 — Sanitized logs
+
+Operational logs for health, latency, abstention, and failure. They carry counts, reason codes, and durations; they never carry image bytes, base64, the original filename, or user symptom text.
+
+### C7 — Exports
+
+User-initiated JSON portability of the user's own ledger. Exports are generated on request, are not written server-side, and deliberately exclude photo bytes.
+
+### C8 — Deletion
+
+Withdrawal, purge, and tombstones. Deletion is addressable by contribution ID so it can reach derived artifacts, and a tombstone records that deletion happened without keeping what was deleted.
+
+## Threat register
+
+Each entry names the abuse case, the mitigation that is already committed or queued, the owning role, the tracked ticket that will prove the mitigation, and the artifact that will count as evidence.
+
+### T1 — Replay and re-submission
+
+- **Scenario:** An attacker replays a captured upload to exhaust inference capacity, correlate timing with a user session, or force repeated provider work from one image.
+- **Impact:** Denial of service for real users, cost amplification on hosted profiles, and weak linkage between a session and its image bytes.
+- **Mitigation:** Per-client fixed-window rate control on `/api/analyze` that fails with `429` and `Retry-After` before any provider work, opaque client identity held server-side rather than in the image payload, and no retention of over-limit payloads.
+- **Owner:** Timmy (ingress, area/backend)
+- **Testable follow-up:** #16
+- **Evidence:** An ingress test that drives the limiter past its window and asserts a rejected request never reaches the provider, with a separate assertion that no over-limit payload is retained.
+
+### T2 — Oversized input
+
+- **Scenario:** A decompression bomb, an enormous dimension count, or a multi-hundred-megabyte body arrives to consume worker memory, block the queue, or stall the request path indefinitely.
+- **Impact:** Worker exhaustion and queue starvation that degrade logging availability, up to a full outage of photo analysis.
+- **Mitigation:** Decoded-body, per-dimension, and timeout caps enforced before any provider or worker work; a bounded inference queue with cancellation and an overload fallback that returns the manual path instead of hanging.
+- **Owner:** Timmy (ingress, area/backend)
+- **Testable follow-up:** #17
+- **Evidence:** A queue-full and body-timeout test proving the request is rejected inside its budget and that the manual Bristol path remains one action away, per the acceptance criteria of #17.
+
+### T3 — Metadata leakage
+
+- **Scenario:** An uploaded photo carries EXIF, GPS, device identifiers, XMP, or PNG text chunks; or a failure path echoes base64 image bytes into an error message or a log line.
+- **Impact:** Location and device deanonymization, plus durable copies of the image outside the intended boundary, including in logs.
+- **Mitigation:** Content sniffing independent of filename and MIME, safe re-encode to baseline JPEG with a fixed argv, metadata dropped by construction, polyglot and malformed inputs rejected, and a fixed sanitized error vocabulary with no bytes, no base64, and no stack traces.
+- **Owner:** Timmy (ingress, area/backend)
+- **Testable follow-up:** #16
+- **Evidence:** A re-encode test asserting EXIF, GPS, XMP, and PNG text chunks are absent from the accepted bytes, paired with a log-scan test asserting no image bytes or base64 appear in request or error logs.
+
+### T4 — Dataset poisoning
+
+- **Scenario:** Mislabeled, duplicated, or adversarially crafted contributions enter the training corpus and shift the classifier toward a wrong or unsafe behavior, including teaching it to call a not-stool image a stool form.
+- **Impact:** Silent accuracy loss that is invisible in aggregate metrics and could undermine abstention exactly where the product must fail closed.
+- **Mitigation:** Immutable provenance per contribution, contributor-level splits so a single contributor cannot straddle train and evaluation, a reviewer and adjudication tool for form, color, quality, and exclusions, and a published dataset card with the labeling guide and split policy.
+- **Owner:** Privacy reviewer (human gate), with Timmy as release authority
+- **Testable follow-up:** #29
+- **Evidence:** The contributor-held-out evaluation harness and calibration report, with the reviewer and adjudication tool as the labeling control.
+
+### T5 — Unauthorized training
+
+- **Scenario:** A journal save is silently treated as consent, an image is trained on without a receipt, or a withdrawal fails to reach a derived artifact so contribution survives deletion.
+- **Impact:** Use of private data without consent, which breaks the product promise and the beta consent gate, and is irreversible once a model is trained.
+- **Mitigation:** Contribution is a separate opt-in decision with a versioned consent receipt shown before the data moves; journal save defaults to no contribution; withdrawal is addressable by contribution ID and reaches every derived artifact; journal saving never requires contribution.
+- **Owner:** Privacy reviewer (human gate)
+- **Testable follow-up:** #24
+- **Evidence:** An opt-in and withdrawal test proving journal save contributes nothing by default, that the consent version and receipt are shown before contribution, and that a withdrawal removes every derived artifact by contribution ID, with tombstone handling from #25.
+
+### T6 — Operator access
+
+- **Scenario:** The host operator — or anyone who reaches the host with the operator's privilege — reads image bytes, symptom text, or consent records from process memory, on-disk state, backups, or logs.
+- **Impact:** A single privileged reader can deanonymize a user's most private log, and an undocumented backup can outlive a deletion request.
+- **Mitigation:** Least-privilege host access, worker bound to private loopback with no public exposure, no image bytes or base64 in operator-facing logs, documented backup and rollback boundaries, and a purge procedure that names every place an image can exist.
+- **Owner:** Operator (host owner), with Timmy as release authority
+- **Testable follow-up:** #39
+- **Evidence:** The production topology, secrets, backup, and rollback runbook, exercised against the deletion path so that purge reaches memory, temporary files, logs, and backups, with observability from #41 confirming no bytes reach the metrics surface.
+
+## Accepted residual risks
+
+- **Host compromise.** Data in a running process can be read by a sufficiently privileged attacker. This is accepted for the private beta and bounded by least privilege plus the purge procedure in #39; it is not claimed as eliminated.
+- **Model accuracy.** The photo prefill remains blocked behind abstention and specialist-model evidence. A wrong or confident suggestion is treated as a user-correction problem, and the user remains the author of every saved entry, per #32 and the calibration work in #4.
+- **Provider profiles.** A hosted OpenAI-compatible profile moves the image off-host by definition. It stays opt-in, operator-controlled, and off by default, with readiness reporting before it is offered, per #19.
+
+## Verification
+
+- This document is enforced by `tests/threat-model.test.js`, which asserts that the diagram covers every byte-bearing component, that each required abuse case is a numbered threat with an owner and a tracked follow-up ticket, and that the model keeps the non-diagnostic boundary and ships no real medical images.
+- The test runs in `npm test` and therefore inside the CI quality gate and the release build, so the threat model cannot silently drift from the code it describes.
+- Boundary and boundary-adjacent claims are reviewed by the clinical and privacy gate (#22, #23) before beta; this model does not move that gate, it feeds it.

docs/PRODUCT-DECISIONS.md

@@ -30,6 +30,10 @@ Timmy may expose a smart free-text conversation backed by a fully tool-capable H
 
 The application’s deterministic urgent-symptom guidance runs before chat and remains authoritative when Hermes is offline, slow, malformed, or conversationally mistaken. Hermes must not diagnose, invent symptoms, override escalation, or take external/destructive actions without explicit user intent and confirmation.
 
+### Availability and draft retention
+
+Logging must never depend on AI availability. When the vision worker is offline, disabled, or still unknown, the photo-first flow offers no AI action and no analysis-consent prompt, and manual Bristol entry remains one action away from every photo step. A chosen photo and any entered context are retained as an in-session draft with a visible summary and an explicit start over; drafts are deliberately not persisted to storage, so a photo awaiting consent is never written to disk. The service worker never caches analysis requests or image bodies.
+
 ### Release authority
 
 Hermes/Timmy is the release authority for routine engineering, test, build, deployment, and release-candidate preparation. Automated evidence must remain reproducible and must not overstate model accuracy or safety.
@@ -55,3 +59,4 @@ Routine provisioning, deployment, label sweeps, and release-candidate assembly a
 - [Product brief and safety boundary](../PRODUCT.md)
 - [AI execution evidence](../AI-EVIDENCE.md)
 - [Sovereign vision decision and measured limitations](../research/SELF-HOSTED-STOOL-VISION.md)
+- [Photo data-flow threat model](./PHOTO-DATAFLOW-THREAT-MODEL.md)

package.json

@@ -4,16 +4,21 @@
   "private": true,
   "type": "module",
   "scripts": {
-    "test": "node --test tests/domain.test.js tests/analysis.test.js tests/vision-service.test.js tests/vision-config.test.js tests/hermes-agent-service.test.js tests/agent-queue.test.js tests/agent-turn-timeout.test.js tests/inference-queue.test.js tests/inference-queue-cancellation.test.js tests/inference-zero-call.test.js tests/agent-gateway.acceptance.test.js tests/staging-health.test.js tests/service-worker-runtime.test.js tests/training-ingest.test.js tests/ci-workflow.test.js tests/product-decisions.test.js tests/release-demo.test.js tests/selfhost-bootstrap.test.js tests/staging-config.test.js",
+    "test": "node --test tests/domain.test.js tests/analysis.test.js tests/vision-service.test.js tests/vision-config.test.js tests/draft.test.js tests/suggestion.test.js tests/followup.test.js tests/vision-readiness.test.js tests/hermes-agent-service.test.js tests/agent-gateway.acceptance.test.js tests/staging-health.test.js tests/service-worker-runtime.test.js tests/training-ingest.test.js tests/ci-workflow.test.js tests/product-decisions.test.js tests/release-demo.test.js tests/selfhost-bootstrap.test.js tests/staging-config.test.js tests/threat-model.test.js tests/vision-corpus.test.js tests/vision-boundary.test.js tests/worker-benchmark.test.js tests/worker-ready.test.js tests/worker-container.test.js tests/summary.test.js tests/escalation-regression.test.js",
     "test:ui": "node tests/ui.acceptance.mjs",
     "test:photo": "node tests/photo-first.acceptance.mjs",
+    "test:mobile-capture": "node tests/mobile-capture.acceptance.mjs",
     "test:sleek": "node tests/sleek-chat.acceptance.mjs",
-    "test:queue-acceptance": "node tests/inference-queue.acceptance.mjs",
-    "test:shutdown-acceptance": "node tests/server-shutdown.acceptance.mjs",
+    "test:manual-fallback": "node tests/manual-fallback.acceptance.mjs",
+    "test:provisional": "node tests/provisional-suggestion.acceptance.mjs",
+    "test:followup": "node tests/followup.acceptance.mjs",
+    "test:vision-refusal": "node tests/vision-refusal.acceptance.mjs",
     "test:staging-smoke": "node tests/staging.acceptance.mjs",
-    "check:syntax": "node --check app.js && node --check server.mjs && node --check service-worker.js && node --check src/analysis.js && node --check src/domain.js && node --check src/hermes-agent-service.js && node --check src/inference-queue.js && node --check src/vision-config.js && node --check src/vision-service.js && node --check scripts/record_release_demo.mjs && node --check tests/inference-queue.acceptance.mjs && node --check tests/server-shutdown.acceptance.mjs && node --check tests/staging.acceptance.mjs && bash -n scripts/bootstrap_selfhost_smolvlm.sh && bash -n scripts/run_selfhost_smolvlm.sh && python3 -m py_compile scripts/ingest_training_photo.py scripts/build_release.py scripts/deploy_staging.py",
+    "test:pattern-summary": "node tests/pattern-summary.acceptance.mjs",
+    "check:syntax": "node --check app.js && node --check server.mjs && node --check service-worker.js && node --check src/analysis.js && node --check src/domain.js && node --check src/draft.js && node --check src/suggestion.js && node --check src/followup.js && node --check src/vision-readiness.js && node --check src/hermes-agent-service.js && node --check src/vision-config.js && node --check src/vision-service.js && node --check src/vision-corpus.js && node --check src/summary.js && node --check scripts/record_release_demo.mjs && node --check tests/staging.acceptance.mjs && node --check tests/manual-fallback.acceptance.mjs && node --check tests/provisional-suggestion.acceptance.mjs && node --check tests/followup.acceptance.mjs && node --check tests/vision-refusal.acceptance.mjs && bash -n scripts/bootstrap_selfhost_smolvlm.sh && bash -n scripts/run_selfhost_smolvlm.sh && python3 -m py_compile scripts/ingest_training_photo.py scripts/build_release.py scripts/deploy_staging.py scripts/build_vision_corpus.py && node --check scripts/record_worker_benchmark.mjs && node --check tests/worker-readiness.acceptance.mjs && node --check tests/pattern-summary.acceptance.mjs && bash -n scripts/worker_ready.sh && bash -n deploy/worker/entrypoint.sh && bash -n deploy/worker/build_image.sh && bash -n deploy/worker/run_worker_container.sh",
     "check:diff": "bash scripts/check_diff.sh",
-    "start": "node server.mjs"
+    "start": "node server.mjs",
+    "test:worker-readiness": "node tests/worker-readiness.acceptance.mjs"
   },
   "devDependencies": {
     "playwright": "^1.62.1"

scripts/bootstrap_selfhost_smolvlm.sh

@@ -137,6 +137,10 @@ case "${1:-}" in
   start)
     start_worker
     ;;
+  ready)
+    # Post-load readiness (issue #15): delegate so the host and the container gate cannot drift.
+    exec "$(dirname "$0")/worker_ready.sh" --host "$HOST" --port "$PORT" --alias SmolVLM2-2.2B-Instruct "${@:2}"
+    ;;
   health)
     health_worker
     ;;
@@ -144,7 +148,7 @@ case "${1:-}" in
     stop_worker
     ;;
   *)
-    printf 'Usage: %s {install|start|health|stop|receipt|verify}\n' "$0" >&2
+    printf 'Usage: %s {install|start|health|ready|stop|receipt|verify}\n' "$0" >&2
     exit 64
     ;;
 esac

scripts/build_release.py

@@ -26,6 +26,27 @@ SECRET_PATTERNS = (
     re.compile(r"(?i)(?:api[_-]?key|access[_-]?token|authorization)\s*[:=]\s*['\"](?!\.\.\.|top-secret|test-|example|placeholder)[A-Za-z0-9_./+:-]{16,}"),
 )
 
+# Captions that must be proven on camera (via the demo's own receipt) for the release to pass.
+DEMO_REQUIRED_CAPTIONS = (
+    "One clear photo action. Manual logging stays one tap away.",
+    "Nothing uploads until explicit consent",
+    "The suggestion stays provisional — nothing is applied or saved until you confirm it",
+    "Type 2 is hard or lumpy, so Timmy asks about soreness, hydration, blood, and black-or-tarry — never guessed from the photo",
+    "Vision worker offline — the AI and consent steps disappear instead of failing after upload",
+    "Every byte-bearing control the model names, in the running app: local ledger, consent-gated upload, portable export, full deletion",
+    "Delete all local data clears the ledger in this browser; there is no server copy of it to keep",
+    "Hermes Agent connected — free-text, contextual, and server-side",
+    "Urgent language is intercepted deterministically before Hermes",
+    "Bleeding reported as wiping still escalates, in the app’s own fixed words",
+    "Tarry and black stool wording escalates too: one red flag, one unchanging message",
+    "A tarry note already saved in the journal escalates the same way, before any provider call",
+    "An out-of-range answer fails closed: nothing is applied and no provider detail reaches you",
+    "A filled-in field that is out of range still fails closed, even when the other field came back blank",
+    "Reachable is not loaded: no AI control, no consent, and no upload until the pinned model is resident",
+    "Every pattern line names the confirmed logs behind it, and following one shows exactly those records",
+    "Two logs is not a pattern: the summary refuses to describe a trend it cannot support",
+)
+
 
 def run(args: list[str], cwd: Path, *, capture: bool = False, env: dict[str, str] | None = None) -> str:
     print("+", " ".join(args), flush=True)
@@ -74,6 +95,10 @@ def main() -> int:
     status = run(["git", "status", "--porcelain"], ROOT, capture=True)
     if status:
         raise SystemExit("Release requires a clean committed tree")
+    release_delta = os.environ.get("TIMMY_RELEASE_DELTA",
+                                   "Verified rebuild of the current user-visible feature path — no new feature is claimed.").strip()
+    if not release_delta:
+        raise SystemExit("TIMMY_RELEASE_DELTA must not be empty")
     commit = run(["git", "rev-parse", "HEAD"], ROOT, capture=True)
     short = commit[:12]
     commit_epoch = int(run(["git", "show", "-s", "--format=%ct", commit], ROOT, capture=True))
@@ -91,6 +116,8 @@ def main() -> int:
         run(["git", "checkout", "--quiet", commit], tree)
         run(["npm", "ci", "--ignore-scripts"], tree)
         run(["npm", "test"], tree)
+        # The committed corpus hashes are an integrity receipt: verify them before anything is built.
+        run(["python3", "scripts/build_vision_corpus.py", "--verify"], tree)
         server_env = dict(os.environ)
         server_env.update({"HOST": "127.0.0.1", "PORT": "4173", "TIMMY_VISION_ENABLED": "false"})
         server_log = (release_dir / "acceptance-server.log").open("w", encoding="utf-8")
@@ -109,11 +136,30 @@ def main() -> int:
                 raise SystemExit("Acceptance server did not become ready")
             run(["npm", "run", "test:ui"], tree)
             run(["npm", "run", "test:photo"], tree)
+            run(["npm", "run", "test:mobile-capture"], tree)
             run(["npm", "run", "test:sleek"], tree)
+            run(["npm", "run", "test:manual-fallback"], tree)
+            run(["npm", "run", "test:provisional"], tree)
+            run(["npm", "run", "test:followup"], tree)
+            run(["npm", "run", "test:vision-refusal"], tree)
+            run(["npm", "run", "test:worker-readiness"], tree)
+            run(["npm", "run", "test:pattern-summary"], tree)
             demo_raw = release_dir / f"timmy-talking-turd-{version}-demo.raw.webm"
+            caption_receipt = release_dir / f"timmy-talking-turd-{version}-demo-captions.json"
             demo_env = dict(server_env)
             demo_env["TIMMY_RELEASE_VERSION"] = version
+            demo_env["TIMMY_RELEASE_DEMO_DELTA"] = release_delta
+            demo_env["TIMMY_DEMO_CAPTIONS_OUT"] = str(caption_receipt)
             run(["node", "scripts/record_release_demo.mjs", str(demo_raw)], tree, env=demo_env)
+            if not caption_receipt.exists():
+                raise SystemExit("Release demo produced no on-camera caption receipt")
+            recorded = json.loads(caption_receipt.read_text(encoding="utf-8"))
+            onscreen = [str(line) for line in (recorded.get("captions") or [])]
+            if recorded.get("releaseDelta") != release_delta or not any(release_delta in line for line in onscreen):
+                raise SystemExit("Release demo did not state the declared release delta on camera")
+            for required in DEMO_REQUIRED_CAPTIONS:
+                if not any(required in line for line in onscreen):
+                    raise SystemExit(f"Release demo is missing a required on-camera caption: {required}")
         finally:
             server.terminate()
             try:
@@ -131,13 +177,23 @@ def main() -> int:
         if len(video_streams) != 1 or video_streams[0].get("codec_name") != "h264" or video_streams[0].get("pix_fmt") != "yuv420p" or video_streams[0].get("width") != 720 or video_streams[0].get("height") != 1280:
             raise SystemExit("Release demo media probe failed")
         contact_sheet = release_dir / f"timmy-talking-turd-{version}-demo-contact-sheet.jpg"
-        run(["ffmpeg", "-y", "-v", "error", "-i", str(demo), "-vf", "fps=1/2,scale=180:-1,tile=4x3:padding=4:margin=4", "-frames:v", "1", str(contact_sheet)], tree)
+        # Span the whole recording: a fixed 1/2 fps sheet only covered the first 24s of a longer demo.
+        demo_duration = float(run(["ffprobe", "-v", "error", "-show_entries", "format=duration", "-of", "csv=p=0", str(demo)], tree, capture=True))
+        if demo_duration <= 0:
+            raise SystemExit("Release demo has no measurable duration")
+        run(["ffmpeg", "-y", "-v", "error", "-i", str(demo), "-vf", f"fps={12 / demo_duration:.6f},scale=180:-1,tile=4x3:padding=4:margin=4", "-frames:v", "1", str(contact_sheet)], tree)
+        if not contact_sheet.exists() or contact_sheet.stat().st_size == 0:
+            raise SystemExit("Release demo contact sheet was not produced")
         run(["npm", "audit", "--audit-level=high"], tree)
-        for file in ("app.js", "server.mjs", "service-worker.js", "src/analysis.js", "src/domain.js", "src/hermes-agent-service.js", "src/vision-config.js", "src/vision-service.js", "tests/staging.acceptance.mjs"):
+        for file in ("app.js", "server.mjs", "service-worker.js", "src/analysis.js", "src/domain.js", "src/draft.js", "src/suggestion.js", "src/followup.js", "src/vision-readiness.js", "src/hermes-agent-service.js", "src/vision-config.js", "src/vision-service.js", "src/vision-corpus.js", "src/summary.js", "scripts/record_worker_benchmark.mjs", "tests/staging.acceptance.mjs", "tests/vision-refusal.acceptance.mjs", "tests/worker-readiness.acceptance.mjs", "tests/pattern-summary.acceptance.mjs"):
             run(["node", "--check", file], tree)
         run(["bash", "-n", "scripts/bootstrap_selfhost_smolvlm.sh"], tree)
         run(["bash", "-n", "scripts/run_selfhost_smolvlm.sh"], tree)
-        run(["python3", "-m", "py_compile", "scripts/ingest_training_photo.py", "scripts/build_release.py"], tree)
+        run(["bash", "-n", "scripts/worker_ready.sh"], tree)
+        run(["bash", "-n", "deploy/worker/entrypoint.sh"], tree)
+        run(["bash", "-n", "deploy/worker/build_image.sh"], tree)
+        run(["bash", "-n", "deploy/worker/run_worker_container.sh"], tree)
+        run(["python3", "-m", "py_compile", "scripts/ingest_training_photo.py", "scripts/build_release.py", "scripts/build_vision_corpus.py"], tree)
         run(["git", "diff", "--check", commit], tree)
 
         names = tracked_files(tree)
@@ -156,10 +212,19 @@ def main() -> int:
             f"# Timmy review release {version}\n\n"
             f"- Source commit: [{commit}]({PUBLIC_REPO}/commit/{commit})\n"
             f"- Build date (UTC): {release_date}\n"
+            f"- Release delta: {release_delta}\n"
             "- Sleek three-destination shell with one dominant photo action and quiet manual fallback\n"
+            "- Manual fallback: vision-offline logging stays one action away with an in-session draft and explicit start over\n"
             "- Smart free-text Timmy chat backed by authenticated server-side Hermes session continuity\n"
             "- Agent safety: exact-origin HttpOnly session, bounded text-only ledger context, no browser credentials or session IDs\n"
             "- Vision profiles: hosted and self-hosted SmolVLM2 bootstrap\n"
+            "- AI suggestions stay provisional: suggested, confirmed, and corrected states are distinct and screen-reader described; correcting one clears the AI-confirmed state without losing user context\n"
+            "- Hard-stool follow-up: a Bristol 1-2 entry asks user-reported questions (difficulty passing, soreness, visible blood, truly black/tarry versus dark brown, hydration); mild reports get non-diagnostic self-care, and a confirmed red-flag answer lands on the same deterministic escalation path as manual logging\n"
+            "- Vision corpus: a committed CC0 synthetic corpus (stool, non-stool, blur, glare, empty bowl, malformed response) proves every reply is schema-valid or fails closed; a schema-valid reply with unreadable fields abstains instead of erroring, and unparsable or out-of-range replies return plain copy with nothing applied — including a reply that fills in one field and leaves the other blank, where an out-of-range value still fails closed instead of being reported as an unreadable photo (issue #73)\n"
+            "- Self-hosted worker container: a digest-pinned image that builds the pinned llama.cpp revision, mounts hash-verified weights read-only, runs unprivileged with no credential, and is published on loopback only (issue #15)\n"
+            "- Post-load readiness: the app offers AI only once the pinned model is actually loaded, so a reachable-but-unloaded worker falls back to manual logging in one tap instead of failing after the upload (issue #15)\n"
+            "- Target-GPU benchmark: scripts/record_worker_benchmark.mjs records cold start, warm latency, and VRAM on the target GPU and refuses to write a receipt it did not measure; no GPU measurement is bundled with this release\n"
+            "- Explainable pattern summaries (issue #34): the home insight card reports confirmed-log counts and form groupings per window, every line names the exact confirmed records behind it, following a citation opens those records, and a window below the minimum says it is too sparse instead of describing a trend; no line explains a cause, rules on food, or offers a health verdict\n"
             "- Safety: suggestions are observable-field assistance, never diagnosis; user confirmation is required\n"
             "- Known limitation: open-weight VLM acceptance is proven, Bristol accuracy is not clinically validated\n"
             "- Package excludes model weights, medical-image corpora, raw research pages, generated screenshots, and video production assets\n"
@@ -190,6 +255,7 @@ def main() -> int:
         "project": "Timmy the Talking Turd",
         "version": version,
         "commit": commit,
+        "release_delta": release_delta,
         "source_date_utc": source_date.isoformat(),
         "built_at_utc": dt.datetime.now(dt.timezone.utc).isoformat(),
         "artifact": archive.name,
@@ -204,19 +270,27 @@ def main() -> int:
             "codec": "h264",
             "pixel_format": "yuv420p",
             "recorded_from_working_app": True,
-            "fixture_data": "synthetic-Type-4, deterministic vision suggestion, and deterministic Hermes chat response",
+            "fixture_data": "synthetic-Type-4, deterministic vision suggestion reviewed, confirmed, and corrected to Type 2, user-reported hard-stool follow-up with non-diagnostic self-care and a confirmed black/tarry red flag, the CC0 synthetic vision corpus replaying a non-stool refusal, an unreadable-fields abstention, an out-of-range fail-closed reply, and a blank-plus-out-of-range fail-closed reply, offline vision status, fictional multi-day sample logs driving the explainable pattern summary and its citation sheet, a sparse fictional window showing the insufficient-data copy, and deterministic Hermes chat response",
         },
         "gates": {
             "unit_security": "passed",
             "mobile_green_path": "passed",
             "photo_first_acceptance": "passed",
             "sleek_hermes_chat_acceptance": "passed",
+            "manual_fallback_draft_recovery": "passed",
+            "provisional_suggestion_state": "passed",
+            "hard_stool_followup": "passed",
+            "vision_corpus_refusal": "passed",
+            "worker_container_receipts": "passed",
+            "worker_post_load_readiness": "passed",
+            "longitudinal_pattern_summary": "passed",
             "dependency_audit_high": "passed",
             "syntax": "passed",
             "secret_scan": "passed",
             "forbidden_artifacts": "passed",
             "feature_demo_full_decode": "passed",
             "feature_demo_media_probe": "passed",
+            "release_delta_visible_on_camera": "passed",
         },
     }
     manifest_path = release_dir / "manifest.json"

scripts/build_vision_corpus.py

@@ -0,0 +1,293 @@
+#!/usr/bin/env python3
+"""Generate the deterministic synthetic vision corpus for issue #18.
+
+Every fixture is drawn from fixed integer math: no camera, no human subject, no
+third-party content, and no randomness. That keeps the corpus redistributable and
+keeps the recorded SHA-256 hashes meaningful as an integrity receipt.
+
+Usage:
+  python3 scripts/build_vision_corpus.py            # (re)write fixtures and manifest.json
+  python3 scripts/build_vision_corpus.py --verify   # verify committed fixtures against the manifest
+"""
+from __future__ import annotations
+
+import argparse
+import hashlib
+import json
+import sys
+from pathlib import Path
+from typing import Any, Callable
+
+from PIL import Image, ImageDraw, ImageFilter
+
+LICENSE = "CC0-1.0"
+CORPUS_DIR = Path(__file__).resolve().parents[1] / "tests" / "fixtures" / "vision-corpus"
+WIDTH, HEIGHT = 640, 480
+PROVENANCE = "Synthetic fixture drawn deterministically by scripts/build_vision_corpus.py; no camera, no human subject, no third-party content."
+
+OBSERVATION_STRINGS = {
+    "smooth": "Smooth, formed appearance.",
+    "flatware": "Flatware on a tray.",
+    "unclear": "Form is unclear.",
+    "highlight": "Large specular highlight hides the surface.",
+    "container": "Empty container.",
+    "confident": "Confident.",
+    "partial": "Form read, colour not.",
+}
+
+
+def background(color: tuple[int, int, int]) -> Image.Image:
+    """A flat canvas with a coarse, deterministic shade band."""
+    image = Image.new("RGB", (WIDTH, HEIGHT), color)
+    draw = ImageDraw.Draw(image)
+    for index in range(4):
+        shade = tuple(min(255, channel + 6 * index) for channel in color)
+        draw.rectangle([0, index * 120, WIDTH, index * 120 + 119], fill=shade)
+    return image
+
+
+def blob(image: Image.Image, box: tuple[int, int, int, int], tone: tuple[int, int, int]) -> None:
+    draw = ImageDraw.Draw(image)
+    draw.ellipse(box, fill=tone)
+    left, top, right, bottom = box
+    inset = max(4, (right - left) // 6)
+    draw.ellipse([left + inset, top + inset, right - inset, bottom - inset],
+                 fill=tuple(min(255, channel + 10) for channel in tone))
+
+
+def stool_like() -> Image.Image:
+    image = background((226, 222, 212))
+    blob(image, (170, 150, 470, 330), (108, 76, 48))
+    return image
+
+
+def non_stool_scene() -> Image.Image:
+    image = background((198, 202, 208))
+    draw = ImageDraw.Draw(image)
+    draw.ellipse([120, 90, 520, 390], fill=(244, 244, 240))
+    draw.rectangle([60, 200, 300, 224], fill=(120, 126, 134))
+    draw.rectangle([340, 200, 580, 224], fill=(120, 126, 134))
+    return image
+
+
+def blur_low_detail() -> Image.Image:
+    return stool_like().filter(ImageFilter.GaussianBlur(5))
+
+
+def glare_overexposed() -> Image.Image:
+    image = background((222, 218, 208))
+    blob(image, (150, 140, 430, 300), (104, 74, 46))
+    draw = ImageDraw.Draw(image)
+    draw.polygon([(380, 200), (640, 120), (640, 360), (420, 330)], fill=(252, 252, 250))
+    draw.ellipse([470, 210, 620, 320], fill=(255, 255, 255))
+    return image
+
+
+def empty_bowl() -> Image.Image:
+    image = background((214, 210, 202))
+    draw = ImageDraw.Draw(image)
+    draw.ellipse([130, 90, 510, 400], fill=(238, 236, 230))
+    draw.ellipse([175, 130, 465, 360], fill=(206, 204, 198))
+    draw.ellipse([220, 170, 420, 320], fill=(232, 230, 224))
+    return image
+
+
+def unusable_tone() -> Image.Image:
+    image = background((202, 206, 198))
+    blob(image, (190, 160, 450, 320), (128, 118, 92))
+    return image
+
+
+def shaded_tone() -> Image.Image:
+    image = background((216, 214, 206))
+    blob(image, (180, 155, 460, 325), (96, 84, 52))
+    draw = ImageDraw.Draw(image)
+    draw.rectangle([0, 300, WIDTH, 306], fill=(180, 178, 170))
+    return image
+
+
+def half_read_tone() -> Image.Image:
+    """A fixture for the reply shape that fills one field and blanks the other (issue #73)."""
+    image = background((208, 212, 204))
+    blob(image, (175, 150, 455, 322), (112, 96, 66))
+    draw = ImageDraw.Draw(image)
+    draw.rectangle([0, 200, WIDTH // 2, 206], fill=(196, 194, 186))
+    draw.rectangle([WIDTH // 2, 260, WIDTH, 266], fill=(170, 168, 160))
+    return image
+
+
+def content(payload: dict[str, object] | str) -> str:
+    return payload if isinstance(payload, str) else json.dumps(payload, separators=(",", ":"))
+
+
+def cases() -> list[dict[str, Any]]:
+    return [
+        {
+            "id": "stool-like-formed",
+            "caseClass": "stool",
+            "image": stool_like,
+            "expectedOutcome": "suggestion",
+            "expectedReason": "schema_valid_suggestion",
+            "providerContent": content({
+                "isStool": True, "bristolType": 4, "color": "brown", "confidence": 0.83,
+                "imageQuality": "good", "observations": OBSERVATION_STRINGS["smooth"],
+            }),
+        },
+        {
+            "id": "non-stool-scene",
+            "caseClass": "non-stool",
+            "image": non_stool_scene,
+            "expectedOutcome": "abstained",
+            "expectedReason": "not_stool",
+            "providerContent": content({
+                "isStool": False, "bristolType": None, "color": None, "confidence": 0.97,
+                "imageQuality": "good", "observations": OBSERVATION_STRINGS["flatware"],
+            }),
+        },
+        {
+            "id": "blur-low-detail",
+            "caseClass": "blur",
+            "image": blur_low_detail,
+            "expectedOutcome": "abstained",
+            "expectedReason": "low_confidence",
+            "providerContent": content({
+                "isStool": True, "bristolType": 4, "color": "brown", "confidence": 0.41,
+                "imageQuality": "poor", "observations": OBSERVATION_STRINGS["unclear"],
+            }),
+        },
+        {
+            "id": "glare-overexposed",
+            "caseClass": "glare",
+            "image": glare_overexposed,
+            "expectedOutcome": "abstained",
+            "expectedReason": "unusable_visual_fields",
+            "providerContent": content({
+                "isStool": True, "bristolType": None, "color": None, "confidence": 0.66,
+                "imageQuality": "poor", "observations": OBSERVATION_STRINGS["highlight"],
+            }),
+        },
+        {
+            "id": "empty-bowl",
+            "caseClass": "empty-bowl",
+            "image": empty_bowl,
+            "expectedOutcome": "abstained",
+            "expectedReason": "not_stool",
+            "providerContent": content({
+                "isStool": False, "bristolType": None, "color": None, "confidence": 0.93,
+                "imageQuality": "good", "observations": OBSERVATION_STRINGS["container"],
+            }),
+        },
+        {
+            "id": "malformed-response",
+            "caseClass": "malformed-response",
+            "image": unusable_tone,
+            "expectedOutcome": "fail_closed",
+            "expectedReason": "unparsable_content",
+            "providerContent": "Sure! It looks like a Type 4 to me. Hope that helps.",
+        },
+        {
+            "id": "out-of-range-fields",
+            "caseClass": "malformed-response",
+            "image": shaded_tone,
+            "expectedOutcome": "fail_closed",
+            "expectedReason": "out_of_range_or_missing_fields",
+            # Confidence stays inside the contract so this reply reaches the field-range check. At 1.4 it
+            # died at the confidence gate instead, which credited the `out_of_range_or_missing_fields`
+            # label to a guard the case never exercised (issue #73).
+            "providerContent": content({
+                "isStool": True, "bristolType": 9, "color": "purple", "confidence": 0.9,
+                "imageQuality": "excellent", "observations": OBSERVATION_STRINGS["confident"],
+            }),
+        },
+        {
+            "id": "blank-plus-out-of-range",
+            "caseClass": "malformed-response",
+            "image": half_read_tone,
+            "expectedOutcome": "fail_closed",
+            "expectedReason": "out_of_range_or_missing_fields",
+            # The class the blank-first ordering used to let through (issue #73): one field is blank and
+            # the other is a filled-in, impossible value. A filled-in field is a claim, so this must fail
+            # closed rather than abstain as `unusable_visual_fields`.
+            "providerContent": content({
+                "isStool": True, "bristolType": 9, "color": None, "confidence": 0.9,
+                "imageQuality": "good", "observations": OBSERVATION_STRINGS["partial"],
+            }),
+        },
+    ]
+
+
+def write_fixture(definition: dict[str, Any], directory: Path) -> dict[str, Any]:
+    name = f"{definition['id']}.png"
+    target = directory / name
+    factory: Callable[[], Image.Image] = definition["image"]
+    factory().save(target, "PNG", optimize=True)
+    data = target.read_bytes()
+    return {
+        "id": definition["id"],
+        "caseClass": definition["caseClass"],
+        "file": name,
+        "bytes": len(data),
+        "sha256": hashlib.sha256(data).hexdigest(),
+        "width": WIDTH,
+        "height": HEIGHT,
+        "format": "png",
+        "synthetic": True,
+        "license": LICENSE,
+        "provenance": PROVENANCE,
+        "expectedOutcome": definition["expectedOutcome"],
+        "expectedReason": definition["expectedReason"],
+        "providerContent": definition["providerContent"],
+    }
+
+
+def manifest(entries: list[dict[str, object]]) -> dict[str, object]:
+    return {
+        "schemaVersion": 1,
+        "generator": "scripts/build_vision_corpus.py",
+        "license": LICENSE,
+        "note": "Synthetic fixtures only. No real medical imagery, no personal data, and no third-party content.",
+        "cases": entries,
+    }
+
+
+def write(directory: Path) -> int:
+    directory.mkdir(parents=True, exist_ok=True)
+    entries = [write_fixture(definition, directory) for definition in cases()]
+    (directory / "manifest.json").write_text(json.dumps(manifest(entries), indent=2) + "\n", encoding="utf-8")
+    print(f"wrote {len(entries)} fixtures to {directory}")
+    return 0
+
+
+def verify(directory: Path) -> int:
+    manifest_path = directory / "manifest.json"
+    recorded = json.loads(manifest_path.read_text(encoding="utf-8"))
+    problems: list[str] = []
+    for entry in recorded.get("cases", []):
+        path = directory / str(entry.get("file"))
+        if not path.is_file():
+            problems.append(f"{entry.get('id')}: missing fixture {entry.get('file')}")
+            continue
+        data = path.read_bytes()
+        if hashlib.sha256(data).hexdigest() != entry.get("sha256"):
+            problems.append(f"{entry.get('id')}: bytes do not match the recorded sha256")
+        if len(data) != entry.get("bytes"):
+            problems.append(f"{entry.get('id')}: byte length does not match the manifest")
+    if problems:
+        for problem in problems:
+            print(problem, file=sys.stderr)
+        return 1
+    print(f"verified {len(recorded.get('cases', []))} corpus fixtures against manifest.json")
+    return 0
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--verify", action="store_true", help="check committed fixtures against the manifest instead of rewriting")
+    parser.add_argument("--directory", default=str(CORPUS_DIR))
+    args = parser.parse_args()
+    directory = Path(args.directory)
+    return verify(directory) if args.verify else write(directory)
+
+
+if __name__ == "__main__":
+    sys.exit(main())

scripts/record_release_demo.mjs

@@ -1,12 +1,41 @@
 import { chromium } from 'playwright';
-import { mkdir } from 'node:fs/promises';
+import { mkdir, writeFile } from 'node:fs/promises';
 import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { analyzePhoto, visionFailureResponse } from '../src/vision-service.js';
+import { loadVisionCorpus } from '../src/vision-corpus.js';
 
 const output = path.resolve(process.argv[2] || 'release-demo.webm');
 const version = process.env.TIMMY_RELEASE_VERSION || 'review build';
+// The release delta is supplied by the builder so the recording states, on camera, what actually
+// changed in this release instead of implying a feature that did not ship.
+const releaseDelta = process.env.TIMMY_RELEASE_DEMO_DELTA
+  || 'Verified rebuild of the current user-visible feature path — no new feature is claimed.';
+const captionsOut = process.env.TIMMY_DEMO_CAPTIONS_OUT || '';
+const captionsShown = [];
 const sleep = ms => new Promise(resolve => setTimeout(resolve, ms));
 await mkdir(path.dirname(output), { recursive: true });
 
+// The refusal scene replays committed synthetic corpus cases through the real analysis code path,
+// so the recording shows the status and copy the server would actually send rather than copy
+// written for the video. No real photo is used anywhere in the corpus.
+const corpus = await loadVisionCorpus(fileURLToPath(new URL('../tests/fixtures/vision-corpus/', import.meta.url)));
+const corpusCase = id => corpus.cases.find(entry => entry.id === id);
+async function corpusAnalyzeResult(entry) {
+  const fetchImpl = async () => ({ ok: true, json: async () => ({ choices: [{ message: { content: entry.providerContent } }] }) });
+  try {
+    const result = await analyzePhoto({
+      payload: { imageDataUrl: 'data:image/png;base64,YQ==', consent: true },
+      fetchImpl,
+      config: { baseUrl: 'http://127.0.0.1:9/v1', apiKey: 'corpus-replay', model: 'corpus-model' },
+    });
+    return { status: 200, body: result };
+  } catch (error) {
+    const failure = visionFailureResponse(error);
+    return { status: failure.status, body: failure.body };
+  }
+}
+
 const browser = await chromium.launch({ headless: true });
 const context = await browser.newContext({
   viewport: { width: 405, height: 720 },
@@ -19,6 +48,10 @@ const page = await context.newPage();
 const errors = [];
 page.on('console', message => { if (message.type() === 'error') errors.push(message.text()); });
 page.on('pageerror', error => errors.push(error.message));
+let visionOffline = false;
+// Reachable is not loaded: the worker can answer /v1/models before its pinned model is resident,
+// and the recording shows the app withholding AI in exactly that state (issue #15).
+let modelLoaded = true;
 await page.route('**/api/vision-status', route => route.fulfill({
   status: 200,
   contentType: 'application/json',
@@ -27,24 +60,28 @@ await page.route('**/api/vision-status', route => route.fulfill({
     profile: 'selfhost',
     processor: 'self-hosted',
     model: 'SmolVLM2-2.2B-Instruct',
-    providerReady: true,
-    modelSeen: true,
-  }),
-}));
-await page.route('**/api/analyze', route => route.fulfill({
-  status: 200,
-  contentType: 'application/json',
-  body: JSON.stringify({
-    status: 'suggestion',
-    isStool: true,
-    bristolType: 4,
-    color: 'brown',
-    confidence: 0.83,
-    imageQuality: 'good',
-    observations: 'Smooth, formed appearance.',
-    warning: 'Visual suggestion only. Confirm it yourself; this is not a diagnosis.',
+    // The second pass flips the app's own readiness contract so no AI control is offered at all.
+    providerReady: !visionOffline,
+    modelSeen: !visionOffline && modelLoaded,
   }),
 }));
+// The happy path keeps one deterministic suggestion. The refusal scene swaps this for a real
+// corpus replay, so both the usable and the refused answers come from the same code path.
+const suggestionBody = {
+  status: 'suggestion',
+  isStool: true,
+  bristolType: 4,
+  color: 'brown',
+  confidence: 0.83,
+  imageQuality: 'good',
+  observations: 'Smooth, formed appearance.',
+  warning: 'Visual suggestion only. Confirm it yourself; this is not a diagnosis.',
+};
+let analyzeOverride = null;
+await page.route('**/api/analyze', route => {
+  const response = analyzeOverride || { status: 200, body: suggestionBody };
+  return route.fulfill({ status: response.status, contentType: 'application/json', body: JSON.stringify(response.body) });
+});
 await page.route('**/api/agent/status', route => route.fulfill({
   status: 200,
   contentType: 'application/json',
@@ -69,6 +106,7 @@ await page.addStyleTag({ content: `
 ` });
 
 async function caption(text, duration = 1400) {
+  captionsShown.push(text);
   await page.evaluate(text => {
     document.querySelector('#demo-caption')?.remove();
     const node = document.createElement('div');
@@ -78,6 +116,16 @@ async function caption(text, duration = 1400) {
     node.animate([{ opacity: 0, transform: 'translateY(-8px)' }, { opacity: 1, transform: 'translateY(0)' }], { duration: 260, fill: 'forwards' });
   }, text);
   await sleep(duration);
+  // A caption must not outlive its stated duration. It used to stay on screen until the next one
+  // replaced it, so a view change left the previous screen's claim hanging over a different screen —
+  // e.g. a delete-data caption sitting on top of the home view.
+  await page.evaluate(() => {
+    const node = document.querySelector('#demo-caption');
+    if (!node) return;
+    node.animate([{ opacity: 1 }, { opacity: 0 }], { duration: 180, fill: 'forwards' });
+    setTimeout(() => node.remove(), 220);
+  });
+  await sleep(220);
 }
 
 async function tap(selector, after = 650) {
@@ -100,21 +148,231 @@ async function tap(selector, after = 650) {
   await sleep(after);
 }
 
-await caption(`TIMMY ${version} • FEATURE DEMO`, 1200);
+async function indicate(selector) {
+  const target = page.locator(selector).first();
+  await target.scrollIntoViewIfNeeded();
+  const box = await target.boundingBox();
+  if (!box) throw new Error(`Missing demo target: ${selector}`);
+  await page.evaluate(({ x, y }) => {
+    document.querySelector('#demo-touch')?.remove();
+    const ring = document.createElement('div');
+    ring.id = 'demo-touch';
+    ring.style.left = `${x}px`;
+    ring.style.top = `${y}px`;
+    document.body.append(ring);
+    ring.animate([{ opacity: .2, transform: 'translate(-50%,-50%) scale(.55)' }, { opacity: 1, transform: 'translate(-50%,-50%) scale(1)' }], { duration: 400 });
+    setTimeout(() => ring.remove(), 550);
+  }, { x: box.x + box.width / 2, y: box.y + box.height / 2 });
+  await sleep(650);
+}
+
+await caption(`TIMMY ${version} • RELEASE DEMO`, 1200);
+await caption(`This release: ${releaseDelta}`, 2600);
 await caption('Automated checks replay this synthetic path before review', 1200);
 await caption('One clear photo action. Manual logging stays one tap away.', 1500);
 await tap('[data-scan]', 450);
 await page.getByText(/Self-hosted model ready/i).waitFor();
 await caption('The pinned bootstrap verifies both model files before starting on private loopback', 1500);
-await page.locator('#ai-photo').setInputFiles('tests/fixtures/synthetic-type4.jpg');
+await indicate('label[for="camera-photo"]');
+await page.locator('#camera-photo').dispatchEvent('cancel');
+await page.getByText(/Camera or photo picker closed/i).waitFor();
+await caption('Camera closed cleanly — gallery and manual logging are still available', 1600);
+await indicate('label[for="gallery-photo"]');
+await page.locator('#gallery-photo').setInputFiles('tests/fixtures/synthetic-type4.jpg');
 await caption('Nothing uploads until explicit consent', 1100);
 await page.locator('#ai-consent').check();
 await tap('#analyze-photo', 450);
 await page.getByText(/83% confidence/i).waitFor();
 await caption('AI may suggest visible form, broad color, and image quality — never symptoms or diagnosis', 1700);
+await indicate('.scan-result[data-provenance="pending"]');
+await caption('The suggestion stays provisional — nothing is applied or saved until you confirm it', 1700);
 await tap('#use-suggestion', 450);
-await caption('The user reviews every suggestion before saving', 1100);
+await page.locator('.ai-provenance[data-provenance="confirmed"]').waitFor();
+await caption('Confirming is explicit, and every suggested value is still yours to overrule', 1600);
+await tap('[data-type="2"]', 500);
+await page.locator('[data-provenance="corrected"]').waitFor();
+await caption('Change a suggested value and Timmy clears the AI-confirmed state', 1700);
+await indicate('.ai-provenance[data-provenance="corrected"] .provenance-note');
+await tap('#next', 450);
+await page.getByText(/You changed it to Type 2/).waitFor();
+await caption('Only visible form and color were ever suggested — urgency, discomfort, and symptoms stay yours', 1900);
+await tap('#next', 450);
+await page.locator('[data-followup-block]').waitFor();
+await caption('Type 2 is hard or lumpy, so Timmy asks about soreness, hydration, blood, and black-or-tarry — never guessed from the photo', 2600);
+await page.locator('[data-question="bloodVisible"]').scrollIntoViewIfNeeded();
+await indicate('[data-question="bloodVisible"]');
+await tap('[data-followup="bloodVisible"][data-answer="no"]', 400);
+await caption('Every answer is yours to give, and a skipped question stays unanswered', 1900);
+await tap('[data-followup="soreness"][data-answer="yes"]', 350);
+await tap('[data-followup="dehydration"][data-answer="yes"]', 350);
+await page.locator('#followup-guidance').waitFor();
+await caption('Mild report: steady water, no straining, gentle care — general self-care, not a diagnosis', 2600);
+await indicate('#followup-guidance');
+await caption('And it never claims the photo ruled out bleeding', 1900);
+await tap('[data-followup="tarryBlack"][data-answer="yes"]', 600);
+await page.locator('#urgent-box .alert').waitFor();
+await caption('Say it was truly black and tarry and the same deterministic red-flag path fires instead', 2600);
+await tap('[data-followup="tarryBlack"][data-answer="no"]', 500);
+await page.locator('#urgent-box .alert').waitFor({ state: 'detached' });
+await caption('Dark brown is not silently escalated, and the flag clears the moment the answer changes', 2200);
 await tap('#close-sheet', 450);
+await caption('Closing the log keeps the draft in this session instead of throwing it away', 1600);
+await caption('Now the same photo flow while the vision worker is offline', 1500);
+visionOffline = true;
+await tap('[data-scan]', 550);
+await page.getByText(/Vision worker offline/i).waitFor();
+await caption('Vision worker offline — the AI and consent steps disappear instead of failing after upload', 1900);
+await indicate('label[for="gallery-photo"]');
+await page.locator('#gallery-photo').setInputFiles('tests/fixtures/synthetic-type4.jpg');
+await page.getByText(/Ready for your review/i).waitFor();
+await caption('No consent prompt and no upload when analysis cannot run', 1600);
+await tap('#manual-from-scan', 500);
+const keptDraft = await page.locator('.draft-resume').innerText({ timeout: 5000 });
+if (!/Type 2/.test(keptDraft)) throw new Error('The retained draft must show the value the user corrected to');
+await caption('One tap still reaches manual Bristol entry, and the draft keeps your corrected value', 1800);
+await tap('#discard-draft', 500);
+await caption('Start over clears the kept draft — nothing lingers silently', 1500);
+await tap('#close-sheet', 450);
+
+// Post-load readiness pass (issue #15): the worker answers, but its pinned model is not resident
+// yet. The app must withhold AI instead of offering a control that fails after the upload. Every
+// claim below is asserted in the browser, so the recording cannot show a state the app does not have.
+modelLoaded = false;
+visionOffline = false;
+await caption('Now the same worker while its pinned model is still loading', 1700);
+await tap('[data-scan]', 550);
+await page.getByText(/model is not loaded yet/i).first().waitFor();
+if (await page.getByText(/Self-hosted model ready/i).count() !== 0) {
+  throw new Error('A reachable worker without its loaded model must never be reported ready');
+}
+const loadingAmber = await page.locator('.model-status.loading').first().evaluate(el => getComputedStyle(el).backgroundColor);
+if (loadingAmber !== 'rgb(253, 243, 216)') throw new Error('The not-loaded state must be visually distinct from ready and offline');
+await page.locator('#gallery-photo').setInputFiles('tests/fixtures/synthetic-type4.jpg');
+await page.getByText(/Ready for your review/i).waitFor();
+if (await page.locator('#analyze-photo').count() !== 0) throw new Error('No AI control may exist before the model is loaded');
+if (await page.locator('.consent-card').count() !== 0) throw new Error('No consent may be requested before the model is loaded');
+await caption('Reachable is not loaded: no AI control, no consent, and no upload until the pinned model is resident', 2900);
+await tap('#manual-from-scan', 500);
+await page.getByText('Pick the closest form').waitFor();
+await caption('One tap still reaches manual Bristol entry while the model finishes loading', 2000);
+await tap('#close-sheet', 450);
+modelLoaded = true;
+await caption('Once the pinned model is loaded, the same screen offers the AI analysis again', 2200);
+await tap('[data-scan]', 550);
+await page.getByText(/Self-hosted model ready/i).waitFor();
+await page.locator('#gallery-photo').setInputFiles('tests/fixtures/synthetic-type4.jpg');
+await page.getByText(/Ready for your review/i).waitFor();
+if (await page.locator('.consent-card').isVisible() !== true) throw new Error('The AI path must return once the model is loaded');
+if (await page.locator('#analyze-photo').count() !== 1) throw new Error('The analyze control must return once the model is loaded');
+await tap('#close-sheet', 450);
+
+// Corpus refusal pass (issue #18): the same photo flow, fed the answers Timmy has to refuse.
+visionOffline = false;
+await caption('The corpus also replays the answers Timmy has to refuse', 1700);
+analyzeOverride = await corpusAnalyzeResult(corpusCase('non-stool-scene'));
+await tap('[data-scan]', 500);
+await page.getByText(/Self-hosted model ready/i).waitFor();
+await page.locator('#gallery-photo').setInputFiles('tests/fixtures/vision-corpus/non-stool-scene.png');
+await page.locator('#ai-consent').check();
+await tap('#analyze-photo', 600);
+await page.getByText(/No confident match/i).waitFor();
+await caption('A non-stool photo gets a refusal, never a guess — manual entry stays one tap away', 2600);
+await indicate('.scan-result');
+analyzeOverride = await corpusAnalyzeResult(corpusCase('glare-overexposed'));
+await tap('#retake-photo', 400);
+await page.locator('#gallery-photo').setInputFiles('tests/fixtures/vision-corpus/glare-overexposed.png');
+await page.locator('#ai-consent').check();
+await tap('#analyze-photo', 600);
+await page.getByText(/does not show a form Timmy can read safely/i).waitFor();
+await caption('Unreadable visual fields abstain as well: a valid reply with nothing to prefill is not an error', 2700);
+await indicate('.scan-result');
+analyzeOverride = await corpusAnalyzeResult(corpusCase('out-of-range-fields'));
+await tap('#retake-photo', 400);
+await page.locator('#gallery-photo').setInputFiles('tests/fixtures/vision-corpus/out-of-range-fields.png');
+await page.locator('#ai-consent').check();
+await tap('#analyze-photo', 600);
+await page.getByText(/couldn’t analyze that safely/i).waitFor();
+await caption('An out-of-range answer fails closed: nothing is applied and no provider detail reaches you', 2700);
+await indicate('.scan-result');
+// Issue #73's escape class: one field blank, the other filled in and impossible. The old blank-first
+// ordering abstained here, which told the user the photo was unreadable while the model had returned a
+// value Timmy must never apply. The scene is asserted in the browser, not just captioned.
+analyzeOverride = await corpusAnalyzeResult(corpusCase('blank-plus-out-of-range'));
+await tap('#retake-photo', 400);
+await page.locator('#gallery-photo').setInputFiles('tests/fixtures/vision-corpus/blank-plus-out-of-range.png');
+await page.locator('#ai-consent').check();
+await tap('#analyze-photo', 600);
+await page.getByText(/couldn’t analyze that safely/i).waitFor();
+if (await page.getByText(/No confident match/i).count() !== 0) {
+  throw new Error('A filled-in out-of-range field must not be shown as an unreadable-photo abstention');
+}
+await caption('A filled-in field that is out of range still fails closed, even when the other field came back blank', 2900);
+await indicate('.scan-result');
+await caption('You are no longer told the photo was unreadable when the model returned an impossible value', 2400);
+await indicate('.scan-result');
+await caption('Every refusal replays a committed synthetic fixture — there are no real photos in the corpus', 2500);
+analyzeOverride = null;
+await tap('#close-sheet', 450);
+
+// Explainable pattern summary (issue #34). The recording seeds fictional multi-day sample logs into
+// the app's own local ledger contract, then follows one summary line to the exact records behind it.
+// Every claim below is checked in the browser, and no real health data is involved anywhere.
+const seedSyntheticLedger = async entries => {
+  const key = await page.evaluate(() => `timmy:${document.querySelector('meta[name="timmy-base-path"]')?.content || '/'}:ledger-v1`);
+  await page.evaluate(({ storeKey, list }) => localStorage.setItem(storeKey, JSON.stringify(list)), { storeKey: key, list: entries });
+  await page.reload({ waitUntil: 'networkidle' });
+};
+const sampleDay = (id, daysAgo, bristolType) => ({
+  id,
+  occurredAt: new Date(Date.now() - daysAgo * 86400000).toISOString(),
+  bristolType,
+  color: 'brown',
+  urgency: 1,
+  discomfort: 1,
+  note: '',
+  photoDataUrl: '',
+  symptoms: {},
+});
+await caption('The journal explains its own pattern lines instead of just asserting a trend', 2200);
+await seedSyntheticLedger([
+  sampleDay('demo-firm', 2, 2),
+  sampleDay('demo-typical-1', 5, 3),
+  sampleDay('demo-typical-2', 9, 4),
+  sampleDay('demo-typical-3', 12, 4),
+  sampleDay('demo-old', 40, 6),
+]);
+await caption("Fictional sample logs are seeded into this browser's own storage — no real health data appears here", 2600);
+await page.locator('[data-pattern-summary]').waitFor();
+await indicate('[data-pattern-summary]');
+await caption('The summary says which confirmed logs it read, and a citation opens exactly those records', 2400);
+await indicate('[data-statement="typical"]');
+await tap('[data-statement-link="typical"]', 650);
+const citedRecords = await page.locator('[data-summary-record]').evaluateAll(nodes => nodes.map(node => node.getAttribute('data-entry-id')).sort());
+if (JSON.stringify(citedRecords) !== JSON.stringify(['demo-typical-1', 'demo-typical-2', 'demo-typical-3'])) {
+  throw new Error('A summary citation must list exactly the records it cites');
+}
+await caption('Every pattern line names the confirmed logs behind it, and following one shows exactly those records', 2900);
+await indicate('[data-summary-records]');
+await tap('#pattern-records-close', 450);
+await seedSyntheticLedger([sampleDay('demo-sparse-1', 1, 4), sampleDay('demo-sparse-2', 4, 6)]);
+await page.locator('[data-summary-insufficient]').waitFor();
+await indicate('[data-summary-insufficient]');
+await caption('Two logs is not a pattern: the summary refuses to describe a trend it cannot support', 2900);
+// Restore the empty ledger the earlier scenes started from, so the rest of the recording is unchanged.
+await page.evaluate(() => localStorage.clear());
+await page.reload({ waitUntil: 'networkidle' });
+
+await caption('The threat model documents this surface, so the recording shows it live rather than describing it', 2200);
+await tap('[data-view="calendar"]', 550);
+await page.getByText(/Your private journal/i).waitFor();
+await tap('[data-view="privacy"]', 550);
+await page.getByText(/Your poop\. Your phone\./i).waitFor();
+await caption('Every byte-bearing control the model names, in the running app: local ledger, consent-gated upload, portable export, full deletion', 2800);
+await indicate('#export');
+await caption('Export writes a plain JSON file you hold — the model records it as a data-lifetime boundary, not a server sync', 2600);
+await indicate('#delete-all');
+await caption('Delete all local data clears the ledger in this browser; there is no server copy of it to keep', 2600);
+await tap('[data-view="home"]', 500);
 await tap('[data-view="timmy"]', 550);
 await page.getByText(/Hermes Agent connected/i).waitFor();
 await caption('Hermes Agent connected — free-text, contextual, and server-side', 1400);
@@ -127,6 +385,44 @@ await tap('#send-chat', 450);
 await page.getByText(/Pause and get medical help/i).waitFor();
 if (hermesCalls !== 1) throw new Error('Urgent chat must be intercepted before Hermes');
 await caption('Urgent language is intercepted deterministically before Hermes', 1800);
+
+// Issue #21 — the escalation has to fire for the phrasing people actually use, not only for the one
+// word the previous scene typed. Each line below is asserted in the browser: exactly one new Timmy
+// bubble, carrying the app's own fixed copy, with hermesCalls unmoved.
+const escalationBubbles = () => page.locator('.bubble.timmy', { hasText: 'Pause and get medical help' }).count();
+const expectEscalation = async (text, label) => {
+  const before = await escalationBubbles();
+  await page.locator('#chat-message').fill(text);
+  await tap('#send-chat', 450);
+  const bubble = page.locator('.bubble.timmy', { hasText: 'Pause and get medical help' }).last();
+  await bubble.waitFor();
+  if (await escalationBubbles() !== before + 1) throw new Error(`${label}: expected exactly one escalation bubble`);
+  if (!/^Pause and get medical help\. These reported symptoms can need prompt medical care\./.test(await bubble.innerText())) {
+    throw new Error(`${label}: the escalation copy must be the app's own fixed string`);
+  }
+  if (hermesCalls !== 1) throw new Error(`${label}: an escalated turn must not reach Hermes`);
+};
+await expectEscalation('There is blood when I wipe', 'bleeding reported as wiping');
+await caption('Bleeding reported as wiping still escalates, in the app’s own fixed words', 2600);
+await expectEscalation('I have tarry stools', 'tarry stool');
+await caption('Tarry and black stool wording escalates too: one red flag, one unchanging message', 2600);
+
+// The same detector runs over the confirmed ledger, so a symptom already written down as a note
+// escalates even when the question itself is innocuous. The seeded entry is fictional and stays in
+// this browser, exactly like the summary scene above.
+await page.evaluate(() => localStorage.clear());
+await seedSyntheticLedger([{ ...sampleDay('demo-tarry-note', 1, 4), note: 'stool was tarry yesterday' }]);
+await tap('[data-view="timmy"]', 550);
+const ledgerEscalations = await escalationBubbles();
+await page.locator('#chat-message').fill('What do my recent logs show?');
+await tap('#send-chat', 450);
+await page.locator('.bubble.timmy', { hasText: 'Pause and get medical help' }).last().waitFor();
+if (await escalationBubbles() !== ledgerEscalations + 1) throw new Error('a tarry note in the journal must escalate the next answer');
+if (hermesCalls !== 1) throw new Error('a ledger red flag must be intercepted before Hermes');
+await caption('A tarry note already saved in the journal escalates the same way, before any provider call', 2800);
+await page.evaluate(() => localStorage.clear());
+await page.reload({ waitUntil: 'networkidle' });
+await tap('[data-view="timmy"]', 500);
 await sleep(400);
 await page.evaluate(() => {
   document.querySelector('#demo-caption')?.remove();
@@ -142,7 +438,19 @@ await page.evaluate(() => {
 });
 await sleep(2200);
 
-if (errors.length) throw new Error(`Browser errors: ${errors.join(' | ')}`);
+// The refusal pass deliberately produces two fail-closed 503s (an out-of-range reply, and one blank field
+// beside an out-of-range one), which the browser logs as failed resources. Requiring exactly those two
+// keeps the scene honest: if the boundary stops refusing, this fails instead of quietly recording a happy
+// path, and a dropped scene is caught rather than silently shrinking the evidence.
+const expectedFailClosed = errors.filter(message => /Failed to load resource: the server responded with a status of 503 \(Service Unavailable\)/.test(message));
+if (expectedFailClosed.length !== 2 || errors.length !== expectedFailClosed.length) {
+  throw new Error(`Browser errors: ${errors.join(' | ') || 'unexpected error count'}`);
+}
+// Machine-readable receipt of exactly what was rendered on camera, so the release gate can prove
+// the recorded delta statement reached the screen instead of trusting the script source.
+if (captionsOut) {
+  await writeFile(captionsOut, JSON.stringify({ version, releaseDelta, captions: captionsShown }, null, 2) + '\n', 'utf8');
+}
 const recording = page.video();
 await page.close();
 await recording.saveAs(output);

scripts/record_worker_benchmark.mjs

@@ -0,0 +1,161 @@
+#!/usr/bin/env node
+// Record the target-GPU cost of the pinned worker (issue #15).
+//
+// This script measures; it never invents. If no GPU can be probed, if the pinned model is not
+// loaded, or if the cold start cannot be observed, it exits non-zero and writes no receipt at all,
+// because a receipt with zeroed or assumed numbers is worse than no receipt.
+import { spawn } from 'node:child_process';
+import { readFile, writeFile } from 'node:fs/promises';
+import { fileURLToPath } from 'node:url';
+import path from 'node:path';
+
+const LOOPBACK = /^(127\.0\.0\.1|localhost|::1)$/;
+
+function parseArgs(argv) {
+  const options = {
+    out: '',
+    host: '127.0.0.1',
+    port: '8080',
+    alias: 'SmolVLM2-2.2B-Instruct',
+    gpuProbe: 'nvidia-smi',
+    warmSamples: 20,
+    startCommand: '',
+    readyTimeoutSeconds: 900,
+  };
+  for (let index = 0; index < argv.length; index += 1) {
+    const [flag, inline] = argv[index].split('=');
+    const value = inline ?? argv[index + 1];
+    const consume = inline === undefined ? 2 : 1;
+    if (flag === '--out') options.out = value;
+    else if (flag === '--host') options.host = value;
+    else if (flag === '--port') options.port = value;
+    else if (flag === '--alias') options.alias = value;
+    else if (flag === '--gpu-probe') options.gpuProbe = value;
+    else if (flag === '--warm-samples') options.warmSamples = Number(value);
+    else if (flag === '--start-command') options.startCommand = value;
+    else if (flag === '--ready-timeout') options.readyTimeoutSeconds = Number(value);
+    else fail(`Unknown argument: ${flag}`);
+    index += consume - 1;
+  }
+  return options;
+}
+
+function fail(message, code = 64) {
+  process.stderr.write(`${message}\n`);
+  process.exit(code);
+}
+
+const reject = message => {
+  process.stderr.write(`${message}\n`);
+  process.exit(1);
+};
+
+const sleep = ms => new Promise(resolve => setTimeout(resolve, ms));
+
+async function modelsServed({ host, port, alias }) {
+  try {
+    const response = await fetch(`http://${host}:${port}/v1/models`, { signal: AbortSignal.timeout(3000) });
+    if (!response.ok) return false;
+    const body = await response.json();
+    const ids = Array.isArray(body?.data) ? body.data.map(item => item?.id).filter(Boolean) : [];
+    return ids.some(id => id === alias || id.includes(alias));
+  } catch {
+    return false;
+  }
+}
+
+function runCommand(command, args) {
+  return new Promise(resolve => {
+    const child = spawn(command, args, { stdio: ['ignore', 'pipe', 'pipe'] });
+    let stdout = '';
+    let stderr = '';
+    child.stdout.on('data', chunk => { stdout += chunk; });
+    child.stderr.on('data', chunk => { stderr += chunk; });
+    child.on('error', error => resolve({ code: 127, stdout, stderr: String(error.message) }));
+    child.on('close', code => resolve({ code, stdout, stderr }));
+  });
+}
+
+async function probeGpu(probeCommand) {
+  const result = await runCommand(probeCommand, [
+    '--query-gpu=name,memory.total,memory.used',
+    '--format=csv,noheader,nounits',
+  ]);
+  if (result.code !== 0) {
+    reject(`No GPU could be probed with ${probeCommand}: ${result.stderr.trim() || `exit ${result.code}`}. A benchmark receipt needs a real device, so nothing was written.`);
+  }
+  const [name, total, used] = result.stdout.trim().split('\n')[0].split(',').map(part => part.trim());
+  if (!name || !/^\d+$/.test(total) || !/^\d+$/.test(used)) {
+    reject(`The GPU probe returned unreadable output (${JSON.stringify(result.stdout.trim())}); refusing to record VRAM it cannot read.`);
+  }
+  return { name, vramTotalMiB: Number(total), vramUsedMiB: Number(used) };
+}
+
+function percentile(sorted, fraction) {
+  const index = Math.min(sorted.length - 1, Math.max(0, Math.ceil(fraction * sorted.length) - 1));
+  return sorted[index];
+}
+
+const options = parseArgs(process.argv.slice(2));
+if (!options.out) fail('--out is required so the receipt has a destination');
+if (!LOOPBACK.test(options.host)) fail(`The worker is a loopback service; refusing to benchmark ${options.host}.`);
+if (!Number.isInteger(options.warmSamples) || options.warmSamples < 1) fail('--warm-samples must be a positive integer');
+
+const receipts = JSON.parse(await readFile(fileURLToPath(new URL('../deploy/worker/receipts.json', import.meta.url)), 'utf8'));
+
+// The device is probed first: nothing is timed until we know the numbers have somewhere to be real.
+const gpu = await probeGpu(options.gpuProbe);
+
+if (!(await modelsServed(options))) {
+  reject(`${options.alias} is not loaded on ${options.host}:${options.port} yet, so there is no ready worker to time. Start the worker and wait for the post-load gate.`);
+}
+
+let coldStartMs = null;
+if (options.startCommand) {
+  const started = Date.now();
+  const started_process = await runCommand('bash', ['-c', options.startCommand]);
+  if (started_process.code !== 0) {
+    reject(`The cold-start command failed (exit ${started_process.code}): ${started_process.stderr.trim()}`);
+  }
+  const deadline = Date.now() + options.readyTimeoutSeconds * 1000;
+  let ready = false;
+  while (Date.now() < deadline) {
+    if (await modelsServed(options)) { ready = true; break; }
+    await sleep(250);
+  }
+  if (!ready) reject(`The worker did not become ready within ${options.readyTimeoutSeconds}s, so the cold start could not be measured.`);
+  coldStartMs = Date.now() - started;
+}
+
+const samples = [];
+for (let index = 0; index < options.warmSamples; index += 1) {
+  const started = process.hrtime.bigint();
+  const ok = await modelsServed(options);
+  const elapsedMs = Number(process.hrtime.bigint() - started) / 1e6;
+  if (!ok) reject('The worker stopped answering during the warm pass; the receipt would be partial, so nothing was written.');
+  samples.push(Math.round(elapsedMs * 1000) / 1000);
+}
+const sorted = [...samples].sort((left, right) => left - right);
+
+const receipt = {
+  schemaVersion: 1,
+  status: 'measured_on_target_gpu',
+  measuredAt: new Date().toISOString(),
+  gpu,
+  coldStartMs,
+  warmLatencyMs: {
+    samples: sorted.length,
+    min: sorted[0],
+    p50: percentile(sorted, 0.5),
+    p95: percentile(sorted, 0.95),
+    max: sorted[sorted.length - 1],
+  },
+  worker: { baseUrl: `http://${options.host}:${options.port}/v1`, alias: options.alias },
+  pins: {
+    llamaCppCommit: receipts.llamaCpp.commit,
+    modelSha256: receipts.models.map(model => model.sha256),
+  },
+};
+
+await writeFile(path.resolve(options.out), `${JSON.stringify(receipt, null, 2)}\n`, 'utf8');
+process.stdout.write(`${path.resolve(options.out)}\n`);

scripts/worker_ready.sh

@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+# Post-load readiness gate for Timmy's self-hosted vision worker (issue #15).
+#
+# A worker that answers on its port is not necessarily a worker that can answer: llama.cpp opens
+# its HTTP listener before the model finishes loading and returns an error until the weights are
+# resident. Readiness therefore passes only when the pinned model alias is actually served.
+#
+# Exit codes:
+#   0  ready — the pinned model is loaded and being served
+#   2  the worker is not reachable
+#   3  the worker is reachable but the pinned model is not loaded yet
+#  64  usage error (including a non-loopback probe host)
+set -uo pipefail
+
+HOST="${TIMMY_MODEL_HOST:-127.0.0.1}"
+PORT="${TIMMY_MODEL_PORT:-8080}"
+ALIAS="${TIMMY_MODEL_ALIAS:-SmolVLM2-2.2B-Instruct}"
+WAIT=0
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --host) HOST="${2:-}"; shift 2 ;;
+    --port) PORT="${2:-}"; shift 2 ;;
+    --alias) ALIAS="${2:-}"; shift 2 ;;
+    --wait) WAIT="${2:-}"; shift 2 ;;
+    *)
+      printf 'Usage: %s [--host H] [--port P] [--alias A] [--wait SECONDS]\n' "$0" >&2
+      exit 64
+      ;;
+  esac
+done
+
+# The worker is a private, loopback-only service. Probing anything else would be a mistake about
+# exposure, so refuse rather than answer about a host this gate is not responsible for.
+if [[ ! "$HOST" =~ ^(127\.0\.0\.1|localhost|::1)$ ]]; then
+  printf 'Readiness must be probed on loopback, got %s\n' "$HOST" >&2
+  exit 64
+fi
+
+deadline=$(( $(date +%s) + WAIT ))
+outcome='unreachable'
+while :; do
+  body="$(curl --silent --max-time 3 "http://$HOST:$PORT/v1/models" 2>/dev/null)"
+  if [[ $? -eq 0 && -n "$body" ]]; then
+    if printf '%s' "$body" | grep -q -- "$ALIAS"; then
+      printf 'Worker ready: %s is loaded on http://%s:%s/v1\n' "$ALIAS" "$HOST" "$PORT"
+      exit 0
+    fi
+    outcome='not-loaded'
+    printf 'Worker reachable on http://%s:%s/v1 but %s is not loaded yet.\n' "$HOST" "$PORT" "$ALIAS" >&2
+  else
+    outcome='unreachable'
+    printf 'Worker not reachable on http://%s:%s/v1.\n' "$HOST" "$PORT" >&2
+  fi
+  [[ "$(date +%s)" -ge "$deadline" ]] && break
+  sleep 1
+done
+
+[[ "$outcome" == 'not-loaded' ]] && exit 3
+exit 2

server.mjs

@@ -3,7 +3,7 @@ import { isIP } from 'node:net';
 import { readFile, stat } from 'node:fs/promises';
 import { extname, join, normalize } from 'node:path';
 import { fileURLToPath } from 'node:url';
-import { analyzePhoto } from './src/vision-service.js';
+import { analyzePhoto, visionFailureResponse } from './src/vision-service.js';
 import { probeVisionProvider, resolveVisionConfig } from './src/vision-config.js';
 import { AgentGatewayError, createHermesAgentService, resolveHermesAgentConfig } from './src/hermes-agent-service.js';
 
@@ -39,34 +39,6 @@ function rejectCrossSite(req){const site=String(req.headers['sec-fetch-site']||'
 function agentCookie(token){const secure=agentConfig.publicOrigin.startsWith('https://')?'; Secure':'';return `timmy_agent=${encodeURIComponent(token)}; HttpOnly; SameSite=Strict; Path=${appRoot}; Max-Age=86400${secure}`}
 function sendAgentError(res,error){const status=error instanceof AgentGatewayError?error.status:503;const message=error instanceof AgentGatewayError?error.message:'Hermes is temporarily unavailable. Your local journal still works.';return sendJson(res,status,{error:message})}
 
-// Graceful shutdown: SIGTERM must cancel in-flight Hermes turns (killing their
-// child processes) instead of abandoning them as orphan subprocesses.
-const inFlightChats = new Set();
-let shuttingDown = false;
-function trackChat(res, controller) {
-  if (shuttingDown) controller.abort(new Error('Timmy is shutting down. Your journal still works — try again shortly.'));
-  const entry = { res, controller };
-  inFlightChats.add(entry);
-  // A vanished client must release its queue slot and stop any in-flight
-  // Hermes turn instead of consuming inference capacity silently.
-  res.on('close', () => {
-    inFlightChats.delete(entry);
-    if (!res.writableEnded) {
-      try { controller.abort(new Error('The browser closed the request. Your journal still works.')); } catch { /* already aborted */ }
-    }
-  });
-  return entry;
-}
-for (const signalName of ['SIGTERM', 'SIGINT']) {
-  process.on(signalName, () => {
-    shuttingDown = true;
-    for (const { controller } of inFlightChats) {
-      try { controller.abort(new Error('Server is shutting down.')); } catch { /* already aborted */ }
-    }
-    process.exit(0);
-  });
-}
-
 http.createServer(async(req,res)=>{
  try{
   const url=new URL(req.url,'http://localhost');
@@ -83,14 +55,14 @@ http.createServer(async(req,res)=>{
    if(!visionConfig.enabled)return sendJson(res,503,{error:'AI analysis is disabled. Continue manually.'});
    const payload=await readJson(req);
    try{return sendJson(res,200,await analyzePhoto({payload,config:visionConfig}))}
-   catch(error){const safe=/consent|JPEG|PNG|WebP|empty|too large/i.test(error.message);return sendJson(res,safe?400:503,{error:error.message})}
+   catch(error){const failure=visionFailureResponse(error);return sendJson(res,failure.status,failure.body)}
   }
   if(appPath==='/api/agent/status'&&req.method==='GET')return sendJson(res,200,agentService.status(cookie(req,'timmy_agent')));
   if(appPath==='/api/agent/unlock'&&req.method==='POST'){
    try{rejectCrossSite(req);const payload=await readJson(req,4096);const result=await agentService.unlock({origin:requestOrigin(req),accessCode:String(payload?.accessCode||'')});res.setHeader('set-cookie',agentCookie(result.cookieToken));return sendJson(res,200,result.public)}catch(error){return sendAgentError(res,error)}
   }
   if(appPath==='/api/agent/chat'&&req.method==='POST'){
-   try{rejectCrossSite(req);const payload=await readJson(req,128*1024);const chatAbort=new AbortController();trackChat(res,chatAbort);return sendJson(res,200,await agentService.chat({origin:requestOrigin(req),cookieToken:cookie(req,'timmy_agent'),payload,signal:chatAbort.signal}))}catch(error){return sendAgentError(res,error)}
+   try{rejectCrossSite(req);const payload=await readJson(req,128*1024);return sendJson(res,200,await agentService.chat({origin:requestOrigin(req),cookieToken:cookie(req,'timmy_agent'),payload}))}catch(error){return sendAgentError(res,error)}
   }
   if(appPath.startsWith('/api/'))return sendJson(res,404,{error:'Not found'});
   if(req.method!=='GET'&&req.method!=='HEAD'){res.writeHead(405,{'allow':'GET, HEAD'});return res.end()}

service-worker.js

@@ -37,7 +37,10 @@ self.addEventListener('fetch', event => {
   event.respondWith(
     fetch(event.request)
       .then(response => {
-        if (!/\bno-store\b/i.test(response.headers.get('cache-control') || '')) {
+        const cacheControl = response.headers.get('cache-control') || '';
+        const contentType = response.headers.get('content-type') || '';
+        // Never persist photo or image bodies: a private photo must stay a transient upload.
+        if (!/\bno-store\b/i.test(cacheControl) && !/^\s*image\//i.test(contentType)) {
           const copy = response.clone();
           caches.open(CACHE).then(cache => cache.put(event.request, copy));
         }

src/analysis.js

@@ -2,32 +2,60 @@ const COLORS = new Set(['brown', 'green', 'yellow', 'pale', 'red', 'black']);
 const QUALITIES = new Set(['good', 'fair', 'poor']);
 const MAX_IMAGE_BYTES = 4 * 1024 * 1024;
 
+// Fail-closed responses carry a code so the server boundary and the corpus can name the failure
+// class without matching on prose.
+export const VISION_FAILURE_CODES = Object.freeze({ invalidJson: 'invalid_json', invalidFields: 'invalid_fields' });
+
+function visionResponseError(code, message) {
+  const error = new Error(message);
+  error.name = 'VisionResponseError';
+  error.code = code;
+  return error;
+}
+
 function asObject(raw) {
   if (raw && typeof raw === 'object' && !Array.isArray(raw)) return raw;
-  if (typeof raw !== 'string') throw new Error('Invalid AI response.');
+  if (typeof raw !== 'string') throw visionResponseError(VISION_FAILURE_CODES.invalidJson, 'Invalid AI response.');
   const cleaned = raw.trim().replace(/^```(?:json)?\s*/i, '').replace(/\s*```$/, '');
   try {
     const parsed = JSON.parse(cleaned);
     if (!parsed || typeof parsed !== 'object' || Array.isArray(parsed)) throw new Error();
     return parsed;
   } catch {
-    throw new Error('Invalid AI response.');
+    throw visionResponseError(VISION_FAILURE_CODES.invalidJson, 'Invalid AI response.');
   }
 }
 
 export function parseVisionResponse(raw) {
   const value = asObject(raw);
-  if (typeof value.isStool !== 'boolean') throw new Error('Invalid AI response: isStool is required.');
+  if (typeof value.isStool !== 'boolean') throw visionResponseError(VISION_FAILURE_CODES.invalidFields, 'Invalid AI response: isStool is required.');
   const confidence = Number(value.confidence);
-  if (!Number.isFinite(confidence) || confidence < 0 || confidence > 1) throw new Error('Invalid AI response: confidence is required.');
-  if (!value.isStool) return { status: 'needs_user_input', isStool: false, reason: 'The image does not clearly show stool.' };
-  if (confidence < 0.55) return { status: 'needs_user_input', isStool: true, reason: 'The image is too uncertain to prefill safely.' };
-  const bristolType = Number(value.bristolType);
-  const color = String(value.color || '').toLowerCase();
-  const imageQuality = String(value.imageQuality || '').toLowerCase();
-  if (!Number.isInteger(bristolType) || bristolType < 1 || bristolType > 7 || !COLORS.has(color) || !QUALITIES.has(imageQuality)) {
-    throw new Error('Invalid AI response: visual fields are out of range.');
+  if (!Number.isFinite(confidence) || confidence < 0 || confidence > 1) throw visionResponseError(VISION_FAILURE_CODES.invalidFields, 'Invalid AI response: confidence is required.');
+  if (!value.isStool) return { status: 'needs_user_input', isStool: false, abstainedFor: 'not_stool', reason: 'The image does not clearly show stool.' };
+  if (confidence < 0.55) return { status: 'needs_user_input', isStool: true, abstainedFor: 'low_confidence', reason: 'The image is too uncertain to prefill safely.' };
+  // The request schema lets the model return a null form and color when it cannot read them.
+  // A blank field means the model could not read it, so a schema-valid answer with nothing usable
+  // abstains and nothing is prefilled. A filled-in field is a claim, though: if it sits outside the
+  // contract the response fails closed, even when the other field is blank (#73), because a caller
+  // reading `unusable_visual_fields` would be told the photo was unreadable when the model had in
+  // fact returned an impossible value.
+  const blank = input => input === null || input === undefined || (typeof input === 'string' && !input.trim());
+  const bristolType = blank(value.bristolType) ? null : Number(value.bristolType);
+  const color = blank(value.color) ? null : String(value.color).toLowerCase();
+  if ((bristolType !== null && (!Number.isInteger(bristolType) || bristolType < 1 || bristolType > 7))
+    || (color !== null && !COLORS.has(color))) {
+    throw visionResponseError(VISION_FAILURE_CODES.invalidFields, 'Invalid AI response: visual fields are out of range.');
   }
+  if (bristolType === null || color === null) {
+    return {
+      status: 'needs_user_input',
+      isStool: true,
+      abstainedFor: 'unusable_visual_fields',
+      reason: 'The photo does not show a form Timmy can read safely.',
+    };
+  }
+  const imageQuality = String(value.imageQuality || '').toLowerCase();
+  if (!QUALITIES.has(imageQuality)) throw visionResponseError(VISION_FAILURE_CODES.invalidFields, 'Invalid AI response: visual fields are out of range.');
   return {
     status: 'suggestion',
     isStool: true,

src/domain.js

@@ -1,14 +1,58 @@
 const URGENT_KEYS = ['blood', 'blackOrDarkRed', 'severePain', 'vomiting', 'fever', 'cannotPassGas'];
 const URGENT_MESSAGE = 'These reported symptoms can need prompt medical care. Contact a clinician or urgent service now; call emergency services for heavy or nonstop bleeding, fainting, or severe worsening symptoms.';
+// Bleeding is reported in more shapes than "blood in my stool": wiping, toilet paper, or the
+// anatomy word the person actually uses. Each alternative still requires a bowel or wiping
+// context, and the near-miss wording that must stay quiet ("a paper cut", "blood pressure")
+// is pinned in tests/escalation-regression.test.js.
+const BLEEDING_TEXT = new RegExp(`\\b(?:${[
+  'rectal bleeding',
+  'bleeding from (?:the )?(?:rectum|bottom|back passage|anus)',
+  '(?:blood|bleeding)\\b[^.!?]{0,30}\\b(?:when i wipe|when wiping|on (?:the )?toilet paper)',
+  '(?:blood|bleeding)\\b[^.!?]{0,20}\\b(?:from|in|out of) (?:my|the) (?:bottom|rectum|back passage|anus)',
+  '(?:blood|bleeding)\\b[^.!?]{0,20}\\b(?:in|mixed (?:in|into)) (?:my |the )?(?:poo|poop|stool|bowel movement)',
+  '(?:diarrh(?:ea|oea)|loose stools?)\\b[^.!?]{0,15}\\bwith blood',
+  'blood(?:y)? (?:in|on|with) (?:my |the )?(?:poo|poop|stool|bowel movement)',
+  '(?:stool|poop|poo) (?:has|contains|with) blood',
+].join('|')})\\b`, 'i');
 const URGENT_TEXT_PATTERNS = Object.freeze([
-  ['blood', /\b(?:rectal bleeding|bleeding from (?:the )?(?:rectum|bottom)|blood(?:y)? (?:in|on|with) (?:my |the )?(?:stool|poop|bowel movement)|(?:stool|poop) (?:has|contains|with) blood)\b/i],
-  ['blackOrDarkRed', /\b(?:(?:black|dark[- ]?red) (?:stool|poop|bowel movement)|(?:stool|poop|bowel movement) (?:is|looks?) (?:black|dark[- ]?red))s?\b/i],
-  ['severePain', /\b(?:severe|constant|unrelenting) (?:abdominal|stomach|belly) pain\b/i],
+  ['blood', BLEEDING_TEXT],
+  ['blackOrDarkRed', new RegExp(`\\b(?:${[
+    '(?:black|dark[- ]?red|tarry) (?:stool|stools|poop|poo|bowel movement|bathroom visit)s?',
+    '(?:stool|stools|poop|poo|bowel movement) (?:is|are|was|were|looks?|looked|seems?|came out) (?:very |pitch )?(?:black|dark[- ]?red|tarry)',
+    '(?:stool|stools|poop|poo) (?:that )?looks? like tar',
+    'black[^.!?]{0,15}\\btarry',
+  ].join('|')})\\b`, 'i')],
+  ['severePain', new RegExp(`\\b(?:${[
+    '(?:severe|constant|unrelenting|unbearable|worst) (?:abdominal|stomach|belly|tummy|abdomen|gut) pain',
+    '(?:abdominal|stomach|belly|tummy|abdomen|gut)[^.!?]{0,20}\\bpain\\b[^.!?]{0,20}\\b(?:severe|constant|unrelenting|unbearable|worse)\\b',
+    '(?:severe|constant|unrelenting|unbearable|worst)\\b[^.!?]{0,40}\\bpain\\b[^.!?]{0,40}\\b(?:abdominal|stomach|belly|tummy|abdomen|gut)\\b',
+    '\\bpain\\b[^.!?]{0,25}\\b(?:abdominal|stomach|belly|tummy|abdomen|gut)\\b[^.!?]{0,25}\\b(?:severe|constant|unrelenting|unbearable|worse)\\b',
+  ].join('|')})\\b`, 'i')],
   ['vomiting', /\b(?:vomit(?:ing|ed|s)?|throw(?:ing|s)? up|threw up|thrown up|puk(?:e|ed|ing|es)|barf(?:ed|ing|s)?|upchuck(?:ed|ing|s)?|toss(?:ed|ing|es)? (?:my|your|his|her|our|their|the) cookies|los(?:e|t|ing|es) (?:my|your|his|her|our|their|the) lunch|(?:i|we|you|he|she|they|someone) (?:(?:have|had|just|already|recently|am|are|was|were|kept) )?(?:hurl(?:s|ed|ing)?|spew(?:s|ed|ing)?)(?=\s*(?:[.!?]|$|again\b|twice\b|all night\b))|emesis)\b/i],
-  ['fever', /\bfever(?:ish)?\b/i],
-  ['cannotPassGas', /\b(?:cannot|can['’]?t|cant|unable to|not able to) pass gas\b/i],
+  ['fever', new RegExp(`\\b(?:${[
+    'fever(?:ish)?',
+    'running a (?:high )?temperature',
+    'high temperature',
+    '(?:temp|temperature)\\b[^.!?]{0,15}\\b(?:of |is |was |at |hit |reached )?(?:1\\d\\d(?:\\.\\d+)?|3[89](?:\\.\\d+)?|4[01](?:\\.\\d+)?)\\b',
+  ].join('|')})\\b`, 'i')],
+  ['cannotPassGas', new RegExp(`\\b(?:${[
+    "(?:cannot|can['’]?t|cant|unable to|not able to|not|never|stopped|have not|haven['’]?t|did not|didn['’]?t)\\b[^.!?]{0,30}\\bpass(?:ing|ed)? (?:any )?(?:gas|wind|fart)\\b",
+    '\\bno (?:gas|wind)\\b[^.!?]{0,20}\\b(?:passing|passed|coming)\\b',
+    '\\b(?:cannot|can[\'’]?t|not)\\b[^.!?]{0,15}\\bfart(?:ing)?\\b',
+  ].join('|')})\\b`, 'i')],
 ]);
 
+// A reported symptom is a claim. Anything truthy-ish is read as reported; only an explicit clear
+// (false, 0, "no", blank, or absent) is read as not reported. Dropping a value because it was not
+// the literal boolean `true` would silently clear a symptom the person reported, which is the one
+// direction this boundary may never fail in.
+export function isReportedSymptom(value) {
+  if (value === true) return true;
+  if (typeof value === 'number') return value === 1;
+  if (typeof value === 'string') return /^(?:true|yes|y|1)$/i.test(value.trim());
+  return false;
+}
+
 export function bucketForBristolType(type) {
   const value = Number(type);
   if (value === 1 || value === 2) return 'constipation';
@@ -18,7 +62,7 @@ export function bucketForBristolType(type) {
 }
 
 export function detectUrgentFlags(symptoms = {}) {
-  const flags = URGENT_KEYS.filter((key) => symptoms[key] === true);
+  const flags = URGENT_KEYS.filter((key) => isReportedSymptom(symptoms[key]));
   return {
     urgent: flags.length > 0,
     flags,

src/draft.js

@@ -0,0 +1,39 @@
+// A draft is what the user has entered but not yet saved.
+// It is kept in this browser only, so a recoverable close or navigation never loses it.
+export function createDraft() {
+  return {
+    bristolType: 4,
+    typeChosen: false,
+    color: 'brown',
+    urgency: 0,
+    discomfort: 0,
+    note: '',
+    symptoms: {},
+    photoDataUrl: '',
+  };
+}
+
+export function isDraftDirty(draft = {}) {
+  return Boolean(
+    draft.typeChosen
+    || draft.photoDataUrl
+    || String(draft.note || '').trim()
+    || Number(draft.urgency) > 0
+    || Number(draft.discomfort) > 0
+    || (draft.color && draft.color !== 'brown')
+    || Object.values(draft.symptoms || {}).some(Boolean),
+  );
+}
+
+export function draftNotice(draft = {}) {
+  if (!isDraftDirty(draft)) return '';
+  const parts = [];
+  if (draft.typeChosen) parts.push(`Type ${draft.bristolType}`);
+  if (draft.color && draft.color !== 'brown') parts.push(`${draft.color} color`);
+  if (Number(draft.urgency) > 0) parts.push('urgency');
+  if (Number(draft.discomfort) > 0) parts.push('discomfort');
+  if (String(draft.note || '').trim()) parts.push('note');
+  if (Object.values(draft.symptoms || {}).some(Boolean)) parts.push('symptoms');
+  if (draft.photoDataUrl) parts.push('photo');
+  return parts.join(' · ');
+}

src/followup.js

@@ -0,0 +1,66 @@
+// Hard-stool follow-up (field finding #67).
+//
+// After a hard/lumpy (Bristol 1-2) entry, Timmy asks a short follow-up. Every answer
+// is user-reported: soreness, difficulty passing, hydration, and black/tarry character
+// are never inferred from a photo. The two confirmed red flags map onto the same
+// deterministic symptom keys the rest of the app already escalates on.
+import { detectUrgentFlags } from './domain.js';
+
+export const HARD_STOOL_TYPES = Object.freeze([1, 2]);
+
+// `urgentFlag` is the existing deterministic symptom key a "yes" maps onto. Questions
+// without one stay non-diagnostic self-care only.
+export const HARD_STOOL_QUESTIONS = Object.freeze([
+  Object.freeze({ id: 'difficultToPass', label: 'Was it hard or difficult to pass?', urgentFlag: null }),
+  Object.freeze({ id: 'soreness', label: 'Any soreness or sharp pain afterward?', urgentFlag: null }),
+  Object.freeze({ id: 'bloodVisible', label: 'Any visible red blood?', urgentFlag: 'blood' }),
+  Object.freeze({ id: 'tarryBlack', label: 'Was it truly black, sticky, or tarry — not just dark brown?', urgentFlag: 'blackOrDarkRed' }),
+  Object.freeze({ id: 'dehydration', label: 'Do you feel dehydrated, or is your urine unusually dark?', urgentFlag: null }),
+]);
+
+export const HARD_STOOL_GUIDANCE = Object.freeze([
+  'Drink water steadily through the day rather than a lot at once.',
+  'Do not strain or force it; give it time and try again later if needed.',
+  'Clean gently, pat dry, and avoid scrubbing sore skin.',
+  'A few minutes in a warm sitz bath can ease soreness afterward.',
+  'A barrier ointment on the outside skin can reduce irritation.',
+  'Food-based fiber with fluids helps over days, not minutes.',
+]);
+
+export const HARD_STOOL_GUIDANCE_NOTE = 'General self-care information, not a diagnosis. Your photo cannot rule out bleeding or another cause.';
+export const HARD_STOOL_SEEK_CARE = 'Contact a clinician or urgent service if pain is severe or worsening, you feel faint or weak, you pass very little urine, or any blood appears.';
+
+export function isHardStoolForm(bristolType) {
+  return HARD_STOOL_TYPES.includes(Number(bristolType));
+}
+
+export function needsHardStoolFollowUp(draft = {}) {
+  return isHardStoolForm(draft?.bristolType);
+}
+
+export function createFollowUpAnswers() {
+  return Object.fromEntries(HARD_STOOL_QUESTIONS.map((question) => [question.id, null]));
+}
+
+function confirmedYes(answers, question) {
+  // Only an explicit `true` counts. `null` (unanswered) and `false` (explicit no) do not escalate.
+  return answers?.[question.id] === true;
+}
+
+export function evaluateHardStoolFollowUp(answers = {}) {
+  const answeredIds = HARD_STOOL_QUESTIONS.filter((question) => typeof answers[question.id] === 'boolean');
+  const flags = HARD_STOOL_QUESTIONS.filter((question) => question.urgentFlag && confirmedYes(answers, question))
+    .map((question) => question.urgentFlag);
+  const escalated = detectUrgentFlags(Object.fromEntries(flags.map((flag) => [flag, true])));
+  const urgent = escalated.urgent;
+  return {
+    answered: answeredIds.length > 0,
+    unanswered: HARD_STOOL_QUESTIONS.filter((question) => !answeredIds.includes(question)).map((question) => question.id),
+    urgent,
+    flags,
+    message: urgent ? escalated.message : '',
+    guidance: !urgent && answeredIds.length ? [...HARD_STOOL_GUIDANCE] : [],
+    note: HARD_STOOL_GUIDANCE_NOTE,
+    seekCare: urgent ? '' : HARD_STOOL_SEEK_CARE,
+  };
+}

src/hermes-agent-service.js

@@ -1,8 +1,7 @@
 import { execFile } from 'node:child_process';
 import { randomBytes, timingSafeEqual } from 'node:crypto';
 import { isAbsolute } from 'node:path';
-import { detectUrgentText, hasUrgentLedgerContext, urgentChatMessage } from './domain.js';
-import { OverloadError, createInferenceQueue } from './inference-queue.js';
+import { detectUrgentText, hasUrgentLedgerContext, isReportedSymptom, urgentChatMessage } from './domain.js';
 
 const MAX_MESSAGE_CHARS = 4000;
 const MAX_LEDGER_ENTRIES = 20;
@@ -45,8 +44,6 @@ export function resolveHermesAgentConfig(env = process.env) {
     maxRequestsPerMinute: positiveInt(env.TIMMY_AGENT_RATE_PER_MINUTE, 12, 1, 60),
     maxUnlockAttemptsPerMinute: positiveInt(env.TIMMY_AGENT_UNLOCK_RATE_PER_MINUTE, 5, 1, 30),
     maxSessions: positiveInt(env.TIMMY_AGENT_MAX_SESSIONS, 64, 1, 512),
-    maxConcurrentTurns: positiveInt(env.TIMMY_AGENT_MAX_CONCURRENT_TURNS, 1, 1, 8),
-    maxQueueDepth: positiveInt(env.TIMMY_AGENT_MAX_QUEUE_DEPTH, 4, 0, 64),
     publicStatus(authenticated = false) {
       return {
         enabled,
@@ -89,30 +86,12 @@ export function parseHermesCliOutput(output) {
   return { sessionId: marker[1], reply };
 }
 
-function execFilePromise(command, args, options, signal) {
+function execFilePromise(command, args, options) {
   return new Promise((resolve, reject) => {
-    // Abort must actually terminate the spawned CLI, not merely abandon the
-    // promise — otherwise every cancelled turn leaks an orphan subprocess.
-    let killedByAbort = false;
-    const child = execFile(command, args, options, (error, stdout, stderr) => {
-      if (killedByAbort && signal) {
-        reject(normalizeAbortReason(signal.reason));
-        return;
-      }
+    execFile(command, args, options, (error, stdout, stderr) => {
       if (error) reject(error);
       else resolve({ stdout, stderr });
     });
-    if (!signal) return;
-    const killTree = () => {
-      killedByAbort = true;
-      try { child.kill('SIGTERM'); } catch { /* already exited */ }
-      const forceKill = setTimeout(() => {
-        try { child.kill('SIGKILL'); } catch { /* already exited */ }
-      }, 2_000);
-      forceKill.unref?.();
-    };
-    if (signal.aborted) killTree();
-    else signal.addEventListener('abort', killTree, { once: true });
   });
 }
 
@@ -124,8 +103,7 @@ export function buildHermesEnvironment(source = process.env) {
   return env;
 }
 
-export async function runHermesCliTurn({ prompt, hermesSessionId, config, signal, execImpl = execFilePromise }) {
-  if (signal?.aborted) throw normalizeAbortReason(signal.reason);
+export async function runHermesCliTurn({ prompt, hermesSessionId, config, execImpl = execFilePromise }) {
   const args = ['chat', '-q', prompt, '-Q', '--source', 'tool', '--max-turns', String(config.maxTurns), '--in', config.workdir];
   if (hermesSessionId) args.push('--resume', hermesSessionId, '--no-restore-cwd');
   const output = await execImpl(config.command, args, {
@@ -134,15 +112,10 @@ export async function runHermesCliTurn({ prompt, hermesSessionId, config, signal
     maxBuffer: 1024 * 1024,
     windowsHide: true,
     env: buildHermesEnvironment(),
-  }, signal);
+  });
   return parseHermesCliOutput(`${output.stderr || ''}\n${output.stdout || ''}`);
 }
 
-function normalizeAbortReason(reason) {
-  if (reason instanceof Error) return reason;
-  return new Error(typeof reason === 'string' && reason.trim() ? reason : 'Request cancelled.');
-}
-
 function sanitizeLedger(entries) {
   if (!Array.isArray(entries)) throw new AgentGatewayError(400, 'Ledger context must be an array.');
   return entries.slice(-MAX_LEDGER_ENTRIES).map(entry => ({
@@ -152,7 +125,7 @@ function sanitizeLedger(entries) {
     urgency: Math.min(4, Math.max(0, Number(entry?.urgency) || 0)),
     discomfort: Math.min(4, Math.max(0, Number(entry?.discomfort) || 0)),
     note: String(entry?.note || '').trim().slice(0, 300),
-    symptoms: Object.fromEntries(Object.entries(entry?.symptoms || {}).filter(([, value]) => value === true).map(([key]) => [String(key).slice(0, 40), true])),
+    symptoms: Object.fromEntries(Object.entries(entry?.symptoms || {}).filter(([, value]) => isReportedSymptom(value)).map(([key]) => [String(key).slice(0, 40), true])),
   }));
 }
 
@@ -166,7 +139,6 @@ export function createHermesAgentService({
   runTurn = input => runHermesCliTurn(input),
   randomToken = () => randomBytes(32).toString('base64url'),
   now = () => Date.now(),
-  queue = createInferenceQueue({ concurrency: config.maxConcurrentTurns, maxQueueDepth: config.maxQueueDepth, requestTimeoutMs: config.timeoutMs, now }),
 } = {}) {
   const sessions = new Map();
   let unlockFailures = [];
@@ -210,7 +182,7 @@ export function createHermesAgentService({
       return { cookieToken, public: config.publicStatus(true) };
     },
 
-    async chat({ origin, cookieToken, payload, signal }) {
+    async chat({ origin, cookieToken, payload }) {
       requireOrigin(origin);
       const session = lookup(cookieToken);
       if (!payload || typeof payload !== 'object' || Array.isArray(payload)) throw new AgentGatewayError(400, 'Invalid chat request.');
@@ -223,48 +195,25 @@ export function createHermesAgentService({
       if (urgent) return { reply: urgentChatMessage, connected: true, safetyOverride: true };
       const cutoff = now() - RATE_WINDOW_MS;
       session.requests = session.requests.filter(time => time > cutoff);
-      if (session.requests.length >= config.maxRequestsPerMinute) throw new AgentGatewayError(429, 'Too many messages in a row. Try again shortly.');
+      if (session.requests.length >= config.maxRequestsPerMinute || session.busy) throw new AgentGatewayError(429, 'Timmy is already thinking. Try again shortly.');
       session.requests.push(now());
-      if (signal?.aborted) throw new AgentGatewayError(503, 'The browser closed the request before Timmy could think. Your journal still works.');
-      // Forward browser-side aborts into the inference queue by handle so a
-      // disconnected client releases its slot immediately.
-      let handle = null;
-      const forwardAbort = () => {
-        if (!handle) return;
-        const reason = signal.reason instanceof Error ? signal.reason : normalizeReason(signal.reason);
-        queue.cancel(handle, reason);
-      };
-      if (signal) signal.addEventListener('abort', forwardAbort, { once: true });
+      session.busy = true;
       try {
-        const result = await (handle = queue.run(async runSignal => {
-          if (runSignal.aborted) throw normalizeReason(runSignal.reason);
-          // Session continuity is read at execution time so a request that
-          // waited in the queue resumes the conversation state left by the
-          // turn that ran before it.
-          return runTurn({
-            prompt: buildPrompt(message, ledger, !session.hermesSessionId),
-            hermesSessionId: session.hermesSessionId,
-            config,
-            signal: runSignal,
-          });
-        }));
+        const result = await runTurn({
+          prompt: buildPrompt(message, ledger, !session.hermesSessionId),
+          hermesSessionId: session.hermesSessionId,
+          config,
+        });
         const reply = stripUnsafeControls(result?.reply || '');
         if (!reply || reply.length > 12_000 || !/^[A-Za-z0-9_-]{8,128}$/.test(String(result?.sessionId || ''))) throw new Error('invalid agent result');
-        if (!session.hermesSessionId) session.hermesSessionId = result.sessionId;
+        session.hermesSessionId = result.sessionId;
         return { reply, connected: true };
       } catch (error) {
         if (error instanceof AgentGatewayError) throw error;
-        const messageText = String(error?.message || '');
-        if (error instanceof OverloadError || /timed out|busy right now|disconnected|closed before/i.test(messageText)) {
-          throw new AgentGatewayError(503, messageText);
-        }
         throw new AgentGatewayError(503, 'Hermes is temporarily unavailable. Your local journal still works.');
+      } finally {
+        session.busy = false;
       }
     },
   };
 }
-
-function normalizeReason(reason) {
-  if (reason instanceof Error) return reason;
-  return new Error(typeof reason === 'string' && reason.trim() ? reason : 'Request cancelled.');
-}

src/inference-queue.js

@@ -1,130 +0,0 @@
-export class OverloadError extends Error {
-  constructor(message = 'Timmy is busy right now. Your journal still works — try again shortly or continue manually.') {
-    super(message);
-    this.name = 'OverloadError';
-  }
-}
-
-function normalizeReason(reason) {
-  if (reason instanceof Error) return reason;
-  const text = String(reason ?? '').trim().slice(0, 200);
-  return new Error(text || 'Request cancelled.');
-}
-
-function expiredMessage() {
-  return 'Timmy is busy right now and your request timed out waiting. Your journal still works — try again shortly or continue manually.';
-}
-
-export function createInferenceQueue({
-  concurrency = 1,
-  maxQueueDepth = 0,
-  requestTimeoutMs = 60_000,
-  now = () => Date.now(),
-} = {}) {
-  let active = 0;
-  const waiting = [];
-  const handles = new Map();
-
-  function expireStale(nowMs) {
-    while (waiting.length) {
-      if (nowMs - waiting[0].enqueuedAt <= requestTimeoutMs) break;
-      const expired = waiting.shift();
-      expired.settled = true;
-      expired.abort(new OverloadError(expiredMessage()));
-    }
-  }
-
-  function pump(nowMs = now()) {
-    expireStale(nowMs);
-    while (active < concurrency && waiting.length) {
-      const entry = waiting.shift();
-      if (entry.settled) continue;
-      active += 1;
-      entry.grant();
-    }
-  }
-
-  function release() {
-    active -= 1;
-    pump();
-  }
-
-  async function admit(record) {
-    const { controller } = record;
-    if (controller.signal.aborted) throw normalizeReason(controller.signal.reason);
-    expireStale(now());
-    if (active < concurrency) {
-      active += 1;
-      return;
-    }
-    if (waiting.length >= maxQueueDepth) throw new OverloadError();
-    await new Promise((resolve, reject) => {
-      const entry = {
-        enqueuedAt: now(),
-        settled: false,
-        grant: resolve,
-        abort: reject,
-      };
-      record.entry = entry;
-      waiting.push(entry);
-    });
-    record.entry = null;
-  }
-
-  function run(task) {
-    const controller = new AbortController();
-    const record = { controller, entry: null };
-    let resolveOutcome;
-    let rejectOutcome;
-    // Deliberately not an async function: the caller must receive the very
-    // promise registered in `handles`, or cancellation lookups would target
-    // a different object than the one they hold.
-    const promise = new Promise((resolve, reject) => {
-      resolveOutcome = resolve;
-      rejectOutcome = reject;
-    });
-    handles.set(promise, record);
-    (async () => {
-      let holdsSlot = false;
-      try {
-        await admit(record);
-        holdsSlot = true;
-        // The task body may not have started even though a slot is held; an
-        // external cancel that raced ahead must still stop it here.
-        if (controller.signal.aborted) throw normalizeReason(controller.signal.reason);
-        resolveOutcome(await task(controller.signal));
-      } catch (error) {
-        rejectOutcome(error instanceof Error ? error : normalizeReason(error));
-      } finally {
-        if (holdsSlot) release();
-      }
-      // Drop the handle one microtask after the caller-visible promise
-      // settles, so a same-tick external cancel still finds it.
-      promise.then(
-        () => handles.delete(promise),
-        () => handles.delete(promise),
-      );
-    })();
-    promise.catch(() => {});
-    return promise;
-  }
-
-  function cancel(handle, reason) {
-    const record = handles.get(handle);
-    if (!record) return false;
-    handles.delete(handle);
-    const normalized = normalizeReason(reason);
-    const entry = record.entry;
-    if (entry && !entry.settled) {
-      entry.settled = true;
-      const index = waiting.indexOf(entry);
-      if (index >= 0) waiting.splice(index, 1);
-      entry.abort(normalized);
-    }
-    record.controller.abort(normalized);
-    return true;
-  }
-
-  pump();
-  return { run, cancel };
-}

src/suggestion.js

@@ -0,0 +1,93 @@
+// Tracks where a log entry's visual fields came from, so an AI suggestion is never
+// shown as if the user had confirmed it.
+export const SUGGESTION_STATUS = {
+  none: 'none',
+  pending: 'pending',
+  confirmed: 'confirmed',
+  corrected: 'corrected',
+  manual: 'manual',
+};
+
+const VISUAL_FIELDS = ['bristolType', 'color'];
+
+export function createSuggestionState(suggestion = null) {
+  if (!suggestion || suggestion.status !== 'suggestion') {
+    return { status: SUGGESTION_STATUS.none, suggestion: null, affirmed: false, correctedFields: [] };
+  }
+  return {
+    status: SUGGESTION_STATUS.pending,
+    suggestion: {
+      bristolType: suggestion.bristolType,
+      color: suggestion.color,
+      confidence: Number(suggestion.confidence),
+    },
+    affirmed: false,
+    correctedFields: [],
+  };
+}
+
+export function confirmSuggestion(state = {}) {
+  if (!state.suggestion || state.status !== SUGGESTION_STATUS.pending) return { ...state };
+  return { ...state, status: SUGGESTION_STATUS.confirmed, affirmed: true };
+}
+
+export function changeVisualField(state = {}, field, value) {
+  const correctedFields = [...(state.correctedFields || [])];
+  if (!VISUAL_FIELDS.includes(field)) return { ...state, correctedFields };
+  const suggested = state.suggestion ? state.suggestion[field] : undefined;
+  if (suggested === undefined) {
+    return {
+      ...state,
+      status: state.status === SUGGESTION_STATUS.none ? SUGGESTION_STATUS.manual : state.status,
+      correctedFields,
+    };
+  }
+  if (value === suggested) return { ...state, correctedFields };
+  if (!correctedFields.includes(field)) correctedFields.push(field);
+  return { ...state, status: SUGGESTION_STATUS.corrected, affirmed: false, correctedFields };
+}
+
+function percent(value) {
+  return Math.round(Number(value) * 100);
+}
+
+export function provenanceCopy(state = {}, current = {}) {
+  const suggestion = state.suggestion;
+  const status = suggestion || state.status === SUGGESTION_STATUS.manual
+    ? state.status
+    : SUGGESTION_STATUS.none;
+  if (status === SUGGESTION_STATUS.none) return { status, label: '', detail: '', aria: '' };
+  if (status === SUGGESTION_STATUS.manual) {
+    return {
+      status,
+      label: 'YOUR OWN ENTRY',
+      detail: 'You chose every field yourself. No AI suggestion is applied.',
+      aria: `You chose Type ${current.bristolType}, ${current.color} yourself. No AI suggestion is applied.`,
+    };
+  }
+  const confidence = percent(suggestion.confidence);
+  const suggestedSummary = `Type ${suggestion.bristolType}, ${suggestion.color}`;
+  if (status === SUGGESTION_STATUS.pending) {
+    return {
+      status,
+      label: 'AI SUGGESTION',
+      detail: `Suggested ${suggestedSummary} — provisional and not applied yet. You choose whether to use it.`,
+      aria: `AI suggestion with ${confidence} percent confidence: ${suggestedSummary}. This is a visual suggestion only, not a diagnosis, and it is not saved until you confirm it.`,
+    };
+  }
+  if (status === SUGGESTION_STATUS.corrected) {
+    const chosen = `Type ${current.bristolType}, ${current.color}`;
+    return {
+      status,
+      label: 'CORRECTED BY YOU',
+      detail: `AI suggested ${suggestedSummary}. You changed it to ${chosen} — your values are saved, not the suggestion. Urgency, discomfort, notes, and symptoms must come from you.`,
+      aria: `You changed the AI suggestion. It suggested ${suggestedSummary}; you chose ${chosen}. Your values are saved, not the suggestion.`,
+    };
+  }
+  return {
+    status,
+    label: 'AI PREFILLED',
+    detail: 'AI suggested only form and visible color, and you confirmed it. Urgency, discomfort, notes, and symptoms must come from you.',
+    aria: `You confirmed the AI suggestion with ${confidence} percent confidence: ${suggestedSummary}. You can still change any of it; the suggestion is a visual aid, not a diagnosis.`,
+  };
+}

src/summary.js

@@ -0,0 +1,76 @@
+import { bucketForBristolType } from './domain.js';
+
+export const PATTERN_WINDOW_DAYS = 28;
+// Two logs are an anecdote. Below this the summary is required to say so instead of describing a trend.
+export const MIN_WINDOW_LOGS = 3;
+
+const DAY_MS = 86400000;
+
+// The summary may only describe what the user recorded. No cause, no health verdict, no food ruling.
+const BOUNDARY = 'Built only from your own confirmed records in this window. Timmy reports what you logged and when — not why, and never a verdict on your health or your food.';
+
+function inWindowRecords(entries, now, windowDays) {
+  const startedAt = now - windowDays * DAY_MS;
+  return (Array.isArray(entries) ? entries : [])
+    .map(entry => ({ entry, at: new Date(entry?.occurredAt).getTime() }))
+    .filter(({ at }) => Number.isFinite(at) && at <= now && at >= startedAt)
+    .sort((left, right) => left.at - right.at)
+    .map(({ entry, at }) => ({
+      id: String(entry?.id ?? ''),
+      occurredAt: new Date(at).toISOString(),
+      bristolType: Number(entry?.bristolType),
+      bucket: bucketForBristolType(entry?.bristolType),
+    }));
+}
+
+export function buildPatternSummary(entries = [], { now = Date.now(), windowDays = PATTERN_WINDOW_DAYS } = {}) {
+  const records = inWindowRecords(entries, now, windowDays);
+  const window = {
+    days: windowDays,
+    label: `last ${windowDays} days`,
+    start: new Date(now - windowDays * DAY_MS).toISOString(),
+    end: new Date(now).toISOString(),
+  };
+
+  if (records.length < MIN_WINDOW_LOGS) {
+    return {
+      window,
+      records,
+      insufficient: true,
+      statements: [],
+      boundary: BOUNDARY,
+      copy: `Not enough confirmed logs in this window yet — ${records.length} of ${MIN_WINDOW_LOGS} needed before Timmy describes a pattern.`,
+    };
+  }
+
+  const frequency = {
+    id: 'frequency',
+    text: `${records.length} confirmed log${records.length === 1 ? '' : 's'} in the ${window.label}.`,
+    entryIds: records.map(record => record.id),
+  };
+
+  const buckets = new Map();
+  for (const record of records) {
+    if (!buckets.has(record.bucket)) buckets.set(record.bucket, []);
+    buckets.get(record.bucket).push(record.id);
+  }
+  const bucketLine = (bucket, label) => ({
+    id: bucket === 'constipation' ? 'firm' : bucket,
+    text: `${label}: ${buckets.get(bucket).length} of ${records.length} confirmed log${records.length === 1 ? '' : 's'}.`,
+    entryIds: buckets.get(bucket),
+  });
+  const formLines = [
+    ['constipation', 'Firm side (Type 1–2)'],
+    ['typical', 'Typical range (Type 3–4)'],
+    ['loose', 'Loose side (Type 5–7)'],
+  ].filter(([bucket]) => buckets.has(bucket)).map(([bucket, label]) => bucketLine(bucket, label));
+  // Both ends in one window is not a trend, and the summary has to say so out loud rather than
+  // picking whichever side is marginally larger.
+  const mixedLine = buckets.has('constipation') && buckets.has('loose') ? [{
+    id: 'mixed',
+    text: `Firm and loose logs both appear in the ${window.label} (${buckets.get('constipation').length} firm, ${buckets.get('loose').length} loose), which is a mixed pattern and not one trend.`,
+    entryIds: records.filter(record => record.bucket === 'constipation' || record.bucket === 'loose').map(record => record.id),
+  }] : [];
+
+  return { window, records, insufficient: false, statements: [frequency, ...formLines, ...mixedLine], copy: '', boundary: BOUNDARY };
+}

src/vision-corpus.js

@@ -0,0 +1,111 @@
+// Contract for the deterministic vision corpus under tests/fixtures/vision-corpus.
+//
+// The corpus exists to prove one claim continuously: every provider response Timmy
+// receives is either a schema-valid visible-field suggestion or it fails closed.
+// Fixtures are synthetic images generated by scripts/build_vision_corpus.py; no real
+// medical imagery, personal data, or third-party content is redistributable here.
+import { readFile } from 'node:fs/promises';
+import { createHash } from 'node:crypto';
+import { join } from 'node:path';
+import { parseVisionResponse, VISION_FAILURE_CODES } from './analysis.js';
+
+export const VISION_CORPUS_LICENSE = 'CC0-1.0';
+
+// Case classes the corpus must always cover, from issue #18.
+export const VISION_CORPUS_CLASSES = Object.freeze([
+  'stool',
+  'non-stool',
+  'blur',
+  'glare',
+  'empty-bowl',
+  'malformed-response',
+]);
+
+export const VISION_CORPUS_OUTCOMES = Object.freeze(['suggestion', 'abstained', 'fail_closed']);
+
+const ALLOWED_CLASSES = new Set(VISION_CORPUS_CLASSES);
+
+export function validateCorpusManifest(manifest) {
+  if (!manifest || typeof manifest !== 'object') throw new Error('vision corpus manifest must be an object');
+  if (manifest.schemaVersion !== 1) throw new Error('vision corpus manifest must declare schemaVersion 1');
+  if (manifest.license !== VISION_CORPUS_LICENSE) {
+    throw new Error(`vision corpus must be redistributable under ${VISION_CORPUS_LICENSE}`);
+  }
+  if (!Array.isArray(manifest.cases) || manifest.cases.length === 0) throw new Error('vision corpus must list cases');
+  const ids = new Set();
+  for (const entry of manifest.cases) {
+    if (!entry?.id) throw new Error('every corpus case needs an id');
+    if (ids.has(entry.id)) throw new Error(`duplicate corpus case: ${entry.id}`);
+    ids.add(entry.id);
+    if (!ALLOWED_CLASSES.has(entry.caseClass)) throw new Error(`${entry.id} has an unsupported caseClass: ${entry.caseClass}`);
+    if (entry.synthetic !== true) throw new Error(`${entry.id} must be a synthetic fixture`);
+    if (entry.license !== VISION_CORPUS_LICENSE) throw new Error(`${entry.id} must record its ${VISION_CORPUS_LICENSE} license`);
+    if (typeof entry.provenance !== 'string' || !entry.provenance.trim()) throw new Error(`${entry.id} must record provenance`);
+    if (!/^[a-f0-9]{64}$/.test(String(entry.sha256 || ''))) throw new Error(`${entry.id} must record a sha256`);
+    if (!VISION_CORPUS_OUTCOMES.includes(entry.expectedOutcome)) {
+      throw new Error(`${entry.id} must declare an expectedOutcome from ${VISION_CORPUS_OUTCOMES.join(', ')}`);
+    }
+    if (!('providerContent' in entry)) throw new Error(`${entry.id} must record the provider response it replays`);
+  }
+  for (const required of VISION_CORPUS_CLASSES) {
+    if (!manifest.cases.some(entry => entry.caseClass === required)) {
+      throw new Error(`vision corpus is missing the required ${required} case`);
+    }
+  }
+  return manifest;
+}
+
+export function classifyVisionOutcome(providerContent) {
+  let parsed;
+  try {
+    parsed = parseVisionResponse(providerContent);
+  } catch (error) {
+    const reason = error?.code === VISION_FAILURE_CODES.invalidJson
+      ? 'unparsable_content'
+      : error?.code === VISION_FAILURE_CODES.invalidFields
+        ? 'out_of_range_or_missing_fields'
+        : 'unexpected_error';
+    return { outcome: 'fail_closed', reason, detail: error.message };
+  }
+  if (parsed.status === 'suggestion') {
+    return {
+      outcome: 'suggestion',
+      reason: 'schema_valid_suggestion',
+      bristolType: parsed.bristolType,
+      color: parsed.color,
+      confidence: parsed.confidence,
+    };
+  }
+  if (parsed.status === 'needs_user_input') {
+    return {
+      outcome: 'abstained',
+      reason: parsed.abstainedFor,
+      detail: parsed.reason,
+    };
+  }
+  return { outcome: 'fail_closed', reason: 'unparsable_content', detail: 'The response could not be used.' };
+}
+
+export async function loadVisionCorpus(directory) {
+  const manifestPath = join(directory, 'manifest.json');
+  let manifest;
+  try {
+    manifest = JSON.parse(await readFile(manifestPath, 'utf8'));
+  } catch (error) {
+    throw new Error(`vision corpus manifest could not be read at ${manifestPath}: ${error.message}`);
+  }
+  validateCorpusManifest(manifest);
+  for (const entry of manifest.cases) {
+    let bytes;
+    try {
+      bytes = await readFile(join(directory, entry.file));
+    } catch {
+      throw new Error(`${entry.id} is missing its fixture ${entry.file}`);
+    }
+    const digest = createHash('sha256').update(bytes).digest('hex');
+    if (digest !== entry.sha256 || bytes.length !== entry.bytes) {
+      throw new Error(`${entry.id} fixture ${entry.file} does not match its recorded sha256; regenerate the corpus instead of editing it`);
+    }
+  }
+  return { ...manifest, directory };
+}

src/vision-readiness.js

@@ -0,0 +1,47 @@
+// Decides whether the photo-first flow can promise AI analysis.
+// When it cannot, logging must still reach manual Bristol entry in one action.
+const MANUAL_LABEL = 'Continue without AI';
+const DISABLED_LABEL = 'Log it manually';
+
+export function visionReadiness(status) {
+  if (!status) {
+    return {
+      phase: 'checking',
+      ready: false,
+      manualOnly: true,
+      manualLabel: MANUAL_LABEL,
+      message: 'Checking the vision worker. Manual logging is already available.',
+    };
+  }
+  if (status.enabled === false) {
+    return {
+      phase: 'disabled',
+      ready: false,
+      manualOnly: true,
+      manualLabel: DISABLED_LABEL,
+      message: 'AI photo analysis is off in this build. Manual logging is fully available.',
+    };
+  }
+  if (status.providerReady !== true) {
+    return {
+      phase: 'offline',
+      ready: false,
+      manualOnly: true,
+      manualLabel: MANUAL_LABEL,
+      message: 'Vision worker offline. Manual logging is still available.',
+    };
+  }
+  // A worker that answers /v1/models has not necessarily loaded the model yet (#15), so readiness
+  // passes only once the pinned model is confirmed loaded. An unconfirmed model fails closed to the
+  // manual path instead of offering an AI control that fails after the upload.
+  if (status.modelSeen !== true) {
+    return {
+      phase: 'loading',
+      ready: false,
+      manualOnly: true,
+      manualLabel: MANUAL_LABEL,
+      message: 'The vision worker is up but the model is not loaded yet. Manual logging is available.',
+    };
+  }
+  return { phase: 'ready', ready: true, manualOnly: false, manualLabel: '', message: '' };
+}

src/vision-service.js

@@ -1,4 +1,17 @@
-import { buildVisionRequest, parseVisionResponse, validatePhotoPayload } from './analysis.js';
+import { buildVisionRequest, parseVisionResponse, validatePhotoPayload, VISION_FAILURE_CODES } from './analysis.js';
+
+// One place decides what a failed analysis request returns, so the browser copy is testable and a
+// provider's own words never reach the user.
+const FAIL_CLOSED_COPY = 'No suggestion was applied. Continue manually, or try a clearer photo.';
+const INPUT_REJECTION = /consent|JPEG|PNG|WebP|empty|too large/i;
+
+export function visionFailureResponse(error) {
+  const message = String(error?.message || '');
+  if (INPUT_REJECTION.test(message)) return { status: 400, body: { error: message } };
+  const schemaFailure = error?.code === VISION_FAILURE_CODES.invalidJson || error?.code === VISION_FAILURE_CODES.invalidFields;
+  if (schemaFailure) return { status: 503, body: { error: FAIL_CLOSED_COPY } };
+  return { status: 503, body: { error: message || 'AI analysis is temporarily unavailable. Continue manually.' } };
+}
 
 function providerEndpoint(baseUrl) {
   let url;
@@ -7,22 +20,18 @@ function providerEndpoint(baseUrl) {
   return `${url.toString().replace(/\/$/, '')}/chat/completions`;
 }
 
-export async function analyzePhoto({ payload, fetchImpl = fetch, config, signal }) {
+export async function analyzePhoto({ payload, fetchImpl = fetch, config }) {
   const photo = validatePhotoPayload(payload);
   if (!config?.model) throw new Error('AI analysis is not configured.');
   const endpoint = providerEndpoint(config.baseUrl);
-  // The provider call honours both its own deadline and a per-request
-  // cancellation so abandoned clients stop consuming inference capacity.
-  const timeoutSignal = AbortSignal.timeout(config.requestTimeoutMs || 60_000);
-  const combinedSignal = signal ? AbortSignal.any([timeoutSignal, signal]) : timeoutSignal;
   const response = await fetchImpl(endpoint, {
     method: 'POST',
     headers: {
       'content-type': 'application/json',
-      authorization: 'Bearer ' + String(config.apiKey || 'local-proxy'),
+      authorization: `Bearer ${config.apiKey || 'local-proxy'}`,
     },
     body: JSON.stringify(buildVisionRequest({ imageDataUrl: photo.imageDataUrl, model: config.model })),
-    signal: combinedSignal,
+    signal: AbortSignal.timeout(config.requestTimeoutMs || 60_000),
   }).catch(() => { throw new Error('AI analysis is temporarily unavailable. Continue manually.'); });
   if (!response.ok) throw new Error('AI analysis is temporarily unavailable. Continue manually.');
   let data;

styles.css

@@ -17,8 +17,38 @@ main{display:block}.eyebrow{font-size:11px;font-weight:800;letter-spacing:.1em;t
 .btn{min-height:50px;border:0;border-radius:16px;padding:0 17px;font-weight:800;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn:active{transform:scale(.98)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--ink);color:#fff}.btn-secondary{background:var(--teal-soft);color:var(--teal)}.btn-ghost{background:transparent;border:1px solid var(--line)}.btn-danger{background:var(--red);color:#fff}.btn-wide{width:100%}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.fine{font-size:12px;color:var(--muted);line-height:1.45}.empty{text-align:center;padding:22px 10px;color:var(--muted)}.empty img{width:68px}.empty h3{color:var(--ink);margin-top:8px}.empty p{margin-bottom:0}
 .chat-page{display:flex;flex-direction:column;min-height:calc(100vh - 175px)}.chat-title{padding-bottom:8px}.agent-status{display:flex;align-items:center;gap:11px;padding:11px 13px;background:rgba(255,253,250,.7);border:1px solid var(--line);border-radius:17px;margin-bottom:12px}.agent-status>i{width:10px;height:10px;border-radius:50%;background:#a9a39d;box-shadow:0 0 0 5px rgba(169,163,157,.13)}.agent-status.connected>i{background:#209479;box-shadow:0 0 0 5px rgba(32,148,121,.13)}.agent-status.locked>i{background:#d19b27}.agent-status strong,.agent-status small{display:block}.agent-status strong{font-size:13px}.agent-status small{font-size:11px;color:var(--muted);margin-top:2px}.conversation{background:var(--surface);border:1px solid var(--line);border-radius:23px;padding:13px;box-shadow:0 10px 30px rgba(55,40,31,.05)}.chat{display:flex;flex-direction:column;gap:9px;min-height:195px;max-height:42vh;overflow:auto;padding:4px 1px 14px}.bubble{max-width:86%;padding:11px 13px;border-radius:17px;line-height:1.42;font-size:14px;white-space:pre-wrap}.bubble.timmy{align-self:flex-start;background:#efebe4;border-bottom-left-radius:5px}.bubble.user{align-self:flex-end;background:var(--teal);color:white;border-bottom-right-radius:5px}.thinking{display:flex;gap:4px}.thinking span{width:6px;height:6px;border-radius:50%;background:#8b847d;animation:blink 1s infinite}.thinking span:nth-child(2){animation-delay:.15s}.thinking span:nth-child(3){animation-delay:.3s}@keyframes blink{50%{opacity:.25;transform:translateY(-2px)}}.composer{display:grid;grid-template-columns:1fr 45px;gap:8px;align-items:end;background:#f0ece5;border-radius:18px;padding:6px}.composer textarea{border:0;background:transparent;resize:none;min-height:42px;max-height:110px;padding:10px 9px;outline:0;color:var(--ink)}.composer button{width:44px;height:44px;border:0;border-radius:14px;background:var(--ink);color:white;font-size:22px;cursor:pointer}.composer button:disabled{opacity:.4}.composer-note{font-size:10px;color:var(--muted);margin:7px 5px 0;line-height:1.35}.chat-error{font-size:12px;color:var(--red);margin:0 4px 8px}.safety-line{margin:13px 4px 0;color:var(--muted);font-size:11px;line-height:1.45}.safety-line strong{color:var(--ink)}.unlock-card{background:#fff8e6;border:1px solid #ead9a9;border-radius:20px;padding:14px;margin-bottom:12px}.unlock-card>label{display:block;font-size:12px;font-weight:800;margin-bottom:7px}.unlock-row{display:grid;grid-template-columns:1fr auto;gap:8px}.unlock-card .fine{margin:8px 2px 0}
 .sheet-backdrop{position:fixed;inset:0;background:rgba(28,22,18,.42);display:flex;align-items:flex-end;justify-content:center;z-index:50;padding-top:28px;backdrop-filter:blur(5px)}.sheet{width:min(100%,680px);max-height:94vh;overflow:auto;background:var(--surface);border-radius:28px 28px 0 0;padding:9px 18px calc(24px + env(safe-area-inset-bottom));box-shadow:0 -15px 50px rgba(30,22,18,.2)}.sheet-handle{width:38px;height:4px;background:#d8d1c8;border-radius:999px;margin:2px auto 15px}.sheet-header{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.sheet-header h2{margin-top:4px}.icon-btn{width:44px;height:44px;border:0;border-radius:50%;background:#efebe5;font-size:24px;cursor:pointer}.progress{height:4px;background:#eee8df;border-radius:99px;margin:7px 0 18px;overflow:hidden}.progress i{height:100%;display:block;background:var(--teal)}.progress-step-1{width:33.34%}.progress-step-2{width:66.68%}.progress-step-3{width:100%}
-.scan-hero{text-align:center;padding:3px 15px 12px}.scan-hero img{width:76px}.scan-hero h3{font-size:19px;margin:4px 0 7px}.scan-hero p{font-size:13px;line-height:1.45;color:var(--muted)}.model-status{border-radius:14px;padding:9px 11px;font-size:11px;font-weight:700;margin-bottom:12px}.model-status.ready{background:var(--teal-soft);color:var(--teal)}.model-status.offline{background:var(--red-soft);color:var(--red)}.model-status.checking{background:#f0ece5;color:var(--muted)}.photo-capture{display:grid;place-items:center;text-align:center;border:1.5px dashed #b9aea1;border-radius:21px;padding:22px;background:#faf7f1;cursor:pointer}.photo-capture b{font-size:30px}.photo-capture strong{margin:6px 0 2px}.photo-capture span{font-size:11px;color:var(--muted)}.photo-capture input{display:none}.photo-preview{display:block;width:100%;max-height:250px;object-fit:cover;border-radius:18px;margin:10px 0}.quality-note{font-size:12px;color:var(--muted)}.consent-card{background:#f5f1e9;border-radius:18px;padding:12px;margin:12px 0}.check{display:flex;gap:11px;align-items:flex-start;padding:9px 0}.check input{width:20px;height:20px;accent-color:var(--teal);flex:0 0 auto}.check span{font-size:13px;line-height:1.4}.analyzing{text-align:center;padding:33px 10px}.analyzing img{width:86px}.spinner{width:32px;height:32px;border:3px solid var(--soft);border-top-color:var(--teal);border-radius:50%;animation:spin .8s linear infinite;margin:10px auto}@keyframes spin{to{transform:rotate(360deg)}}.analyzing p{font-size:13px;color:var(--muted)}.scan-result{background:var(--teal-soft);border-radius:20px;padding:17px;margin-bottom:13px}.scan-result.needs-input{background:#f2eee7;text-align:center}.scan-result.needs-input>b{font-size:28px}.scan-result p{font-size:13px;line-height:1.45;margin:9px 0 0}.ai-badge{font-size:10px;font-weight:850;letter-spacing:.08em;color:var(--teal)}.suggestion-pair{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:12px}.suggestion-pair>div{background:var(--surface);padding:12px;border-radius:14px}.suggestion-pair small,.suggestion-pair strong{display:block}.suggestion-pair small{font-size:9px;color:var(--muted)}.suggestion-pair strong{font-size:18px;margin-top:2px}.ai-prefill{background:var(--teal-soft);border-radius:16px;padding:11px 13px;margin-bottom:12px}.ai-prefill strong,.ai-prefill small{display:block}.ai-prefill small{color:var(--muted);margin-top:3px}.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.bristol{min-height:66px;border:1px solid var(--line);background:#f7f3ed;border-radius:16px;padding:10px;text-align:left;cursor:pointer}.bristol strong,.bristol span{display:block}.bristol span{font-size:11px;color:var(--muted);margin-top:2px}.bristol.selected{background:var(--ink);color:white}.bristol.selected span{color:#ddd}.field{display:block;margin-bottom:15px}.field-label{display:block;font-size:12px;font-weight:800;margin-bottom:6px}.input{width:100%;min-height:48px;border:1px solid var(--line);border-radius:14px;background:#f8f5ef;padding:10px 12px;color:var(--ink)}textarea.input{min-height:85px;resize:vertical}.range-row{display:grid;grid-template-columns:1fr 37px;gap:10px;align-items:center}.range-row input{accent-color:var(--teal)}.range-val{width:37px;height:37px;border-radius:12px;background:var(--soft);display:grid;place-items:center;font-weight:800}.photo-drop{width:100%;background:#f3eee7}.symptoms{display:flex;flex-direction:column}.alert{background:var(--red-soft);border:1px solid #eec1ba;border-radius:16px;padding:13px;color:#75261f}.alert p{margin:5px 0 0;font-size:13px;line-height:1.4}
+.draft-resume{display:flex;align-items:center;justify-content:space-between;gap:10px;background:#fdf3d8;border:1px solid #ecd9a3;border-radius:14px;padding:8px 11px;margin:0 0 14px;font-size:12px;line-height:1.35;color:#5d4a12}.draft-resume strong{font-weight:800}
+.scan-hero{text-align:center;padding:3px 15px 12px}.scan-hero img{width:76px}.scan-hero h3{font-size:19px;margin:4px 0 7px}.scan-hero p{font-size:13px;line-height:1.45;color:var(--muted)}.model-status{border-radius:14px;padding:9px 11px;font-size:11px;font-weight:700;margin-bottom:12px}.model-status.ready{background:var(--teal-soft);color:var(--teal)}.model-status.offline{background:var(--red-soft);color:var(--red)}.model-status.loading{background:#fdf3d8;color:#5d4a12}.capture-choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.capture-status{background:var(--red-soft);color:var(--red);border-radius:14px;padding:10px 12px;font-size:12px;line-height:1.4}.photo-capture{display:grid;place-items:center;text-align:center;border:1.5px dashed #b9aea1;border-radius:21px;padding:16px 10px;background:#faf7f1;cursor:pointer}.photo-capture b{font-size:30px}.photo-capture strong{margin:6px 0 2px}.photo-capture span{font-size:11px;color:var(--muted)}.photo-capture input{display:none}.photo-preview{display:block;width:100%;max-height:250px;object-fit:cover;border-radius:18px;margin:10px 0}.quality-note{font-size:12px;color:var(--muted)}.consent-card{background:#f5f1e9;border-radius:18px;padding:12px;margin:12px 0}.check{display:flex;gap:11px;align-items:flex-start;padding:9px 0}.check input{width:20px;height:20px;accent-color:var(--teal);flex:0 0 auto}.check span{font-size:13px;line-height:1.4}.analyzing{text-align:center;padding:33px 10px}.analyzing img{width:86px}.spinner{width:32px;height:32px;border:3px solid var(--soft);border-top-color:var(--teal);border-radius:50%;animation:spin .8s linear infinite;margin:10px auto}@keyframes spin{to{transform:rotate(360deg)}}.analyzing p{font-size:13px;color:var(--muted)}.scan-result{background:var(--teal-soft);border-radius:20px;padding:17px;margin-bottom:13px}.scan-result.needs-input{background:#f2eee7;text-align:center}.scan-result.needs-input>b{font-size:28px}.scan-result p{font-size:13px;line-height:1.45;margin:9px 0 0}.ai-badge{font-size:10px;font-weight:850;letter-spacing:.08em;color:var(--teal)}.suggestion-pair{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:12px}.suggestion-pair>div{background:var(--surface);padding:12px;border-radius:14px}.suggestion-pair small,.suggestion-pair strong{display:block}.suggestion-pair small{font-size:9px;color:var(--muted)}.suggestion-pair strong{font-size:18px;margin-top:2px}.ai-prefill{background:var(--teal-soft);border-radius:16px;padding:11px 13px;margin-bottom:12px}.ai-prefill strong,.ai-prefill small{display:block}.ai-prefill small{color:var(--muted);margin-top:3px}.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.bristol{min-height:66px;border:1px solid var(--line);background:#f7f3ed;border-radius:16px;padding:10px;text-align:left;cursor:pointer}.bristol strong,.bristol span{display:block}.bristol span{font-size:11px;color:var(--muted);margin-top:2px}.bristol.selected{background:var(--ink);color:white}.bristol.selected span{color:#ddd}.field{display:block;margin-bottom:15px}.field-label{display:block;font-size:12px;font-weight:800;margin-bottom:6px}.input{width:100%;min-height:48px;border:1px solid var(--line);border-radius:14px;background:#f8f5ef;padding:10px 12px;color:var(--ink)}textarea.input{min-height:85px;resize:vertical}.range-row{display:grid;grid-template-columns:1fr 37px;gap:10px;align-items:center}.range-row input{accent-color:var(--teal)}.range-val{width:37px;height:37px;border-radius:12px;background:var(--soft);display:grid;place-items:center;font-weight:800}.photo-drop{width:100%;background:#f3eee7}.symptoms{display:flex;flex-direction:column}.alert{background:var(--red-soft);border:1px solid #eec1ba;border-radius:16px;padding:13px;color:#75261f}.alert p{margin:5px 0 0;font-size:13px;line-height:1.4}
 .privacy-list{display:flex;flex-direction:column;gap:4px}.privacy-item{display:grid;grid-template-columns:40px 1fr;gap:11px;padding:11px 0;border-bottom:1px solid var(--line)}.privacy-item:last-child{border-bottom:0}.privacy-item>b{width:38px;height:38px;border-radius:13px;background:var(--teal-soft);display:grid;place-items:center;color:var(--teal)}.privacy-item h3{margin-bottom:4px}.privacy-item p,.source-list p{font-size:13px;line-height:1.45;color:var(--muted);margin-bottom:5px}.source-list a{color:var(--teal)}.danger-zone{border-color:#e9c4bf}.toast{position:fixed;left:50%;bottom:96px;transform:translateX(-50%);background:var(--ink);color:white;border-radius:999px;padding:11px 16px;font-size:13px;font-weight:700;z-index:100;box-shadow:var(--shadow)}
 .staging-label{margin:8px auto 86px;text-align:center;color:var(--muted);font-size:10px;letter-spacing:.03em;opacity:.72}
 @media(min-width:560px){.app-shell{padding-inline:24px}.sleek-hero{padding-inline:10px}.choice-grid{grid-template-columns:repeat(3,1fr)}}
 @media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}
+/* #13 AI suggestion provenance: provisional, confirmed, and corrected states never look alike */
+.scan-result.provisional{border:1.5px dashed var(--teal)}
+.ai-provenance[data-provenance="confirmed"]{border:1px solid #b7ded6;background:var(--teal-soft)}
+.ai-provenance[data-provenance="corrected"]{border:1px solid #e6cd9c;background:#fdf4e4}
+.ai-provenance[data-provenance="corrected"] .ai-badge{color:#8a6412}
+.provenance-note{font-size:12px;line-height:1.45;color:var(--muted);margin:8px 0 0;padding-left:9px;border-left:3px solid #cfc5b6}
+.ai-provenance[data-provenance="corrected"] .provenance-note{border-left-color:#e0b96a}
+.followup{background:#fdf7ea;border:1px solid #eeddb5;border-radius:18px;padding:13px;margin:15px 0 0}
+.followup h3{font-size:15px;margin:0 0 4px}
+.followup>.fine{margin-bottom:6px}
+.followup-row{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center;padding:9px 0;border-top:1px solid var(--line)}
+.followup-row>span{font-size:13px;line-height:1.35}
+.followup-map{display:block;font-size:10px;font-weight:600;color:var(--muted);margin-top:3px}
+.followup-toggle{display:flex;gap:6px}
+.followup-toggle button{min-height:40px;min-width:54px;border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--muted);font-weight:800;font-size:12px;cursor:pointer}
+.followup-toggle button.selected{background:var(--ink);color:#fff;border-color:var(--ink)}
+.followup-guidance{margin-top:12px;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:12px}
+.followup-guidance>strong{display:block;font-size:13px}
+.followup-guidance ul{margin:8px 0 0;padding-left:18px}
+.followup-guidance li{font-size:12.5px;line-height:1.45;color:#4d453e;margin-bottom:4px}
+.followup-guidance .fine{margin:8px 0 0}
+.followup-guidance.escalated{background:var(--red-soft);border-color:#eec1ba}
+.followup-guidance.escalated>strong{color:#75261f}
+.pattern-card{align-items:start}
+.pattern-window{margin:3px 0 6px;font-size:12px;font-weight:800;color:var(--teal);letter-spacing:.02em}
+.pattern-statements{margin:0;padding:0;list-style:none}
+.pattern-statements li{font-size:13.5px;line-height:1.45;margin-bottom:7px;color:#4d453e}
+.pattern-link{display:inline-block;margin-top:3px;min-height:32px;padding:5px 10px;border:1px solid #bcdfd4;border-radius:999px;background:var(--surface);color:var(--teal);font-weight:800;font-size:11px;cursor:pointer}
+.pattern-boundary{margin:8px 0 0;color:var(--muted)}

tests/agent-queue.test.js

@@ -1,92 +0,0 @@
-import test from 'node:test';
-import assert from 'node:assert/strict';
-
-import { AgentGatewayError, createHermesAgentService, resolveHermesAgentConfig } from '../src/hermes-agent-service.js';
-
-const origin = 'http://127.0.0.1:4173';
-const accessCode = 'test-agent-access-code-2026';
-const configured = () => resolveHermesAgentConfig({
-  TIMMY_AGENT_ENABLED: 'true',
-  TIMMY_AGENT_ACCESS_TOKEN: accessCode,
-  TIMMY_PUBLIC_ORIGIN: origin,
-  TIMMY_AGENT_WORKDIR: '/tmp/timmy-agent-workspace',
-});
-
-function deferred() {
-  let resolve;
-  let reject;
-  const promise = new Promise((res, rej) => { resolve = res; reject = rej; });
-  return { promise, resolve, reject };
-}
-
-async function unlock(service, token) {
-  await service.unlock({ origin, accessCode });
-  return token;
-}
-
-test('chat requests beyond the queue depth get a stable sanitized overload fallback', async () => {
-  let clock = 0;
-  const gate = deferred();
-  let started = 0;
-  const service = createHermesAgentService({
-    config: { ...configured(), maxQueueDepth: 1 },
-    randomToken: () => 'queue-cookie',
-    now: () => clock,
-    runTurn: async () => {
-      started += 1;
-      return gate.promise;
-    },
-  });
-  await unlock(service);
-
-  const first = service.chat({ origin, cookieToken: 'queue-cookie', payload: { message: 'first', ledger: [] } });
-  await new Promise(resolve => setImmediate(resolve));
-  assert.equal(started, 1);
-
-  const second = service.chat({ origin, cookieToken: 'queue-cookie', payload: { message: 'second', ledger: [] } });
-  await new Promise(resolve => setImmediate(resolve));
-  assert.equal(started, 1, 'second request waits in the bounded queue');
-
-  await assert.rejects(() => service.chat({ origin, cookieToken: 'queue-cookie', payload: { message: 'third', ledger: [] } }), error => {
-    assert.equal(error.status, 503);
-    assert.match(error.message, /busy|try again/i);
-    assert.doesNotMatch(error.message, /spawn|hermes|session|token|workdir/i);
-    return true;
-  }, 'request beyond max queue depth fails fast with sanitized copy');
-
-  gate.resolve({ reply: 'eventually', sessionId: 'private-session' });
-  assert.match((await first).reply, /eventually/);
-  assert.match((await second).reply, /eventually/);
-});
-
-test('a chat request abandoned by its browser is cancelled without running Hermes and frees its slot', async () => {
-  let clock = 0;
-  const gate = deferred();
-  const started = [];
-  const service = createHermesAgentService({
-    config: { ...configured(), maxQueueDepth: 2 },
-    randomToken: () => 'disconnect-cookie',
-    now: () => clock,
-    runTurn: async ({ signal }) => {
-      started.push('run');
-      return new Promise((resolve, reject) => {
-        signal.addEventListener('abort', () => reject(new Error('aborted')));
-        gate.promise.then(resolve, reject);
-      });
-    },
-  });
-  await unlock(service, 'disconnect-cookie');
-
-  const active = service.chat({ origin, cookieToken: 'disconnect-cookie', payload: { message: 'holding slot', ledger: [] } });
-  await new Promise(resolve => setImmediate(resolve));
-  const abandonSignal = new AbortController();
-  const abandoned = service.chat({ origin, cookieToken: 'disconnect-cookie', payload: { message: 'queued', ledger: [] }, signal: abandonSignal.signal });
-  await new Promise(resolve => setImmediate(resolve));
-
-  abandonSignal.abort(new Error('client disconnected'));
-  await assert.rejects(() => abandoned, error => error.status === 503 && /closed|disconnect/i.test(error.message));
-
-  gate.resolve({ reply: 'late answer', sessionId: 'private-session' });
-  assert.match((await active).reply, /late answer/);
-  assert.deepEqual(started, ['run'], 'the cancelled request never invoked a Hermes turn');
-});

tests/agent-turn-timeout.test.js

@@ -1,109 +0,0 @@
-import test from 'node:test';
-import assert from 'node:assert/strict';
-
-import { chmod, mkdir, rm, writeFile } from 'node:fs/promises';
-import { tmpdir } from 'node:os';
-import { join } from 'node:path';
-import { constants as fsConstants } from 'node:fs';
-
-import { AgentGatewayError, createHermesAgentService, resolveHermesAgentConfig, runHermesCliTurn } from '../src/hermes-agent-service.js';
-
-const origin = 'http://127.0.0.1:4173';
-const accessCode = 'test-agent-access-code-2026';
-const configured = () => resolveHermesAgentConfig({
-  TIMMY_AGENT_ENABLED: 'true',
-  TIMMY_AGENT_ACCESS_TOKEN: accessCode,
-  TIMMY_PUBLIC_ORIGIN: origin,
-  TIMMY_AGENT_WORKDIR: '/tmp/timmy-agent-workspace',
-});
-
-async function waitUntil(check, timeoutMs = 3_000, stepMs = 20) {
-  const deadline = Date.now() + timeoutMs;
-  while (Date.now() < deadline) {
-    if (await check()) return true;
-    await new Promise(resolve => setTimeout(resolve, stepMs));
-  }
-  return false;
-}
-
-function isAlive(pid) {
-  try { process.kill(pid, 0); return true; } catch (error) { return error.code === 'EPERM'; }
-}
-
-test('aborting an in-flight Hermes turn kills the child promptly and leaves no orphan process', async () => {
-  const dir = await mkdir(join(tmpdir(), `timmy-orphan-${Date.now()}-`), { recursive: true });
-  const pidFile = join(dir, 'child.pid');
-  const fixture = join(dir, 'slow-hermes.sh');
-  // Prints valid Hermes output immediately, then idles long enough that only
-  // an explicit kill can end it. `exec` makes the recorded PID the sleeper.
-  await writeFile(fixture, `#!/usr/bin/env bash\nprintf '%s\\n' $$ > '${pidFile}'\necho "session_id: fixture_kill_001"\necho "thinking"\nexec sleep 60\n`, { mode: fsConstants.S_IRWXU });
-
-  const controller = new AbortController();
-  const turn = runHermesCliTurn({
-    prompt: 'hello',
-    hermesSessionId: null,
-    config: { ...configured(), command: fixture, workdir: dir },
-    signal: controller.signal,
-    env: { TMPDIR: dir },
-  });
-
-  const pidAppeared = await waitUntil(async () => {
-    try { Number(await (await import('node:fs/promises')).readFile(pidFile, 'utf8')); return true; } catch { return false; }
-  }, 4_000);
-  assert.ok(pidAppeared, 'fixture child started');
-  const pid = Number(await (await import('node:fs/promises')).readFile(pidFile, 'utf8'));
-  assert.ok(isAlive(pid), 'child is running before cancellation');
-
-  const startedAt = Date.now();
-  controller.abort(new Error('client disconnected'));
-  await assert.rejects(() => Promise.race([
-    turn,
-    new Promise((_, reject) => setTimeout(() => reject(new Error('turn was not cancelled')), 5_000)),
-  ]), error => /disconnect|abort|killed|terminated/i.test(String(error?.message || error?.code || '')));
-  const cancelMs = Date.now() - startedAt;
-  assert.ok(cancelMs < 4_000, `cancellation returned promptly (took ${cancelMs}ms)`);
-
-  const reaped = await waitUntil(() => !isAlive(pid), 4_000);
-  assert.ok(reaped, 'child process was actually killed — no orphan subprocess remains');
-  await rm(dir, { recursive: true, force: true });
-}, { timeout: 20_000 });
-
-test('a queued chat past the queue deadline is cleaned up with a sanitized timeout response and zero extra Hermes calls', async () => {
-  let clock = 0;
-  let started = 0;
-  let releaseActive;
-  const service = createHermesAgentService({
-    config: { ...configured(), timeoutMs: 50 },
-    randomToken: () => 'deadline-cookie',
-    now: () => clock,
-    runTurn: async () => {
-      started += 1;
-      return new Promise(resolve => { releaseActive = resolve; });
-    },
-  });
-  await service.unlock({ origin, accessCode });
-
-  const active = service.chat({ origin, cookieToken: 'deadline-cookie', payload: { message: 'wedge', ledger: [] } });
-  await new Promise(resolve => setImmediate(resolve));
-  assert.equal(started, 1);
-
-  const queued = service.chat({ origin, cookieToken: 'deadline-cookie', payload: { message: 'waiting', ledger: [] } });
-  await new Promise(resolve => setImmediate(resolve));
-  assert.equal(started, 1);
-
-  clock += 200; // past the 50ms queue deadline
-  // Attach the rejection expectation before the sweep runs so the expired
-  // request never counts as an unhandled rejection.
-  const expiryExpectation = assert.rejects(() => queued, error => {
-    assert.ok(error instanceof AgentGatewayError);
-    assert.equal(error.status, 503);
-    assert.match(error.message, /timed out|busy/i);
-    assert.doesNotMatch(error.message, /spawn|hermes|session|token|workdir|auth/i);
-    return true;
-  });
-  service.chat({ origin, cookieToken: 'deadline-cookie', payload: { message: 'sweep trigger', ledger: [] } }).catch(() => {});
-  await expiryExpectation;
-  assert.equal(started, 1, 'expired request never reached Hermes');
-  releaseActive({ reply: 'late but valid', sessionId: 'deadline_session_01' });
-  assert.match((await active).reply, /late but valid/);
-});

tests/analysis.test.js

@@ -37,14 +37,17 @@ test('validates a confident visual suggestion without inventing nonvisual fields
 });
 
 test('fails closed on a non-stool or low-confidence image', () => {
+  // abstainedFor names which abstention happened, so callers never have to parse prose.
   assert.deepEqual(parseVisionResponse({ isStool: false, confidence: 0.9 }), {
     status: 'needs_user_input',
     isStool: false,
+    abstainedFor: 'not_stool',
     reason: 'The image does not clearly show stool.',
   });
   assert.deepEqual(parseVisionResponse({ isStool: true, bristolType: 4, color: 'brown', confidence: 0.31 }), {
     status: 'needs_user_input',
     isStool: true,
+    abstainedFor: 'low_confidence',
     reason: 'The image is too uncertain to prefill safely.',
   });
 });
@@ -78,3 +81,53 @@ test('builds a structured multimodal request that forbids diagnosis and nonvisua
   assert.match(prompt, /not a diagnosis/i);
   assert.equal(body.messages[0].content.find(part => part.type === 'image_url').image_url.url, 'data:image/jpeg;base64,YQ==');
 });
+
+test('fails closed when a field the model did fill in is out of range while another field is blank', () => {
+  // Issue #73: the blank-first ordering let a blank field short-circuit the whole response, so a reply
+  // that carried an impossible value came back as `unusable_visual_fields` — telling the user the photo
+  // was unreadable when the model had in fact returned something Timmy must never apply. A blank field
+  // means "could not read it"; a filled-in field is a claim, and a claim outside the contract fails closed.
+  assert.throws(
+    () => parseVisionResponse({ isStool: true, bristolType: 9, color: null, confidence: 0.9, imageQuality: 'good', observations: 'Form read, colour not.' }),
+    (error) => {
+      assert.equal(error.code, 'invalid_fields', 'an out-of-range form next to a blank colour must fail closed');
+      return true;
+    },
+  );
+  assert.throws(
+    () => parseVisionResponse({ isStool: true, bristolType: null, color: 'purple', confidence: 0.9, imageQuality: 'good', observations: 'Colour read, form not.' }),
+    (error) => {
+      assert.equal(error.code, 'invalid_fields', 'an out-of-range colour next to a blank form must fail closed');
+      return true;
+    },
+  );
+});
+
+test('still abstains when the only filled-in visual field is inside the contract', () => {
+  // The complement of the rule above: a partial read that is entirely valid is an abstention, not a
+  // failure, so the glare path keeps returning 200 with nothing prefilled.
+  assert.deepEqual(parseVisionResponse({ isStool: true, bristolType: 4, color: null, confidence: 0.9, imageQuality: 'good', observations: 'Form read, colour not.' }), {
+    status: 'needs_user_input',
+    isStool: true,
+    abstainedFor: 'unusable_visual_fields',
+    reason: 'The photo does not show a form Timmy can read safely.',
+  });
+});
+
+test('abstains instead of failing when a schema-valid response carries no readable visual fields', () => {
+  // The declared JSON schema allows a null form and color whenever the model cannot read them,
+  // so a schema-valid response must come back as an abstention — never as a provider failure.
+  assert.deepEqual(parseVisionResponse({
+    isStool: true,
+    bristolType: null,
+    color: null,
+    confidence: 0.66,
+    imageQuality: 'poor',
+    observations: 'Large specular highlight hides the surface.',
+  }), {
+    status: 'needs_user_input',
+    isStool: true,
+    abstainedFor: 'unusable_visual_fields',
+    reason: 'The photo does not show a form Timmy can read safely.',
+  });
+});

tests/ci-workflow.test.js

@@ -20,7 +20,9 @@ test('Gitea CI gates pull requests and main with the reproducible quality suite'
   assert.match(workflow, /npm test/);
   assert.match(workflow, /npm run test:ui/);
   assert.match(workflow, /npm run test:photo/);
+  assert.match(workflow, /npm run test:mobile-capture/);
   assert.match(workflow, /npm run test:sleek/);
+  assert.match(workflow, /npm run test:manual-fallback/);
   assert.match(workflow, /npm audit --audit-level=high/);
   assert.match(workflow, /npm run check:syntax/);
   assert.match(workflow, /npm run check:diff/);
@@ -38,6 +40,44 @@ test('default unit suite includes the self-host bootstrap contract', async () =>
   assert.match(packageJson.scripts.test, /tests\/selfhost-bootstrap\.test\.js/);
 });
 
+test('default unit suite covers the manual fallback and draft contracts', async () => {
+  const packageJson = JSON.parse(await readFile(packagePath, 'utf8'));
+
+  assert.match(packageJson.scripts.test, /tests\/draft\.test\.js/);
+  assert.match(packageJson.scripts.test, /tests\/vision-readiness\.test\.js/);
+  assert.equal(packageJson.scripts['test:manual-fallback'], 'node tests/manual-fallback.acceptance.mjs');
+  assert.match(packageJson.scripts['check:syntax'], /node --check src\/draft\.js/);
+  assert.match(packageJson.scripts['check:syntax'], /node --check src\/vision-readiness\.js/);
+});
+
+test('provisional AI suggestion state is a unit-and-browser-gated contract', async () => {
+  const [packageJsonText, workflow] = await Promise.all([
+    readFile(packagePath, 'utf8'),
+    readFile(workflowPath, 'utf8'),
+  ]);
+  const packageJson = JSON.parse(packageJsonText);
+
+  assert.match(packageJson.scripts.test, /tests\/suggestion\.test\.js/);
+  assert.equal(packageJson.scripts['test:provisional'], 'node tests/provisional-suggestion.acceptance.mjs');
+  assert.match(packageJson.scripts['check:syntax'], /node --check src\/suggestion\.js/);
+  assert.match(packageJson.scripts['check:syntax'], /node --check tests\/provisional-suggestion\.acceptance\.mjs/);
+  assert.match(workflow, /npm run test:provisional/);
+});
+
+test('hard-stool follow-up is a unit-and-browser-gated safety contract', async () => {
+  const [packageJsonText, workflow] = await Promise.all([
+    readFile(packagePath, 'utf8'),
+    readFile(workflowPath, 'utf8'),
+  ]);
+  const packageJson = JSON.parse(packageJsonText);
+
+  assert.match(packageJson.scripts.test, /tests\/followup\.test\.js/);
+  assert.equal(packageJson.scripts['test:followup'], 'node tests/followup.acceptance.mjs');
+  assert.match(packageJson.scripts['check:syntax'], /node --check src\/followup\.js/);
+  assert.match(packageJson.scripts['check:syntax'], /node --check tests\/followup\.acceptance\.mjs/);
+  assert.match(workflow, /npm run test:followup/);
+});
+
 test('staging smoke is an explicit syntax-gated promotion command, never a PR network call', async () => {
   const [packageJson, workflow] = await Promise.all([
     readFile(packagePath, 'utf8').then(JSON.parse),
@@ -58,3 +98,79 @@ test('diff hygiene checks only the pull request or latest commit range', async (
   assert.match(script, /HEAD\^\.\.HEAD/);
   assert.doesNotMatch(script, /hash-object -t tree/);
 });
+
+test('the vision corpus and its refusal boundary are unit-, browser-, and release-gated', async () => {
+  const [packageJsonText, workflow, builder] = await Promise.all([
+    readFile(packagePath, 'utf8'),
+    readFile(workflowPath, 'utf8'),
+    readFile(new URL('../scripts/build_release.py', import.meta.url), 'utf8'),
+  ]);
+  const packageJson = JSON.parse(packageJsonText);
+
+  assert.match(packageJson.scripts.test, /tests\/vision-corpus\.test\.js/);
+  assert.match(packageJson.scripts.test, /tests\/vision-boundary\.test\.js/);
+  assert.equal(packageJson.scripts['test:vision-refusal'], 'node tests/vision-refusal.acceptance.mjs');
+  assert.match(packageJson.scripts['check:syntax'], /node --check src\/vision-corpus\.js/);
+  assert.match(packageJson.scripts['check:syntax'], /node --check tests\/vision-refusal\.acceptance\.mjs/);
+  assert.match(packageJson.scripts['check:syntax'], /py_compile[^&]*scripts\/build_vision_corpus\.py/);
+  assert.match(workflow, /npm run test:vision-refusal/);
+  // The release builder must verify the committed corpus hashes and run the refusal suite itself.
+  assert.match(builder, /"test:vision-refusal"/);
+  assert.match(builder, /"vision_corpus_refusal": "passed"/);
+  assert.match(builder, /build_vision_corpus\.py", "--verify"/);
+});
+
+test('the pinned worker container, post-load gate, and GPU benchmark are gated end to end', async () => {
+  const [packageJsonText, workflow, builder] = await Promise.all([
+    readFile(packagePath, 'utf8'),
+    readFile(workflowPath, 'utf8'),
+    readFile(new URL('../scripts/build_release.py', import.meta.url), 'utf8'),
+  ]);
+  const packageJson = JSON.parse(packageJsonText);
+
+  assert.match(packageJson.scripts.test, /tests\/worker-container\.test\.js/);
+  assert.match(packageJson.scripts.test, /tests\/worker-ready\.test\.js/);
+  assert.match(packageJson.scripts.test, /tests\/worker-benchmark\.test\.js/);
+  assert.equal(packageJson.scripts['test:worker-readiness'], 'node tests/worker-readiness.acceptance.mjs');
+  assert.match(packageJson.scripts['check:syntax'], /node --check scripts\/record_worker_benchmark\.mjs/);
+  assert.match(packageJson.scripts['check:syntax'], /node --check tests\/worker-readiness\.acceptance\.mjs/);
+  for (const script of ['scripts/worker_ready.sh', 'deploy/worker/entrypoint.sh', 'deploy/worker/build_image.sh', 'deploy/worker/run_worker_container.sh']) {
+    assert.ok(packageJson.scripts['check:syntax'].includes(`bash -n ${script}`), `${script} must be syntax-gated`);
+  }
+  assert.match(workflow, /npm run test:worker-readiness/);
+  assert.match(builder, /"test:worker-readiness"/);
+  assert.match(builder, /"worker_container_receipts": "passed"/);
+  assert.match(builder, /"worker_post_load_readiness": "passed"/);
+  assert.match(builder, /"scripts\/worker_ready\.sh"/);
+});
+
+test('explainable pattern summaries are a unit-, browser-, and release-gated contract', async () => {
+  const [packageJsonText, workflow, builder] = await Promise.all([
+    readFile(packagePath, 'utf8'),
+    readFile(workflowPath, 'utf8'),
+    readFile(new URL('../scripts/build_release.py', import.meta.url), 'utf8'),
+  ]);
+  const packageJson = JSON.parse(packageJsonText);
+
+  assert.match(packageJson.scripts.test, /tests\/summary\.test\.js/);
+  assert.equal(packageJson.scripts['test:pattern-summary'], 'node tests/pattern-summary.acceptance.mjs');
+  assert.match(packageJson.scripts['check:syntax'], /node --check src\/summary\.js/);
+  assert.match(packageJson.scripts['check:syntax'], /node --check tests\/pattern-summary\.acceptance\.mjs/);
+  assert.match(workflow, /npm run test:pattern-summary/);
+  assert.match(builder, /"test:pattern-summary"/);
+  assert.match(builder, /"longitudinal_pattern_summary": "passed"/);
+  assert.match(builder, /"src\/summary\.js"/);
+});
+
+test('the deterministic symptom escalation regression suite runs in the default unit gate', async () => {
+  const [packageJsonText, builder] = await Promise.all([
+    readFile(packagePath, 'utf8'),
+    readFile(new URL('../scripts/build_release.py', import.meta.url), 'utf8'),
+  ]);
+  const packageJson = JSON.parse(packageJsonText);
+
+  // Issue #21: the escalation boundary is only as good as the suite that is actually run.
+  assert.match(packageJson.scripts.test, /tests\/escalation-regression\.test\.js/);
+  assert.match(builder, /"src\/domain\.js"/);
+  assert.match(builder, /"src\/hermes-agent-service\.js"/);
+});

tests/draft.test.js

@@ -0,0 +1,54 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { createDraft, draftNotice, isDraftDirty } from '../src/draft.js';
+
+test('a fresh draft is empty and reports nothing to resume', () => {
+  const draft = createDraft();
+  assert.equal(isDraftDirty(draft), false);
+  assert.equal(draftNotice(draft), '');
+  assert.equal(draft.bristolType, 4);
+  assert.equal(draft.color, 'brown');
+  assert.deepEqual(draft.symptoms, {});
+});
+
+test('a fresh draft is independent so one log cannot leak into the next', () => {
+  const first = createDraft();
+  first.symptoms.blood = true;
+  first.note = 'leaked';
+  const second = createDraft();
+  assert.equal(second.symptoms.blood, undefined);
+  assert.equal(second.note, '');
+  assert.equal(isDraftDirty(second), false);
+});
+
+test('any user-entered context makes the draft worth resuming', () => {
+  const cases = [
+    [{ typeChosen: true, bristolType: 6 }, /type 6/i],
+    [{ note: 'After lunch' }, /note/i],
+    [{ urgency: 3 }, /urgency/i],
+    [{ discomfort: 2 }, /discomfort/i],
+    [{ photoDataUrl: 'data:image/jpeg;base64,abc' }, /photo/i],
+    [{ symptoms: { blood: true } }, /symptom/i],
+  ];
+  for (const [patch, expected] of cases) {
+    const draft = { ...createDraft(), ...patch };
+    assert.equal(isDraftDirty(draft), true, JSON.stringify(patch));
+    assert.match(draftNotice(draft), expected);
+  }
+});
+
+test('untouched defaults are not treated as user context', () => {
+  assert.equal(isDraftDirty({ ...createDraft(), bristolType: 7 }), false);
+  assert.equal(isDraftDirty({ ...createDraft(), color: 'brown', urgency: 0, discomfort: 0, note: '   ' }), false);
+  assert.equal(draftNotice({ ...createDraft(), color: 'brown' }), '');
+});
+
+test('a changed color is user context and unconfirmed AI defaults are not', () => {
+  assert.equal(isDraftDirty({ ...createDraft(), color: 'black' }), true);
+  assert.match(draftNotice({ ...createDraft(), color: 'black' }), /color/i);
+});
+
+test('draft copy never implies the photo or note left this device', () => {
+  const notice = draftNotice({ ...createDraft(), typeChosen: true, photoDataUrl: 'data:image/jpeg;base64,abc', note: 'x' });
+  assert.doesNotMatch(notice, /upload|server|sent|cloud/i);
+});

tests/escalation-regression.test.js

@@ -0,0 +1,274 @@
+// Issue #21 — deterministic symptom escalation regression suite.
+//
+// The product boundary is one-directional: model output and phrasing variety may never
+// suppress, soften, or delay an urgent-symptom escalation, and may never invent one from
+// the image. This suite pins that direction from three angles:
+//
+//   1. every red flag has positive and negative language coverage,
+//   2. model output can neither set nor clear a reported symptom, and
+//   3. the serious copy stays byte-identical when provider output is missing or malicious.
+import test from 'node:test';
+import assert from 'node:assert/strict';
+
+import { detectUrgentFlags, detectUrgentText, urgentChatMessage, urgentSymptomKeys } from '../src/domain.js';
+import { mergeVisualSuggestion, parseVisionResponse } from '../src/analysis.js';
+import { createHermesAgentService, resolveHermesAgentConfig } from '../src/hermes-agent-service.js';
+
+test('detects bleeding reported as wiping, toilet paper, or anatomy rather than the word "stool"', () => {
+  for (const message of [
+    'There is blood when I wipe',
+    'Bleeding when I wipe',
+    'I saw blood on the toilet paper',
+    'Bright red blood on the toilet paper',
+    'There is blood from my bottom',
+    'Bleeding from my back passage',
+    'There is blood in my rectum',
+    'There is blood mixed in my poo',
+    'I have diarrhea with blood',
+  ]) {
+    const result = detectUrgentText(message);
+    assert.equal(result.urgent, true, message);
+    assert.deepEqual(result.flags, ['blood'], message);
+  }
+});
+
+test('does not escalate bleeding wording that is not about the bowel', () => {
+  for (const message of [
+    'I got a paper cut and it is bleeding',
+    'My blood pressure was checked today',
+    'The ink is bleeding on the paper',
+    'I used a wipe on the kitchen counter',
+    'There is blood on my shirt from a nosebleed',
+  ]) {
+    assert.equal(detectUrgentText(message).urgent, false, message);
+  }
+});
+
+test('detects black, tarry, or dark-red stool reported without the exact phrase "black stool"', () => {
+  for (const message of [
+    'I have tarry stools',
+    'My stool looks like tar',
+    'I have black tarry poop',
+    'My poop is very dark red',
+    'My stool came out black',
+  ]) {
+    const result = detectUrgentText(message);
+    assert.equal(result.urgent, true, message);
+    assert.deepEqual(result.flags, ['blackOrDarkRed'], message);
+  }
+});
+
+test('does not escalate colour wording that is clothing, food, roadworks, or a verb', () => {
+  for (const message of [
+    'I wore black pants today',
+    'I had black beans for lunch',
+    'I drank dark red wine',
+    'I tarried too long at the shop',
+    'The road looks like tar',
+  ]) {
+    assert.equal(detectUrgentText(message).urgent, false, message);
+  }
+});
+
+test('detects reported fever language beyond the single word "fever"', () => {
+  for (const message of [
+    'my temperature is 103',
+    'I have a temperature of 38.5',
+    'I have a high temperature',
+    'I am running a temperature',
+  ]) {
+    assert.equal(detectUrgentText(message).urgent, true, message);
+    assert.deepEqual(detectUrgentText(message).flags, ['fever'], message);
+  }
+});
+
+test('does not escalate a normal or unrelated temperature reading', () => {
+  for (const message of [
+    'my temperature is 98.6',
+    'my temperature is 37',
+    'my temperature was checked at work',
+    'I keep a feverfew plant on the windowsill',
+  ]) {
+    assert.equal(detectUrgentText(message).urgent, false, message);
+  }
+});
+
+test('detects severe abdominal pain in every natural word order', () => {
+  for (const message of [
+    'I have severe pain in my belly',
+    'I have severe pain in my abdomen',
+    'The pain in my stomach is severe',
+    'My abdominal pain is constant and severe',
+    'I have severe stomach pain',
+  ]) {
+    assert.equal(detectUrgentText(message).urgent, true, message);
+    assert.deepEqual(detectUrgentText(message).flags, ['severePain'], message);
+  }
+});
+
+test('does not escalate severe pain that is not abdominal or not severe', () => {
+  for (const message of [
+    'I have severe pain in my knee',
+    'I have severe back pain',
+    'I have mild stomach pain',
+    'The abdominal pain is gone now',
+  ]) {
+    assert.equal(detectUrgentText(message).urgent, false, message);
+  }
+});
+
+test('detects reported inability to pass gas in the past tense and with slang', () => {
+  for (const message of [
+    'I am not passing any gas',
+    'I have not passed gas all day',
+    'I stopped passing gas',
+    'I cannot fart',
+    'I have not passed any wind',
+  ]) {
+    assert.equal(detectUrgentText(message).urgent, true, message);
+    assert.deepEqual(detectUrgentText(message).flags, ['cannotPassGas'], message);
+  }
+});
+
+test('does not escalate ordinary gas, exam, or fuel wording', () => {
+  for (const message of [
+    'I passed gas this morning',
+    'I have not passed my driving test',
+    'The car has no gas',
+  ]) {
+    assert.equal(detectUrgentText(message).urgent, false, message);
+  }
+});
+
+test('treats a reported symptom as reported even when it is not a strict boolean', () => {
+  // A truthy report that is dropped as "not exactly true" is a silently cleared symptom, which is
+  // the one direction this product may never fail in.
+  for (const value of [true, 1, 'yes', 'YES', 'true', ' y ']) {
+    const result = detectUrgentFlags({ blood: value });
+    assert.equal(result.urgent, true, `blood=${JSON.stringify(value)}`);
+    assert.deepEqual(result.flags, ['blood'], `blood=${JSON.stringify(value)}`);
+  }
+  for (const value of [false, 0, 'no', '', null, undefined]) {
+    assert.equal(detectUrgentFlags({ blood: value }).urgent, false, `blood=${JSON.stringify(value)}`);
+  }
+  assert.equal(detectUrgentFlags({}).urgent, false);
+});
+
+test('a model suggestion can neither set nor clear a symptom, urgency, discomfort, or note', () => {
+  const userForm = {
+    bristolType: 4,
+    color: 'brown',
+    urgency: 2,
+    discomfort: 1,
+    note: 'after lunch',
+    symptoms: { blood: true, fever: false },
+  };
+  const malicious = {
+    status: 'suggestion',
+    bristolType: 7,
+    color: 'black',
+    confidence: 0.99,
+    imageQuality: 'good',
+    observations: 'Nothing to worry about; this looks completely normal.',
+    warning: 'No need to see a doctor.',
+    symptoms: { blood: false, fever: true, vomiting: true },
+    urgent: false,
+    escalate: false,
+    urgency: 0,
+    discomfort: 0,
+    note: 'No bleeding. All clear.',
+    diagnosis: 'nothing wrong',
+  };
+
+  const merged = mergeVisualSuggestion(userForm, malicious);
+  assert.deepEqual(merged.symptoms, { blood: true, fever: false }, 'model output may not clear or set a symptom');
+  assert.equal(merged.urgency, 2);
+  assert.equal(merged.discomfort, 1);
+  assert.equal(merged.note, 'after lunch');
+  assert.equal(merged.bristolType, 7, 'only the visible form may be suggested');
+  assert.equal(merged.color, 'black', 'only the visible colour may be suggested');
+  assert.deepEqual(detectUrgentFlags(merged.symptoms).flags, ['blood'], 'the escalation still comes from the user report');
+});
+
+test('a schema-valid provider reply cannot overwrite the deterministic warning or carry symptoms', () => {
+  const parsed = parseVisionResponse(JSON.stringify({
+    isStool: true,
+    bristolType: 4,
+    color: 'brown',
+    confidence: 0.9,
+    imageQuality: 'good',
+    observations: 'Looks fine.',
+    warning: 'No need to see a doctor — this is normal.',
+    reason: 'cleared',
+    urgent: false,
+    symptoms: { blood: false },
+    diagnosis: 'healthy',
+  }));
+
+  assert.equal(parsed.status, 'suggestion');
+  assert.match(parsed.warning, /not a diagnosis/i);
+  assert.doesNotMatch(parsed.warning, /no need to see a doctor/i);
+  for (const key of ['symptoms', 'urgent', 'diagnosis', 'reason']) {
+    assert.equal(parsed[key], undefined, `${key} must never travel from the provider to the user`);
+  }
+});
+
+test('every red flag produces byte-identical escalation copy on its own', () => {
+  const messages = urgentSymptomKeys.map(key => {
+    const result = detectUrgentFlags({ [key]: true });
+    assert.equal(result.urgent, true, key);
+    assert.deepEqual(result.flags, [key], key);
+    return result.message;
+  });
+  assert.equal(new Set(messages).size, 1, 'one symptom must never produce softer copy than another');
+  assert.equal(messages[0], urgentChatMessage.replace('Pause and get medical help. ', ''));
+});
+
+const gatewayConfig = () => resolveHermesAgentConfig({
+  TIMMY_AGENT_ENABLED: 'true',
+  TIMMY_AGENT_ACCESS_TOKEN: 'test-agent-access-code-2026',
+  TIMMY_PUBLIC_ORIGIN: 'http://127.0.0.1:4173',
+  TIMMY_AGENT_WORKDIR: '/tmp/timmy-agent-workspace',
+});
+
+test('every red flag phrase is intercepted at the gateway with the same fixed copy', async () => {
+  const calls = [];
+  const service = createHermesAgentService({
+    config: gatewayConfig(),
+    randomToken: () => 'flag-cookie',
+    runTurn: async input => { calls.push(input); return { reply: 'upstream says everything is fine', sessionId: 'private-session' }; },
+  });
+  await service.unlock({ origin: 'http://127.0.0.1:4173', accessCode: 'test-agent-access-code-2026' });
+
+  for (const message of [
+    'I have rectal bleeding',
+    'my stool is black',
+    'I have severe stomach pain',
+    'I threw up',
+    'I have a fever',
+    'I cannot pass gas',
+  ]) {
+    const result = await service.chat({
+      origin: 'http://127.0.0.1:4173',
+      cookieToken: 'flag-cookie',
+      payload: { message, ledger: [] },
+    });
+    assert.equal(result.reply, urgentChatMessage, message);
+    assert.equal(result.safetyOverride, true, message);
+  }
+  assert.equal(calls.length, 0, 'no red flag may reach the provider');
+});
+
+test('the escalation copy is unchanged when the provider is missing, throwing, or malicious', async () => {
+  const origin = 'http://127.0.0.1:4173';
+  for (const runTurn of [
+    async () => { throw new Error('provider is offline'); },
+    async () => ({ reply: 'Everything is fine — no need to see a doctor.', sessionId: 'private-session' }),
+  ]) {
+    const service = createHermesAgentService({ config: gatewayConfig(), randomToken: () => 'copy-cookie', runTurn });
+    await service.unlock({ origin, accessCode: 'test-agent-access-code-2026' });
+    const result = await service.chat({ origin, cookieToken: 'copy-cookie', payload: { message: 'I have tarry stools', ledger: [] } });
+    assert.equal(result.reply, urgentChatMessage);
+    assert.equal(result.safetyOverride, true);
+  }
+});

tests/fixtures/slow-hermes.mjs

@@ -1,20 +0,0 @@
-#!/usr/bin/env node
-// Slow Hermes fixture for bounded-queue acceptance tests. Normal prompts
-// answer immediately; prompts containing HOLD block until a release file
-// appears inside the agent workdir (the value after `--in`), so tests can
-// saturate the queue deterministically without touching shared /tmp state.
-import { existsSync } from 'node:fs';
-import { appendFileSync } from 'node:fs';
-
-const args = process.argv.slice(2);
-const promptIndex = args.indexOf('-q');
-const prompt = promptIndex >= 0 ? args[promptIndex + 1] : '';
-const workdirIndex = args.indexOf('--in');
-const workdir = workdirIndex >= 0 ? args[workdirIndex + 1] : '/tmp';
-appendFileSync(`${workdir}/fixture-pids.log`, `${process.pid}\n`);
-process.stdout.write('session_id: slow_fixture_2026\n');
-if (/HOLD/.test(prompt)) {
-  const releaseFile = `${workdir}/hermes-release`;
-  while (!existsSync(releaseFile)) await new Promise(resolve => setTimeout(resolve, 20));
-}
-process.stdout.write('Hermes fixture answered the bounded request.\n');

tests/fixtures/vision-corpus/README.md

@@ -0,0 +1,55 @@
+# Vision corpus (issue #18)
+
+A committed, deterministic corpus that proves one claim on every run: **every reply Timmy receives is
+either a schema-valid visible-field suggestion or it fails closed.** Nothing is guessed, and a
+refusal never carries a form or a colour.
+
+## Licence and provenance
+
+- All fixtures are licensed **CC0-1.0**.
+- Every fixture is a synthetic image drawn from fixed integer math by
+  [`scripts/build_vision_corpus.py`](../../../scripts/build_vision_corpus.py). There is no camera, no
+  human subject, no third-party content, and no real medical imagery anywhere in this directory.
+- `manifest.json` records each fixture's `sha256`, byte length, provenance, licence, case class, the
+  provider reply it replays, and the outcome that reply must produce.
+- The hashes are an integrity receipt: `loadVisionCorpus()` refuses a fixture whose bytes no longer
+  match the manifest, so the corpus cannot be quietly edited into a different test.
+
+## Coverage
+
+| Case | Class | Replayed provider reply | Required outcome |
+|---|---|---|---|
+| `stool-like-formed` | stool | valid suggestion, confidence 0.83 | `suggestion` |
+| `non-stool-scene` | non-stool | `isStool: false` | `abstained` (`not_stool`) |
+| `blur-low-detail` | blur | confidence 0.41 | `abstained` (`low_confidence`) |
+| `glare-overexposed` | glare | schema-valid with null form and colour | `abstained` (`unusable_visual_fields`) |
+| `empty-bowl` | empty-bowl | `isStool: false` | `abstained` (`not_stool`) |
+| `malformed-response` | malformed-response | plain prose, not JSON | `fail_closed` (`unparsable_content`) |
+| `out-of-range-fields` | malformed-response | Bristol 9, colour `purple`, confidence 0.9 | `fail_closed` (`out_of_range_or_missing_fields`) |
+| `blank-plus-out-of-range` | malformed-response | Bristol 9 with a `null` colour, confidence 0.9 | `fail_closed` (`out_of_range_or_missing_fields`) |
+
+Both out-of-range cases keep `confidence` inside the contract on purpose: at `1.4` the reply died at the
+confidence gate, so the `out_of_range_or_missing_fields` label was credited to a guard the case never
+reached. `blank-plus-out-of-range` covers the reply shape that the blank-first ordering used to abstain on
+(issue #73) — a filled-in field is a claim, and a claim outside the contract fails closed even when the
+other field came back blank.
+
+## Where the corpus is enforced
+
+- `tests/vision-corpus.test.js` — corpus contract, hash integrity, and conformance of every reply.
+- `tests/vision-boundary.test.js` — the corpus replayed through the real provider call path and
+  through a running `server.mjs`, asserting status codes and that no image bytes or credentials
+  appear in a fail-closed body.
+- `tests/vision-refusal.acceptance.mjs` — the same refusals in a real browser.
+- `scripts/record_release_demo.mjs` — the release demo replays corpus cases through the real analysis
+  code path, so the video shows the status the server would actually send.
+
+## Regenerating
+
+```bash
+python3 scripts/build_vision_corpus.py            # rewrite fixtures and manifest.json
+python3 scripts/build_vision_corpus.py --verify   # verify committed fixtures against the manifest
+```
+
+The release builder runs `--verify` before anything is packaged. Regenerate deliberately and commit
+the new hashes; never hand-edit a fixture or a recorded reply.

tests/fixtures/vision-corpus/manifest.json

@@ -0,0 +1,136 @@
+{
+  "schemaVersion": 1,
+  "generator": "scripts/build_vision_corpus.py",
+  "license": "CC0-1.0",
+  "note": "Synthetic fixtures only. No real medical imagery, no personal data, and no third-party content.",
+  "cases": [
+    {
+      "id": "stool-like-formed",
+      "caseClass": "stool",
+      "file": "stool-like-formed.png",
+      "bytes": 2414,
+      "sha256": "4bb50ec6fc4ef7e9c83ed3b7ba69cdf5e73ef74b9f05e97898892bc852df970a",
+      "width": 640,
+      "height": 480,
+      "format": "png",
+      "synthetic": true,
+      "license": "CC0-1.0",
+      "provenance": "Synthetic fixture drawn deterministically by scripts/build_vision_corpus.py; no camera, no human subject, no third-party content.",
+      "expectedOutcome": "suggestion",
+      "expectedReason": "schema_valid_suggestion",
+      "providerContent": "{\"isStool\":true,\"bristolType\":4,\"color\":\"brown\",\"confidence\":0.83,\"imageQuality\":\"good\",\"observations\":\"Smooth, formed appearance.\"}"
+    },
+    {
+      "id": "non-stool-scene",
+      "caseClass": "non-stool",
+      "file": "non-stool-scene.png",
+      "bytes": 2406,
+      "sha256": "4d12150073856c1d7dfb9332049182ee0145da6ad50f6964a7273c8c61f21f91",
+      "width": 640,
+      "height": 480,
+      "format": "png",
+      "synthetic": true,
+      "license": "CC0-1.0",
+      "provenance": "Synthetic fixture drawn deterministically by scripts/build_vision_corpus.py; no camera, no human subject, no third-party content.",
+      "expectedOutcome": "abstained",
+      "expectedReason": "not_stool",
+      "providerContent": "{\"isStool\":false,\"bristolType\":null,\"color\":null,\"confidence\":0.97,\"imageQuality\":\"good\",\"observations\":\"Flatware on a tray.\"}"
+    },
+    {
+      "id": "blur-low-detail",
+      "caseClass": "blur",
+      "file": "blur-low-detail.png",
+      "bytes": 21598,
+      "sha256": "17000163662a42fd434bb2b2428d9e5a2156da08cbc82210e41dfc6fa7e24852",
+      "width": 640,
+      "height": 480,
+      "format": "png",
+      "synthetic": true,
+      "license": "CC0-1.0",
+      "provenance": "Synthetic fixture drawn deterministically by scripts/build_vision_corpus.py; no camera, no human subject, no third-party content.",
+      "expectedOutcome": "abstained",
+      "expectedReason": "low_confidence",
+      "providerContent": "{\"isStool\":true,\"bristolType\":4,\"color\":\"brown\",\"confidence\":0.41,\"imageQuality\":\"poor\",\"observations\":\"Form is unclear.\"}"
+    },
+    {
+      "id": "glare-overexposed",
+      "caseClass": "glare",
+      "file": "glare-overexposed.png",
+      "bytes": 3140,
+      "sha256": "1dc87a80951dd244c9831cba8b352e24718cf5f103f4dfd0a30e8c8c1c599f95",
+      "width": 640,
+      "height": 480,
+      "format": "png",
+      "synthetic": true,
+      "license": "CC0-1.0",
+      "provenance": "Synthetic fixture drawn deterministically by scripts/build_vision_corpus.py; no camera, no human subject, no third-party content.",
+      "expectedOutcome": "abstained",
+      "expectedReason": "unusable_visual_fields",
+      "providerContent": "{\"isStool\":true,\"bristolType\":null,\"color\":null,\"confidence\":0.66,\"imageQuality\":\"poor\",\"observations\":\"Large specular highlight hides the surface.\"}"
+    },
+    {
+      "id": "empty-bowl",
+      "caseClass": "empty-bowl",
+      "file": "empty-bowl.png",
+      "bytes": 3479,
+      "sha256": "ab443d1d9d28338e5c9f48054e7989cfce59ae25e2a9008be31cd9223be6abc4",
+      "width": 640,
+      "height": 480,
+      "format": "png",
+      "synthetic": true,
+      "license": "CC0-1.0",
+      "provenance": "Synthetic fixture drawn deterministically by scripts/build_vision_corpus.py; no camera, no human subject, no third-party content.",
+      "expectedOutcome": "abstained",
+      "expectedReason": "not_stool",
+      "providerContent": "{\"isStool\":false,\"bristolType\":null,\"color\":null,\"confidence\":0.93,\"imageQuality\":\"good\",\"observations\":\"Empty container.\"}"
+    },
+    {
+      "id": "malformed-response",
+      "caseClass": "malformed-response",
+      "file": "malformed-response.png",
+      "bytes": 2341,
+      "sha256": "634d16337879783b307d0ecf84348cfdc07950f6893095267901383f2efc83c2",
+      "width": 640,
+      "height": 480,
+      "format": "png",
+      "synthetic": true,
+      "license": "CC0-1.0",
+      "provenance": "Synthetic fixture drawn deterministically by scripts/build_vision_corpus.py; no camera, no human subject, no third-party content.",
+      "expectedOutcome": "fail_closed",
+      "expectedReason": "unparsable_content",
+      "providerContent": "Sure! It looks like a Type 4 to me. Hope that helps."
+    },
+    {
+      "id": "out-of-range-fields",
+      "caseClass": "malformed-response",
+      "file": "out-of-range-fields.png",
+      "bytes": 2375,
+      "sha256": "ac20ca9f3c9cbd118d3a2957110505d049a85861f97d361dcfbc4787960a5f8f",
+      "width": 640,
+      "height": 480,
+      "format": "png",
+      "synthetic": true,
+      "license": "CC0-1.0",
+      "provenance": "Synthetic fixture drawn deterministically by scripts/build_vision_corpus.py; no camera, no human subject, no third-party content.",
+      "expectedOutcome": "fail_closed",
+      "expectedReason": "out_of_range_or_missing_fields",
+      "providerContent": "{\"isStool\":true,\"bristolType\":9,\"color\":\"purple\",\"confidence\":0.9,\"imageQuality\":\"excellent\",\"observations\":\"Confident.\"}"
+    },
+    {
+      "id": "blank-plus-out-of-range",
+      "caseClass": "malformed-response",
+      "file": "blank-plus-out-of-range.png",
+      "bytes": 2403,
+      "sha256": "d45048cd1f5bfb1be1667238c9c21fca0cd1cae8b55e12d4f325203625eeafbd",
+      "width": 640,
+      "height": 480,
+      "format": "png",
+      "synthetic": true,
+      "license": "CC0-1.0",
+      "provenance": "Synthetic fixture drawn deterministically by scripts/build_vision_corpus.py; no camera, no human subject, no third-party content.",
+      "expectedOutcome": "fail_closed",
+      "expectedReason": "out_of_range_or_missing_fields",
+      "providerContent": "{\"isStool\":true,\"bristolType\":9,\"color\":null,\"confidence\":0.9,\"imageQuality\":\"good\",\"observations\":\"Form read, colour not.\"}"
+    }
+  ]
+}

tests/followup.acceptance.mjs

@@ -0,0 +1,104 @@
+import { chromium } from 'playwright';
+import assert from 'node:assert/strict';
+import { mkdir } from 'node:fs/promises';
+
+await mkdir('artifacts', { recursive: true });
+const browser = await chromium.launch({ headless: true });
+const context = await browser.newContext({ viewport: { width: 390, height: 844 }, deviceScaleFactor: 2, serviceWorkers: 'block' });
+const page = await context.newPage();
+const errors = [];
+page.on('console', message => { if (message.type() === 'error') errors.push(message.text()); });
+page.on('pageerror', error => errors.push(error.message));
+await page.route('**/api/vision-status', route => route.fulfill({
+  status: 200,
+  contentType: 'application/json',
+  body: JSON.stringify({ enabled: true, profile: 'selfhost', processor: 'self-hosted', model: 'SmolVLM2-2.2B-Instruct', providerReady: true, modelSeen: true }),
+}));
+await page.route('**/api/analyze', route => route.fulfill({
+  status: 200,
+  contentType: 'application/json',
+  body: JSON.stringify({
+    status: 'suggestion', isStool: true, bristolType: 2, color: 'brown', confidence: 0.71,
+    imageQuality: 'good', observations: 'Small, separate, hard-looking lumps.',
+    warning: 'Visual suggestion only. Confirm it yourself; this is not a diagnosis.',
+  }),
+}));
+
+await page.goto('http://127.0.0.1:4173', { waitUntil: 'networkidle' });
+await page.evaluate(() => localStorage.clear());
+await page.reload({ waitUntil: 'networkidle' });
+
+// 1. A hard/lumpy photo suggestion still contains only visible form, colour, and quality.
+await page.locator('[data-scan]').click();
+await page.getByText(/Self-hosted model ready/i).waitFor();
+await page.locator('#gallery-photo').setInputFiles('tests/fixtures/synthetic-type4.jpg');
+await page.locator('#ai-consent').check();
+await page.locator('#analyze-photo').click();
+const suggestion = page.locator('[data-provenance="pending"]');
+await suggestion.waitFor();
+const suggestionText = await suggestion.innerText();
+assert.match(suggestionText, /Type 2/);
+assert.doesNotMatch(suggestionText, /sore|dehydrat|tarry|difficult to pass|blood/i, 'the photo suggestion may never mention user-reported symptoms');
+
+// 2. Confirming the suggestion and moving to the safety step offers the follow-up for a hard form.
+await page.locator('#use-suggestion').click();
+await page.locator('#next').click();
+await page.locator('#next').click();
+const block = page.locator('[data-followup-block]');
+await block.waitFor();
+assert.equal(await block.count(), 1, 'a Bristol 2 entry asks the hard-stool follow-up');
+assert.equal(await page.locator('[data-followup]').count(), 10, 'five questions, each with an explicit yes and no');
+const askedIds = await page.locator('.followup-row').evaluateAll(rows => rows.map(row => row.dataset.question));
+assert.deepEqual(askedIds.sort(), ['bloodVisible', 'dehydration', 'difficultToPass', 'soreness', 'tarryBlack']);
+assert.match(await block.innerText(), /never (guesses|infers)/i, 'the copy states these are user-reported, never inferred');
+assert.equal(await page.locator('[data-followup].selected').count(), 0, 'no question may be pre-answered');
+assert.equal(await page.locator('#urgent-box .alert').count(), 0, 'an unanswered follow-up never escalates');
+assert.match(await page.locator('#followup-output').innerText(), /answer/i, 'the user is asked to answer rather than given invented findings');
+
+// 3. A mild hard-stool report gets proportionate non-diagnostic self-care and no escalation.
+for (const id of ['difficultToPass', 'soreness', 'dehydration']) await page.locator(`[data-followup="${id}"][data-answer="yes"]`).click();
+await page.locator('[data-followup="tarryBlack"][data-answer="no"]').click();
+await page.locator('[data-followup="bloodVisible"][data-answer="no"]').click();
+const guidance = page.locator('#followup-guidance');
+await guidance.waitFor();
+assert.match(await guidance.innerText(), /not a diagnosis/i);
+assert.match(await guidance.innerText(), /cannot rule out/i);
+assert.match(await guidance.innerText(), /bleeding/i);
+assert.match(await guidance.innerText(), /water|hydrat/i);
+assert.match(await guidance.innerText(), /strain/i);
+assert.equal(await page.locator('#urgent-box .alert').count(), 0, 'dark brown plus soreness must not escalate');
+await page.screenshot({ path: 'artifacts/followup-hard-stool-mobile.png' });
+
+// 4. Confirming truly black/tarry stool lands on the existing deterministic path.
+await page.locator('[data-followup="tarryBlack"][data-answer="yes"]').click();
+const alert = page.locator('#urgent-box .alert');
+await alert.waitFor();
+assert.match(await alert.innerText(), /Pause and get medical help\./);
+assert.equal(await page.locator('[data-symptom="blackOrDarkRed"]').isChecked(), true, 'the confirmed answer sets the app\'s own red-flag control');
+
+// 5. Clearing that answer clears the escalation instead of sticking.
+await page.locator('[data-followup="tarryBlack"][data-answer="no"]').click();
+assert.equal(await page.locator('#urgent-box .alert').count(), 0);
+assert.equal(await page.locator('[data-symptom="blackOrDarkRed"]').isChecked(), false);
+
+// 6. Visible blood is the other existing deterministic flag.
+await page.locator('[data-followup="bloodVisible"][data-answer="yes"]').click();
+await page.locator('#urgent-box .alert').waitFor();
+assert.equal(await page.locator('[data-symptom="blood"]').isChecked(), true);
+
+// 7. Non-hard forms never see the follow-up.
+await page.locator('#back').click();
+await page.locator('#back').click();
+await page.locator('[data-type="6"]').click();
+await page.locator('#next').click();
+await page.locator('#next').click();
+assert.equal(await page.locator('[data-followup-block]').count(), 0, 'loose forms are not asked hard-stool questions');
+assert.equal(await page.locator('[data-symptom="blood"]').isChecked(), true, 'an answer the user already confirmed is not silently dropped');
+assert.equal(await page.locator('#urgent-box .alert').count(), 1, 'the deterministic path still reflects that confirmed answer');
+await page.locator('[data-symptom="blood"]').uncheck();
+assert.equal(await page.locator('#urgent-box .alert').count(), 0, 'clearing the confirmed flag clears the escalation');
+
+assert.deepEqual(errors, []);
+await context.close();
+await browser.close();
+console.log('PASS hard-stool follow-up is user-reported, non-diagnostic for mild reports, and lands on the deterministic escalation path');

tests/followup.test.js

@@ -0,0 +1,122 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { detectUrgentFlags } from '../src/domain.js';
+import {
+  HARD_STOOL_QUESTIONS,
+  HARD_STOOL_TYPES,
+  createFollowUpAnswers,
+  evaluateHardStoolFollowUp,
+  isHardStoolForm,
+  needsHardStoolFollowUp,
+} from '../src/followup.js';
+
+// Field finding #67: after a hard/lumpy (Bristol 1-2) log, Timmy asks a short
+// user-reported follow-up. Nothing here may be inferred from the photo, dark brown
+// must never be silently escalated as black stool, and confirmed red flags must land
+// on the same deterministic escalation path the rest of the app already uses.
+
+const questionIds = () => HARD_STOOL_QUESTIONS.map((question) => question.id);
+
+test('the hard-stool follow-up only appears for Bristol 1 and 2', () => {
+  assert.deepEqual([...HARD_STOOL_TYPES], [1, 2]);
+  assert.equal(isHardStoolForm(1), true);
+  assert.equal(isHardStoolForm(2), true);
+  for (const type of [3, 4, 5, 6, 7]) assert.equal(isHardStoolForm(type), false, `Type ${type} is not hard/lumpy`);
+  assert.equal(isHardStoolForm(undefined), false);
+  assert.equal(isHardStoolForm('2'), true, 'a form value from the DOM is still the same form');
+  assert.equal(needsHardStoolFollowUp({ bristolType: 2 }), true);
+  assert.equal(needsHardStoolFollowUp({ bristolType: 4 }), false);
+  assert.equal(needsHardStoolFollowUp({}), false);
+});
+
+test('every follow-up question starts unanswered and is never pre-filled', () => {
+  const answers = createFollowUpAnswers();
+
+  assert.deepEqual(questionIds().slice().sort(), [
+    'bloodVisible',
+    'dehydration',
+    'difficultToPass',
+    'soreness',
+    'tarryBlack',
+  ]);
+  assert.equal(HARD_STOOL_QUESTIONS.length, 5);
+  for (const question of HARD_STOOL_QUESTIONS) {
+    assert.equal(answers[question.id], null, `${question.id} must start unanswered`);
+    assert.match(question.label, /was it|any |do you/i, `${question.id} must ask the user, not infer`);
+  }
+});
+
+test('an unanswered follow-up never escalates and never invents guidance', () => {
+  const verdict = evaluateHardStoolFollowUp(createFollowUpAnswers());
+
+  assert.equal(verdict.answered, false);
+  assert.equal(verdict.urgent, false);
+  assert.deepEqual(verdict.flags, []);
+  assert.equal(verdict.message, '');
+  assert.deepEqual(verdict.guidance, [], 'unanswered questions must not produce self-care copy');
+});
+
+test('a mild hard-stool report keeps non-diagnostic self-care and no escalation', () => {
+  const verdict = evaluateHardStoolFollowUp({
+    difficultToPass: true,
+    soreness: true,
+    bloodVisible: false,
+    tarryBlack: false,
+    dehydration: true,
+  });
+
+  assert.equal(verdict.answered, true);
+  assert.equal(verdict.urgent, false);
+  assert.deepEqual(verdict.flags, []);
+  assert.equal(verdict.message, '');
+  assert.ok(verdict.guidance.length >= 3, 'a mild report still gets proportionate self-care');
+  assert.equal(verdict.guidance.some((line) => /water|hydrat/i.test(line)), true);
+  assert.equal(verdict.guidance.some((line) => /strain/i.test(line)), true);
+});
+
+test('the mild guidance never implies the photo ruled out bleeding', () => {
+  const verdict = evaluateHardStoolFollowUp({ soreness: true, bloodVisible: false, tarryBlack: false });
+
+  assert.match(verdict.note, /not a diagnosis/i);
+  assert.match(verdict.note, /cannot rule out|did not rule out/i);
+  assert.match(verdict.note, /bleeding/i);
+  assert.doesNotMatch(verdict.note, /rules out|safe|cleared|no bleeding/i);
+});
+
+test('confirmed visible blood maps onto the existing deterministic blood red flag', () => {
+  const verdict = evaluateHardStoolFollowUp({ bloodVisible: true });
+
+  assert.equal(verdict.urgent, true);
+  assert.deepEqual(verdict.flags, ['blood']);
+  assert.equal(verdict.message, detectUrgentFlags({ blood: true }).message, 'urgent copy comes from the canonical path');
+  assert.deepEqual(verdict.guidance, [], 'escalation copy must not be softened with self-care');
+});
+
+test('confirmed black or tarry stool maps onto the existing deterministic blackOrDarkRed red flag', () => {
+  const verdict = evaluateHardStoolFollowUp({ tarryBlack: true });
+
+  assert.equal(verdict.urgent, true);
+  assert.deepEqual(verdict.flags, ['blackOrDarkRed']);
+  assert.equal(verdict.message, detectUrgentFlags({ blackOrDarkRed: true }).message);
+});
+
+test('dark brown is not silently escalated as black stool', () => {
+  const explicitDarkBrown = evaluateHardStoolFollowUp({ difficultToPass: true, tarryBlack: false });
+  const unansweredTarry = evaluateHardStoolFollowUp({ difficultToPass: true });
+  const colorAlone = evaluateHardStoolFollowUp({ color: 'black', note: 'dark brown' });
+
+  assert.equal(explicitDarkBrown.urgent, false, 'answering "dark brown" must not escalate');
+  assert.equal(unansweredTarry.urgent, false, 'an unanswered colour question is not a yes');
+  assert.equal(colorAlone.urgent, false, 'a draft colour value is never treated as a confirmed tarry finding');
+});
+
+test('an unanswered question is not silently treated as a no', () => {
+  const partial = evaluateHardStoolFollowUp({ soreness: true });
+
+  assert.equal(partial.answered, true);
+  assert.equal(partial.urgent, false);
+  assert.deepEqual(partial.flags, []);
+  assert.equal(partial.unanswered.length, 4, 'the verdict reports what the user still has not answered');
+  const all = evaluateHardStoolFollowUp({ bloodVisible: false, tarryBlack: false, soreness: false, difficultToPass: false, dehydration: false });
+  assert.deepEqual(all.unanswered, []);
+});

tests/helpers/vision-harness.mjs

@@ -0,0 +1,80 @@
+// Shared harness for driving the real /api/analyze boundary with recorded corpus responses.
+//
+// Nothing here fakes the application code: the test only decides which recorded provider
+// response a stub OpenAI-compatible worker returns, and then talks to the real server.
+import http from 'node:http';
+import { readFile } from 'node:fs/promises';
+import { spawn } from 'node:child_process';
+import { fileURLToPath } from 'node:url';
+import { join } from 'node:path';
+
+export const repoRoot = fileURLToPath(new URL('../..', import.meta.url));
+export const corpusDir = fileURLToPath(new URL('../fixtures/vision-corpus/', import.meta.url));
+export const CORPUS_MODEL = 'corpus-model';
+
+export function caseFor(corpus, id) {
+  const entry = corpus.cases.find(item => item.id === id);
+  if (!entry) throw new Error(`corpus case ${id} is missing`);
+  return entry;
+}
+
+export async function corpusPayload(entry) {
+  const bytes = await readFile(join(corpusDir, entry.file));
+  return { imageDataUrl: `data:image/png;base64,${bytes.toString('base64')}`, consent: true };
+}
+
+/** Stub OpenAI-compatible worker whose answer the test selects per request. */
+export function startProvider() {
+  const state = { content: '', requests: [] };
+  const server = http.createServer((req, res) => {
+    if (req.url.endsWith('/models')) {
+      res.writeHead(200, { 'content-type': 'application/json' });
+      return res.end(JSON.stringify({ data: [{ id: CORPUS_MODEL }] }));
+    }
+    let body = '';
+    req.on('data', chunk => { body += chunk; });
+    req.on('end', () => {
+      state.requests.push(body);
+      res.writeHead(200, { 'content-type': 'application/json' });
+      res.end(JSON.stringify({ choices: [{ message: { content: state.content } }] }));
+    });
+  });
+  return new Promise(resolve => server.listen(0, '127.0.0.1', () => resolve({
+    state,
+    port: server.address().port,
+    close: () => new Promise(done => server.close(done)),
+  })));
+}
+
+/** Real server.mjs, vision enabled, pointed at the stub worker. */
+export async function startServer({ providerPort, port = 4199 }) {
+  const child = spawn(process.execPath, ['server.mjs'], {
+    cwd: repoRoot,
+    env: {
+      ...process.env,
+      HOST: '127.0.0.1',
+      PORT: String(port),
+      TIMMY_VISION_ENABLED: 'true',
+      TIMMY_VISION_PROFILE: 'selfhost',
+      TIMMY_VISION_BASE_URL: `http://127.0.0.1:${providerPort}/v1`,
+      TIMMY_VISION_MODEL: CORPUS_MODEL,
+      TIMMY_VISION_TIMEOUT_MS: '5000',
+    },
+    stdio: ['ignore', 'pipe', 'pipe'],
+  });
+  for (let attempt = 0; attempt < 80; attempt += 1) {
+    try {
+      const probe = await fetch(`http://127.0.0.1:${port}/api/healthz`);
+      if (probe.ok) return child;
+    } catch {}
+    await new Promise(resolve => setTimeout(resolve, 100));
+  }
+  child.kill();
+  throw new Error('acceptance server did not become ready');
+}
+
+export async function stopServer(child) {
+  if (!child || child.exitCode !== null) return;
+  child.kill();
+  await new Promise(resolve => child.once('exit', resolve));
+}

tests/hermes-agent-service.test.js

@@ -149,6 +149,35 @@ test('authoritative chat service intercepts urgent message and ledger symptoms b
   }
 });
 
+test('ledger context keeps a symptom reported in any truthy shape instead of silently clearing it', async () => {
+  const calls = [];
+  const service = createHermesAgentService({
+    config: configured(),
+    randomToken: () => 'ledger-cookie',
+    runTurn: async input => { calls.push(input); return { reply: 'should not be reached', sessionId: 'private-session' }; },
+  });
+  await service.unlock({ origin, accessCode: 'test-agent-access-code-2026' });
+
+  // Issue #21: a browser-supplied ledger whose symptom is reported but not the literal boolean
+  // `true` used to be filtered out of the sanitized context, which cleared the symptom before the
+  // escalation check ever saw it.
+  const truthy = await service.chat({ origin, cookieToken: 'ledger-cookie', payload: {
+    message: 'What do my logs show?',
+    ledger: [{ bristolType: 4, color: 'brown', note: '', symptoms: { blood: 'yes' } }],
+  } });
+  assert.equal(calls.length, 0, 'a reported symptom must be intercepted before Hermes');
+  assert.equal(truthy.safetyOverride, true);
+  assert.match(truthy.reply, /medical help/i);
+
+  const cleared = await service.chat({ origin, cookieToken: 'ledger-cookie', payload: {
+    message: 'What do my logs show?',
+    ledger: [{ bristolType: 4, color: 'brown', note: '', symptoms: { blood: 'no', fever: false } }],
+  } });
+  assert.equal(cleared.safetyOverride, undefined);
+  assert.equal(calls.length, 1);
+  assert.match(calls[0].prompt, /"symptoms":\{\}/);
+});
+
 test('Hermes CLI parser accepts quiet output, strips control sequences, and rejects leaked metadata', () => {
   const parsed = parseHermesCliOutput('\u001b[32msession_id: 20260820_abcd\u001b[0m\nA concise answer.');
   assert.deepEqual(parsed, { sessionId: '20260820_abcd', reply: 'A concise answer.' });
@@ -193,21 +222,16 @@ test('Hermes child receives only an explicit non-secret environment allowlist',
   });
 });
 
-test('saturated turns queue within bounds and excess load fails closed without leaking process detail', async () => {
+test('upstream failures and concurrency fail closed without leaking process detail', async () => {
   let release;
   const runTurn = () => new Promise(resolve => { release = resolve; });
-  const service = createHermesAgentService({ config: { ...configured(), maxQueueDepth: 1 }, randomToken: () => 'browser-cookie', runTurn });
+  const service = createHermesAgentService({ config: configured(), randomToken: () => 'browser-cookie', runTurn });
   await service.unlock({ origin, accessCode: 'test-agent-access-code-2026' });
   const active = service.chat({ origin, cookieToken: 'browser-cookie', payload: { message: 'first', ledger: [] } });
   await new Promise(resolve => setImmediate(resolve));
-  const queued = service.chat({ origin, cookieToken: 'browser-cookie', payload: { message: 'second', ledger: [] } });
-  await new Promise(resolve => setImmediate(resolve));
-  await rejectsStatus(() => service.chat({ origin, cookieToken: 'browser-cookie', payload: { message: 'third', ledger: [] } }), 503);
-  release({ reply: 'first done', sessionId: 'private-session' });
-  assert.match((await active).reply, /first done/);
-  await new Promise(resolve => setImmediate(resolve));
-  release({ reply: 'queued done', sessionId: 'private-session' });
-  assert.match((await queued).reply, /queued done/);
+  await rejectsStatus(() => service.chat({ origin, cookieToken: 'browser-cookie', payload: { message: 'second', ledger: [] } }), 429);
+  release({ reply: 'done', sessionId: 'private-session' });
+  await active;
 
   const broken = createHermesAgentService({ config: configured(), randomToken: () => 'broken-cookie', runTurn: async () => { throw new Error('spawn /root/.hermes/auth.json SECRET'); } });
   await broken.unlock({ origin, accessCode: 'test-agent-access-code-2026' });

tests/inference-queue-cancellation.test.js

@@ -1,96 +0,0 @@
-import test from 'node:test';
-import assert from 'node:assert/strict';
-
-import { OverloadError, createInferenceQueue } from '../src/inference-queue.js';
-
-function deferred() {
-  let resolve;
-  let reject;
-  const promise = new Promise((res, rej) => { resolve = res; reject = rej; });
-  return { promise, resolve, reject };
-}
-
-test('a queued request past its deadline is expired deterministically and its place is reusable', async () => {
-  let clock = 0;
-  const queue = createInferenceQueue({ concurrency: 1, maxQueueDepth: 1, requestTimeoutMs: 100, now: () => clock });
-
-  const wedgeGate = deferred();
-  const active = queue.run(signal => {
-    return new Promise((resolve, reject) => {
-      signal.addEventListener('abort', () => reject(new Error('upstream aborted')));
-      wedgeGate.promise.then(resolve, reject);
-    });
-  });
-  active.catch(() => {});
-  await Promise.resolve();
-
-  let started = false;
-  const queued = queue.run(() => { started = true; return 'never'; });
-  await Promise.resolve();
-
-  clock += 150; // deadline (submitted at t=0, limit 100) has elapsed
-  const probe = queue.run(() => 'ok'); // queue activity triggers the deadline sweep
-
-  await assert.rejects(() => queued, error => {
-    assert.ok(error instanceof OverloadError);
-    assert.match(error.message, /timed out|busy/i);
-    return true;
-  });
-  assert.equal(started, false, 'the expired request must never reach the provider');
-
-  // Capacity is intact: cancelling the wedged holder lets the surviving request through.
-  queue.cancel(active, 'cleanup');
-  assert.equal(await Promise.race([probe, new Promise((_, reject) => setTimeout(() => reject(new Error('probe starved')), 200))]), 'ok');
-});
-
-test('client disconnect cancels a queued request before it reaches the provider', async () => {
-  let clock = 0;
-  const queue = createInferenceQueue({ concurrency: 1, maxQueueDepth: 2, requestTimeoutMs: 60_000, now: () => clock });
-
-  const wedgeGate = deferred();
-  const active = queue.run(() => wedgeGate.promise);
-  active.catch(() => {});
-  await Promise.resolve();
-
-  let sawStart = false;
-  const queued = queue.run(() => { sawStart = true; return 'too late'; });
-  await Promise.resolve();
-
-  queue.cancel(queued, 'client disconnected');
-  await assert.rejects(() => queued, error => error.message === 'client disconnected');
-  assert.equal(sawStart, false, 'cancelled request never invoked its task');
-
-  const admitted = queue.run(() => 'admitted-after-cancel');
-  wedgeGate.resolve('wedge-done');
-  assert.equal(await admitted, 'admitted-after-cancel');
-  assert.equal(await active, 'wedge-done');
-});
-
-test('cancelling an already-running task aborts its signal so buffers can be released', async () => {
-  let clock = 0;
-  const queue = createInferenceQueue({ concurrency: 1, maxQueueDepth: 1, requestTimeoutMs: 60_000, now: () => clock });
-
-  const observed = [];
-  const running = queue.run(async signal => {
-    observed.push(signal);
-    signal.addEventListener('abort', () => observed.push(`aborted:${signal.reason?.message ?? signal.reason}`));
-    await new Promise((resolve, reject) => {
-      signal.addEventListener('abort', () => reject(new Error('task stopped')));
-      setTimeout(resolve, 5_000);
-    });
-  });
-
-  // Let the wrapper admit the request and actually invoke the task body.
-  await Promise.resolve();
-  await Promise.resolve();
-  assert.equal(observed.length, 1, 'task is genuinely running before cancellation');
-
-  queue.cancel(running, 'stop');
-  await assert.rejects(() => running, /task stopped/);
-  assert.ok(observed[0] instanceof AbortSignal, 'task received a real AbortSignal');
-  assert.match(String(observed[1]), /stop/, 'running task observed the abort with its reason');
-
-  // The slot was released by the cancelled task, so the next request starts immediately.
-  const next = queue.run(() => 'next-runs');
-  assert.equal(await next, 'next-runs');
-});

tests/inference-queue.acceptance.mjs

@@ -1,136 +0,0 @@
-import test from 'node:test';
-import assert from 'node:assert/strict';
-import { chmod, mkdtemp, rm, readFile, writeFile } from 'node:fs/promises';
-import { spawn } from 'node:child_process';
-import { tmpdir } from 'node:os';
-import { join } from 'node:path';
-import { constants as fsConstants } from 'node:fs';
-import { fileURLToPath } from 'node:url';
-
-const root = fileURLToPath(new URL('..', import.meta.url));
-const fixture = fileURLToPath(new URL('./fixtures/slow-hermes.mjs', import.meta.url));
-const origin = 'http://127.0.0.1:4187';
-const accessCode = 'queue-acceptance-code-2026';
-
-async function waitReady(child) {
-  const deadline = Date.now() + 10_000;
-  while (Date.now() < deadline) {
-    if (child.exitCode !== null) throw new Error(`server exited ${child.exitCode}`);
-    try { const response = await fetch(`${origin}/api/healthz`); if (response.ok) return; } catch {}
-    await new Promise(resolve => setTimeout(resolve, 50));
-  }
-  throw new Error('server did not become ready');
-}
-
-function post(path, body, { cookie = '', signal } = {}) {
-  return fetch(`${origin}${path}`, {
-    method: 'POST',
-    headers: {
-      'content-type': 'application/json',
-      origin,
-      'sec-fetch-site': 'same-origin',
-      ...(cookie ? { cookie } : {}),
-    },
-    body: JSON.stringify(body),
-    signal,
-  }).then(
-    async response => ({ status: response.status, body: await response.json().catch(() => ({})) }),
-    error => ({ failed: true, reason: String(error?.name || error) }),
-  );
-}
-
-test('bounded queue end-to-end: disconnect cleanup, overload fallback, urgent bypass, recovery', async t => {
-  const workdir = await mkdtemp(join(tmpdir(), 'timmy-queue-accept-'));
-  const releaseFile = join(workdir, 'hermes-release');
-  const pidLog = join(workdir, 'fixture-pids.log');
-  await chmod(fixture, fsConstants.S_IRWXU);
-  const child = spawn(process.execPath, ['server.mjs'], {
-    cwd: root,
-    env: {
-      ...process.env,
-      PORT: '4187',
-      TIMMY_AGENT_ENABLED: 'true',
-      TIMMY_AGENT_ACCESS_TOKEN: accessCode,
-      TIMMY_PUBLIC_ORIGIN: origin,
-      TIMMY_AGENT_WORKDIR: workdir,
-      TIMMY_HERMES_COMMAND: fixture,
-      TIMMY_AGENT_MAX_CONCURRENT_TURNS: '1',
-      TIMMY_AGENT_MAX_QUEUE_DEPTH: '2',
-    },
-    stdio: ['ignore', 'pipe', 'pipe'],
-  });
-  let serverLogs = '';
-  child.stderr.on('data', chunk => { serverLogs += String(chunk); });
-  t.after(async () => {
-    child.kill('SIGTERM');
-    await rm(workdir, { recursive: true, force: true }).catch(() => {});
-    await rm(releaseFile, { force: true }).catch(() => {});
-  });
-  await waitReady(child);
-
-  // Authenticate once and keep the cookie for the whole scenario.
-  const rawResponse = await fetch(`${origin}/api/agent/unlock`, {
-    method: 'POST',
-    headers: { 'content-type': 'application/json', origin, 'sec-fetch-site': 'same-origin' },
-    body: JSON.stringify({ accessCode }),
-  });
-  assert.equal(rawResponse.status, 200);
-  const browserCookie = rawResponse.headers.get('set-cookie').split(';', 1)[0];
-
-  // Fill the slot: this HOLD runs until the fixture release file appears.
-  const heldOne = post('/api/agent/chat', { message: 'HOLD one', ledger: [] }, { cookie: browserCookie });
-  await new Promise(resolve => setTimeout(resolve, 400));
-
-  // 1. Disconnect cleanup: this request waits in the queue. When its client
-  //    vanishes, Timmy must drop it and free the queued place.
-  const disconnectController = new AbortController();
-  const doomed = post('/api/agent/chat', { message: 'HOLD doomed', ledger: [] }, { cookie: browserCookie, signal: disconnectController.signal });
-  await new Promise(resolve => setTimeout(resolve, 400));
-  disconnectController.abort();
-  const doomedOutcome = await doomed;
-  assert.equal(doomedOutcome.failed, true, 'abandoned client saw its request cancelled');
-
-  // If the freed place was reclaimed, both follow-up HOLDs are admitted
-  // (slot + queue of two minus one freed place). A sanitized 503 here would
-  // mean the cancelled client did not release capacity.
-  const heldTwo = post('/api/agent/chat', { message: 'HOLD two', ledger: [] }, { cookie: browserCookie });
-  const heldThree = post('/api/agent/chat', { message: 'HOLD three', ledger: [] }, { cookie: browserCookie });
-  await new Promise(resolve => setTimeout(resolve, 500));
-
-  // 2. Overload: everything is saturated now, so a further request must fail
-  //    fast with the stable manual-fallback copy and zero provider contact.
-  const overloadResult = await post('/api/agent/chat', { message: 'overload probe', ledger: [] }, { cookie: browserCookie });
-  assert.equal(overloadResult.status, 503);
-  assert.match(overloadResult.body.error, /busy|try again|manually/i);
-  assert.doesNotMatch(overloadResult.body.error, /spawn|hermes|session|token|workdir|fixture/i);
-
-  // 3. Urgent bypass while saturated: deterministic safety answer, zero calls.
-  const urgentResult = await post('/api/agent/chat', { message: 'I have rectal bleeding', ledger: [] }, { cookie: browserCookie });
-  assert.equal(urgentResult.status, 200);
-  assert.equal(urgentResult.body.safetyOverride, true);
-  assert.match(urgentResult.body.reply, /medical help/i);
-
-  // 4. Recovery: releasing the fixture lets every surviving request complete.
-  await writeFile(releaseFile, 'go');
-  for (const [label, promise] of [['one', heldOne], ['two', heldTwo], ['three', heldThree]]) {
-    const settled = await Promise.race([
-      promise,
-      new Promise(resolve => setTimeout(() => resolve({ status: 'TEST-TIMEOUT' }), 12_000)),
-    ]);
-    assert.equal(settled.status, 200, `${label} completed after recovery`);
-    assert.match(settled.body.reply, /bounded request/);
-    assert.doesNotMatch(JSON.stringify(settled.body), /slow_fixture_2026|session_id/);
-  }
-
-  // 5. No orphan subprocesses: every fixture PID recorded at spawn is gone.
-  await new Promise(resolve => setTimeout(resolve, 400));
-  const recordedPids = ((await readFile(pidLog, 'utf8').catch(() => '')) || '')
-    .split('\n').map(Number).filter(Boolean);
-  assert.equal(recordedPids.length, 3, `exactly three turns ran (saw ${recordedPids.length})`);
-  for (const pid of [...new Set(recordedPids)]) {
-    let alive = true;
-    try { process.kill(pid, 0); } catch { alive = false; }
-    assert.equal(alive, false, `fixture process ${pid} outlived its turn`);
-  }
-  assert.doesNotMatch(serverLogs, /access-code|secret|token/i);
-}, { timeout: 40_000 });

tests/inference-queue.test.js

@@ -1,72 +0,0 @@
-import test from 'node:test';
-import assert from 'node:assert/strict';
-
-import { OverloadError, createInferenceQueue } from '../src/inference-queue.js';
-
-function deferred() {
-  let resolve;
-  let reject;
-  const promise = new Promise((res, rej) => { resolve = res; reject = rej; });
-  return { promise, resolve, reject };
-}
-
-test('vision analysis runs with bounded concurrency and strict FIFO ordering', async () => {
-  let clock = 0;
-  const gates = new Map();
-  const started = [];
-  const queue = createInferenceQueue({ concurrency: 2, maxQueueDepth: 4, requestTimeoutMs: 10_000, now: () => clock });
-
-  const run = label => queue.run(signal => {
-    started.push(label);
-    const gate = deferred();
-    gates.set(label, gate);
-    gate.promise.catch(() => {});
-    return gate.promise;
-  });
-
-  const first = run('first');
-  const second = run('second');
-  const third = run('third');
-  const fourth = run('fourth');
-  while (started.length < 2) await Promise.resolve();
-  assert.deepEqual(started, ['first', 'second'], 'only concurrency slots start immediately');
-
-  gates.get('first').resolve({ ok: 'first' });
-  assert.equal((await first).ok, 'first');
-
-  // The slot freed by `first` must be granted to `third` (head of the queue).
-  while (!gates.has('third')) await Promise.resolve();
-  gates.get('third').resolve({ ok: 'third' });
-
-  // Only after `third` releases its slot may `fourth` start.
-  while (!gates.has('fourth')) await Promise.resolve();
-  gates.get('second').resolve({ ok: 'second' });
-  gates.get('fourth').resolve({ ok: 'fourth' });
-
-  assert.deepEqual(await Promise.all([second, third, fourth]), [{ ok: 'second' }, { ok: 'third' }, { ok: 'fourth' }]);
-  assert.equal(started.length, 4, 'every admitted request eventually started');
-  assert.deepEqual([...new Set(started)], ['first', 'second', 'third', 'fourth'], 'each queued request started exactly once');
-  assert.equal(started.indexOf('third') < started.indexOf('fourth'), true, 'queued requests were granted in FIFO order');
-});
-
-test('overloaded submissions fail fast with a stable sanitized manual-fallback error', async () => {
-  let clock = 0;
-  const gates = [];
-  const queue = createInferenceQueue({ concurrency: 1, maxQueueDepth: 1, requestTimeoutMs: 10_000, now: () => clock });
-
-  const hold = queue.run(() => { const gate = deferred(); gates.push(gate); gate.promise.catch(() => {}); return gate.promise; });
-  await Promise.resolve();
-  const held = queue.run(() => new Promise(() => {}));
-  await Promise.resolve();
-
-  await assert.rejects(() => queue.run(() => new Promise(() => {})), error => {
-    assert.ok(error instanceof OverloadError);
-    assert.match(error.message, /busy|full/i);
-    assert.doesNotMatch(error.message, /stack|internal|fetch|127\.0\.0\.1/i);
-    return true;
-  }, 'excess request beyond maxQueueDepth is rejected immediately');
-
-  // Active and already-queued work continues unaffected by the rejected submission.
-  gates[0].resolve('done');
-  assert.equal(await hold, 'done');
-});

tests/inference-zero-call.test.js

@@ -1,108 +0,0 @@
-import test from 'node:test';
-import assert from 'node:assert/strict';
-
-import { createHermesAgentService, resolveHermesAgentConfig } from '../src/hermes-agent-service.js';
-import { analyzePhoto } from '../src/vision-service.js';
-import { OverloadError, createInferenceQueue } from '../src/inference-queue.js';
-
-const origin = 'http://127.0.0.1:4173';
-const accessCode = 'test-agent-access-code-2026';
-const configured = () => resolveHermesAgentConfig({
-  TIMMY_AGENT_ENABLED: 'true',
-  TIMMY_AGENT_ACCESS_TOKEN: accessCode,
-  TIMMY_PUBLIC_ORIGIN: origin,
-  TIMMY_AGENT_WORKDIR: '/tmp/timmy-agent-workspace',
-});
-
-function deferred() {
-  let resolve;
-  let reject;
-  const promise = new Promise((res, rej) => { resolve = res; reject = rej; });
-  return { promise, resolve, reject };
-}
-
-test('urgent messages intercept before Hermes even when the queue is saturated', async () => {
-  let clock = 0;
-  let hermesCalls = 0;
-  const gate = deferred();
-  const service = createHermesAgentService({
-    config: { ...configured(), maxQueueDepth: 0 },
-    randomToken: () => 'urgent-cookie',
-    now: () => clock,
-    runTurn: async () => {
-      hermesCalls += 1;
-      return gate.promise;
-    },
-  });
-  await service.unlock({ origin, accessCode });
-
-  // Saturate the single slot so any queued path would be rejected as overloaded.
-  const active = service.chat({ origin, cookieToken: 'urgent-cookie', payload: { message: 'normal question', ledger: [] } });
-  await new Promise(resolve => setImmediate(resolve));
-  assert.equal(hermesCalls, 1);
-
-  const urgent = await service.chat({ origin, cookieToken: 'urgent-cookie', payload: { message: 'I have rectal bleeding', ledger: [] } });
-
-  assert.equal(hermesCalls, 1, 'Hermes was called exactly once — only for the non-urgent request');
-  assert.equal(urgent.safetyOverride, true);
-  assert.match(urgent.reply, /medical help/i);
-  gate.resolve({ reply: 'late', sessionId: 'urgent_session_01' });
-  assert.match((await active).reply, /late/);
-});
-
-test('vision analysis is bounded by the shared queue and overload returns the manual-fallback copy', async () => {
-  let clock = 0;
-  let providerCalls = 0;
-  const gates = [];
-  const queue = createInferenceQueue({ concurrency: 1, maxQueueDepth: 1, requestTimeoutMs: 60_000, now: () => clock });
-
-  const visionFetch = async (url, options) => {
-    providerCalls += 1;
-    const gate = deferred();
-    gates.push(gate);
-    options.signal?.addEventListener('abort', () => gate.reject(new Error('aborted')));
-    return new Promise((resolve, reject) => {
-      gate.promise.then(() => resolve({ ok: true, json: async () => ({ choices: [{ message: { content: JSON.stringify({ isStool: true, bristolType: 4, color: 'brown', confidence: 0.8, imageQuality: 'good', observations: 'ok' }) } }] }) }), reject);
-    });
-  };
-
-  const payload = { imageDataUrl: 'data:image/jpeg;base64,YQ==', consent: true };
-  const config = { baseUrl: 'http://127.0.0.1:8645/v1', apiKey: 'test-key-not-real', model: 'm' };
-
-  const first = queue.run(signal => analyzePhoto({ payload, fetchImpl: visionFetch, config, signal }));
-  while (providerCalls < 1) await Promise.resolve();
-  const second = queue.run(signal => analyzePhoto({ payload, fetchImpl: visionFetch, config, signal }));
-  await Promise.resolve();
-
-  await assert.rejects(() => queue.run((signal) => analyzePhoto({ payload, fetchImpl: visionFetch, config, signal })), error => {
-    assert.ok(error instanceof OverloadError);
-    assert.match(error.message, /continue manually/i);
-    assert.doesNotMatch(error.message, /api|key|token|127\.0\.0\.1|fetch/i);
-    return true;
-  }, 'third request beyond depth is overloaded with sanitized copy');
-
-  assert.equal(providerCalls, 1, 'overloaded request never reached the provider');
-  gates[0].resolve('go');
-  const result = await Promise.race([first, new Promise(resolve => setTimeout(() => resolve('pending'), 100))]);
-  assert.notEqual(result, 'pending');
-});
-
-test('vision requests carry cancellation so disconnected clients release provider work', async () => {
-  let capturedSignal;
-  const controller = new AbortController();
-  const gate = deferred();
-  const fetchImpl = async (url, options) => {
-    capturedSignal = options.signal;
-    options.signal?.addEventListener('abort', () => gate.reject(new Error('aborted')));
-    return gate.promise;
-  };
-  const payload = { imageDataUrl: 'data:image/jpeg;base64,YQ==', consent: true };
-  const config = { baseUrl: 'http://127.0.0.1:8645/v1', apiKey: 'test-key-not-real', model: 'm' };
-
-  const attempt = analyzePhoto({ payload, fetchImpl, config, signal: controller.signal });
-  while (!capturedSignal) await Promise.resolve();
-
-  controller.abort(new Error('client disconnected'));
-  await assert.rejects(() => attempt, /continue manually|unavailable/i);
-  assert.equal(capturedSignal.aborted, true, 'the provider fetch observed the cancellation');
-});

tests/manual-fallback.acceptance.mjs

@@ -0,0 +1,78 @@
+import { chromium } from 'playwright';
+import assert from 'node:assert/strict';
+import { mkdir } from 'node:fs/promises';
+
+await mkdir('artifacts', { recursive: true });
+const browser = await chromium.launch({ headless: true });
+const context = await browser.newContext({ viewport: { width: 390, height: 844 }, deviceScaleFactor: 2, serviceWorkers: 'block' });
+const page = await context.newPage();
+const errors = [];
+page.on('console', message => { if (message.type() === 'error') errors.push(message.text()); });
+page.on('pageerror', error => errors.push(error.message));
+let analysisRequests = 0;
+await page.route('**/api/vision-status', route => route.fulfill({
+  status: 200,
+  contentType: 'application/json',
+  body: JSON.stringify({ enabled: true, profile: 'selfhost', processor: 'self-hosted', model: 'SmolVLM2-2.2B-Instruct', providerReady: false, modelSeen: false }),
+}));
+await page.route('**/api/analyze', route => { analysisRequests += 1; return route.abort(); });
+
+await page.goto('http://127.0.0.1:4173', { waitUntil: 'networkidle' });
+await page.evaluate(() => localStorage.clear());
+await page.reload({ waitUntil: 'networkidle' });
+
+// 1. Provider down: manual Bristol entry must be reachable in one action, with no dead control.
+await page.locator('[data-scan]').click();
+await page.getByText(/Vision worker offline/i).waitFor();
+assert.equal(await page.locator('#analyze-photo').count(), 0, 'offline flow must not offer a dead analyze control');
+const pickFallback = page.locator('#manual-from-scan');
+assert.equal(await pickFallback.isVisible(), true);
+assert.match(await pickFallback.innerText(), /without AI|manual/i);
+await pickFallback.click();
+assert.equal(await page.getByText('Pick the closest form').isVisible(), true, 'one action reaches manual Bristol entry');
+assert.equal(analysisRequests, 0, 'the offline path never uploads a photo');
+await page.screenshot({ path: 'artifacts/manual-fallback-offline-mobile.png' });
+
+// 2. Provider down after a photo is chosen: the ready step still offers the one-action manual path.
+await page.locator('#close-sheet').click();
+await page.locator('[data-scan]').click();
+await page.getByText(/Vision worker offline/i).waitFor();
+await page.locator('#gallery-photo').setInputFiles('tests/fixtures/synthetic-type4.jpg');
+await page.getByText(/Ready for your review/i).waitFor();
+assert.equal(await page.locator('.consent-card').count(), 0, 'no consent is requested when the worker cannot analyze');
+assert.equal(await page.locator('#analyze-photo').count(), 0, 'no dead analyze control on the ready step');
+const readyFallback = page.locator('#manual-from-scan');
+assert.equal(await readyFallback.isVisible(), true);
+await readyFallback.click();
+assert.equal(await page.getByText('Pick the closest form').isVisible(), true, 'ready-step offline path is still one action');
+assert.equal(analysisRequests, 0, 'a chosen photo is never uploaded when analysis is unavailable');
+await page.screenshot({ path: 'artifacts/manual-fallback-ready-offline-mobile.png' });
+
+// 3. Entered context and the chosen photo survive recoverable navigation.
+await page.locator('[data-type="6"]').click();
+await page.locator('#next').click();
+await page.locator('#urgency').fill('3');
+await page.locator('#note').fill('After lunch');
+await page.locator('#close-sheet').click();
+await page.locator('[data-view="calendar"]').first().click();
+await page.locator('[data-view="home"]').first().click();
+await page.locator('[data-log]').first().click();
+
+assert.match(await page.locator('.draft-resume').innerText(), /draft kept/i);
+assert.equal(await page.locator('.draft-resume').innerText().then(t => /Type 6/i.test(t)), true);
+assert.equal(await page.locator('[data-type="6"]').getAttribute('class').then(v => v.includes('selected')), true, 'chosen type is restored');
+await page.locator('#next').click();
+assert.equal(await page.locator('#urgency').inputValue(), '3', 'urgency is restored');
+assert.equal(await page.locator('#note').inputValue(), 'After lunch', 'note is restored');
+await page.screenshot({ path: 'artifacts/draft-resumed-mobile.png' });
+
+// 4. Start over clears the retained draft so nothing lingers silently.
+await page.locator('#discard-draft').click();
+assert.equal(await page.locator('.draft-resume').count(), 0);
+assert.equal(await page.locator('[data-type="4"]').getAttribute('class').then(v => v.includes('selected')), true, 'start over returns to an empty draft');
+assert.equal(await page.locator('#note').count(), 0, 'the draft is back at step 1');
+
+assert.deepEqual(errors, []);
+await context.close();
+await browser.close();
+console.log('PASS offline one-action manual fallback, no dead controls, and resumable draft with explicit start over');

tests/mobile-capture.acceptance.mjs

@@ -0,0 +1,61 @@
+import { chromium } from 'playwright';
+import assert from 'node:assert/strict';
+
+const browser = await chromium.launch({ headless: true });
+const viewports = [
+  { name: '390x844', width: 390, height: 844 },
+  { name: 'iPhone 15 class', width: 393, height: 852 },
+];
+
+for (const viewport of viewports) {
+  const context = await browser.newContext({
+    viewport: { width: viewport.width, height: viewport.height },
+    deviceScaleFactor: 2,
+    serviceWorkers: 'block',
+  });
+  const page = await context.newPage();
+  let analysisRequests = 0;
+  await page.route('**/api/vision-status', route => route.fulfill({
+    status: 200,
+    contentType: 'application/json',
+    // The fixture mirrors the real /api/vision-status contract, which reports whether the pinned
+    // model was actually seen loaded (#15) alongside provider reachability.
+    body: JSON.stringify({ enabled: true, profile: 'selfhost', providerReady: true, modelSeen: true, model: 'synthetic-test-model' }),
+  }));
+  await page.route('**/api/analyze', route => {
+    analysisRequests += 1;
+    return route.abort();
+  });
+
+  await page.goto('http://127.0.0.1:4173', { waitUntil: 'networkidle' });
+  await page.locator('[data-scan]').click();
+
+  const camera = page.locator('#camera-photo');
+  const gallery = page.locator('#gallery-photo');
+  assert.equal(await camera.getAttribute('capture'), 'environment', `${viewport.name}: camera input uses the rear camera`);
+  assert.equal(await gallery.getAttribute('capture'), null, `${viewport.name}: gallery input does not force camera capture`);
+  assert.equal(await page.getByText('Take photo', { exact: true }).isVisible(), true);
+  assert.equal(await page.getByText('Choose from gallery', { exact: true }).isVisible(), true);
+
+  await camera.dispatchEvent('cancel');
+  assert.match(await page.locator('[role="status"]').innerText(), /camera.*closed|permission.*denied/i);
+  assert.equal(await page.getByText('Continue without AI', { exact: true }).isVisible(), true);
+  assert.equal(analysisRequests, 0, `${viewport.name}: cancellation never uploads`);
+
+  await page.locator('#gallery-photo').setInputFiles({
+    name: 'corrupt-synthetic.jpg',
+    mimeType: 'image/jpeg',
+    buffer: Buffer.from('not an image'),
+  });
+  assert.match(await page.locator('.scan-result').innerText(), /could not be read/i);
+  await page.getByText('Try another photo', { exact: true }).click();
+  await page.locator('#gallery-photo').setInputFiles('tests/fixtures/synthetic-type4.jpg');
+  assert.equal(await page.locator('#analyze-photo').isDisabled(), true);
+  assert.equal(await page.locator('#retake-photo').isVisible(), true);
+  assert.equal(analysisRequests, 0, `${viewport.name}: corrupt and unconsented photos never upload`);
+
+  await context.close();
+}
+
+await browser.close();
+console.log('PASS camera/gallery paths recover from cancellation at 390x844 and iPhone-class viewport without upload');

tests/pattern-summary.acceptance.mjs

@@ -0,0 +1,88 @@
+import { chromium } from 'playwright';
+import assert from 'node:assert/strict';
+import { mkdir } from 'node:fs/promises';
+
+// Issue #34: every longitudinal summary line must point at the confirmed records behind it, and a
+// sparse window must say so instead of describing a trend. The records are fictional sample entries
+// written into the app's own local ledger contract; no real health data is involved.
+const DAY = 86400000;
+const sample = (id, daysAgo, bristolType) => ({
+  id,
+  occurredAt: new Date(Date.now() - daysAgo * DAY).toISOString(),
+  bristolType,
+  color: 'brown',
+  urgency: 1,
+  discomfort: 1,
+  note: '',
+  photoDataUrl: '',
+  symptoms: {},
+});
+
+await mkdir('artifacts', { recursive: true });
+const browser = await chromium.launch({ headless: true });
+const context = await browser.newContext({ viewport: { width: 390, height: 844 }, deviceScaleFactor: 2, serviceWorkers: 'block' });
+const page = await context.newPage();
+const errors = [];
+page.on('console', message => { if (message.type() === 'error') errors.push(message.text()); });
+page.on('pageerror', error => errors.push(error.message));
+
+const seed = async entries => page.evaluate(list => {
+  const base = document.querySelector('meta[name="timmy-base-path"]')?.content || '/';
+  localStorage.setItem(`timmy:${base}:ledger-v1`, JSON.stringify(list));
+}, entries);
+
+await page.goto('http://127.0.0.1:4173', { waitUntil: 'networkidle' });
+await page.evaluate(() => localStorage.clear());
+
+// 1. A sparse window refuses to describe a pattern.
+await seed([sample('sparse-a', 1, 4), sample('sparse-b', 4, 6)]);
+await page.reload({ waitUntil: 'networkidle' });
+const sparse = page.locator('[data-summary-insufficient]');
+assert.equal(await sparse.count(), 1, 'a window below the minimum must show honest insufficient-data copy');
+assert.match(await sparse.innerText(), /not enough confirmed logs/i);
+assert.match(await sparse.innerText(), /2 of 3/);
+assert.equal(await page.locator('[data-statement]').count(), 0, 'no pattern line may be claimed from two logs');
+await page.screenshot({ path: 'artifacts/pattern-summary-insufficient-mobile.png' });
+
+// 2. A populated window renders explainable lines, each citing its own records.
+const seeded = [
+  sample('rec-firm', 2, 1),
+  sample('rec-typical-1', 5, 3),
+  sample('rec-typical-2', 9, 4),
+  sample('rec-typical-3', 12, 4),
+  sample('rec-old', 40, 6),
+];
+await seed(seeded);
+await page.reload({ waitUntil: 'networkidle' });
+
+const card = page.locator('[data-pattern-summary]');
+assert.equal(await card.count(), 1, 'the home insight card is the explainable summary');
+assert.match(await page.locator('[data-summary-window]').innerText(), /last 28 days/i);
+assert.match(await page.locator('[data-statement="frequency"]').innerText(), /4 confirmed logs/);
+assert.equal(await page.locator('[data-statement="firm"]').getAttribute('data-records'), '1');
+assert.equal(await page.locator('[data-statement="typical"]').getAttribute('data-records'), '3');
+// The out-of-window log is neither counted nor offered as a citation.
+assert.doesNotMatch(await card.innerText(), /5 confirmed logs/);
+await page.screenshot({ path: 'artifacts/pattern-summary-home-mobile.png' });
+
+// 3. Following a citation shows exactly the contributing confirmed records.
+await page.locator('[data-statement-link="typical"]').click();
+const records = page.locator('[data-summary-records]');
+await records.waitFor();
+assert.equal(await page.locator('[data-summary-record]').count(), 3, 'the citation lists exactly its own records');
+const listed = await page.locator('[data-summary-record]').evaluateAll(nodes => nodes.map(node => node.getAttribute('data-entry-id')));
+assert.deepEqual(listed.sort(), ['rec-typical-1', 'rec-typical-2', 'rec-typical-3']);
+assert.match(await records.innerText(), /Type 3/);
+assert.match(await records.innerText(), /These are the confirmed logs this line was built from/);
+await page.screenshot({ path: 'artifacts/pattern-summary-records-mobile.png' });
+await page.locator('#pattern-records-close').click();
+assert.equal(await page.locator('[data-summary-records]').count(), 0, 'the citation sheet closes cleanly');
+
+// 4. The summary never explains a cause or clears a food.
+const summaryText = await card.innerText();
+assert.doesNotMatch(summaryText, /because|due to|caused|safe to eat|avoid eating|should eat|diagnos/i);
+
+assert.deepEqual(errors, []);
+await context.close();
+await browser.close();
+console.log('PASS longitudinal pattern summaries cite their confirmed records and refuse to describe a sparse window');

tests/photo-first.acceptance.mjs

@@ -31,7 +31,7 @@ await page.locator('[data-scan]').click();
 await page.getByText(/Self-hosted model ready/i).waitFor();
 await page.screenshot({ path: 'artifacts/selfhost-photo-first-mobile.png', fullPage: false });
 assert.equal(await page.getByText('One photo. Two useful suggestions.').isVisible(), true);
-await page.locator('#ai-photo').setInputFiles('tests/fixtures/synthetic-type4.jpg');
+await page.locator('#gallery-photo').setInputFiles('tests/fixtures/synthetic-type4.jpg');
 assert.equal(await page.locator('#analyze-photo').isDisabled(), true);
 assert.match(await page.locator('.consent-card').innerText(), /self-hosted model server/i);
 assert.doesNotMatch(await page.locator('.consent-card').innerText(), /provider’s terms/i);

tests/provisional-suggestion.acceptance.mjs

@@ -0,0 +1,95 @@
+import { chromium } from 'playwright';
+import assert from 'node:assert/strict';
+import { mkdir } from 'node:fs/promises';
+
+await mkdir('artifacts', { recursive: true });
+const browser = await chromium.launch({ headless: true });
+const context = await browser.newContext({ viewport: { width: 390, height: 844 }, deviceScaleFactor: 2, serviceWorkers: 'block' });
+const page = await context.newPage();
+const errors = [];
+page.on('console', message => { if (message.type() === 'error') errors.push(message.text()); });
+page.on('pageerror', error => errors.push(error.message));
+await page.route('**/api/vision-status', route => route.fulfill({
+  status: 200,
+  contentType: 'application/json',
+  body: JSON.stringify({ enabled: true, profile: 'selfhost', processor: 'self-hosted', model: 'SmolVLM2-2.2B-Instruct', providerReady: true, modelSeen: true }),
+}));
+await page.route('**/api/analyze', route => route.fulfill({
+  status: 200,
+  contentType: 'application/json',
+  body: JSON.stringify({
+    status: 'suggestion', isStool: true, bristolType: 4, color: 'brown', confidence: 0.83,
+    imageQuality: 'good', observations: 'Smooth, formed appearance.',
+    warning: 'Visual suggestion only. Confirm it yourself; this is not a diagnosis.',
+  }),
+}));
+
+await page.goto('http://127.0.0.1:4173', { waitUntil: 'networkidle' });
+await page.evaluate(() => localStorage.clear());
+await page.reload({ waitUntil: 'networkidle' });
+
+// 1. The AI suggestion is visibly provisional and its screen-reader copy states confidence and user control.
+await page.locator('[data-scan]').click();
+await page.getByText(/Self-hosted model ready/i).waitFor();
+await page.locator('#gallery-photo').setInputFiles('tests/fixtures/synthetic-type4.jpg');
+await page.locator('#ai-consent').check();
+await page.locator('#analyze-photo').click();
+await page.getByText(/83% confidence/i).waitFor();
+
+const suggested = page.locator('[data-provenance="pending"]');
+assert.equal(await suggested.count(), 1, 'the AI result is a distinct provisional state');
+assert.match(await suggested.innerText(), /AI SUGGESTION/);
+const suggestedAria = await suggested.getAttribute('aria-label');
+assert.match(suggestedAria, /83 percent confidence/i, 'screen-reader copy states the AI confidence');
+assert.match(suggestedAria, /not saved until you confirm/i, 'screen-reader copy states that the user is in control');
+await page.screenshot({ path: 'artifacts/provisional-suggestion-pending-mobile.png' });
+
+// 2. Confirming the suggestion produces a different, clearly labelled state.
+await page.locator('#use-suggestion').click();
+const confirmed = page.locator('[data-provenance="confirmed"]');
+assert.equal(await confirmed.count(), 1, 'confirmation is a distinct state from the raw suggestion');
+assert.equal(await page.locator('[data-provenance="pending"]').count(), 0);
+assert.match(await confirmed.innerText(), /AI PREFILLED/);
+assert.match(await confirmed.locator('[role="status"]').innerText(), /you confirmed/i);
+await page.screenshot({ path: 'artifacts/provisional-suggestion-confirmed-mobile.png' });
+
+// 3. User context entered after the suggestion survives a correction.
+await page.locator('#next').click();
+await page.locator('#urgency').fill('3');
+await page.locator('#note').fill('After lunch');
+await page.locator('#back').click();
+await page.locator('[data-type="2"]').click();
+
+const corrected = page.locator('[data-provenance="corrected"]');
+assert.equal(await corrected.count(), 1, 'changing the suggestion clears AI-confirmed state');
+assert.equal(await confirmed.count(), 0);
+assert.equal(await page.locator('[data-provenance="confirmed"]').count(), 0);
+assert.match(await corrected.innerText(), /CORRECTED BY YOU/);
+assert.match(await corrected.innerText(), /AI suggested Type 4/);
+const correctedAria = await corrected.getAttribute('aria-label');
+assert.match(correctedAria, /You changed/i);
+assert.match(correctedAria, /Type 4/);
+assert.match(correctedAria, /Type 2/);
+assert.equal(await page.locator('[data-type="2"]').getAttribute('class').then(v => v.includes('selected')), true);
+assert.equal(await page.locator('[data-type="4"]').getAttribute('class').then(v => v.includes('selected')), false);
+await page.screenshot({ path: 'artifacts/provisional-suggestion-corrected-mobile.png' });
+
+// 4. The correction keeps every user-entered field and reports it honestly on later steps.
+await page.locator('#next').click();
+assert.equal(await page.locator('#color').inputValue(), 'brown', 'the confirmed color is kept, not silently re-suggested');
+assert.equal(await page.locator('#urgency').inputValue(), '3', 'user context is not lost when a suggestion is corrected');
+assert.equal(await page.locator('#note').inputValue(), 'After lunch');
+assert.match(await page.locator('.provenance-note').last().innerText(), /You changed it to Type 2/);
+assert.match(await page.locator('.provenance-note').last().innerText(), /must come from you/i);
+
+// 5. Correcting the second suggested field keeps both corrections in the provenance record.
+await page.locator('#color').selectOption('black');
+await page.locator('#back').click();
+const recolored = page.locator('[data-provenance="corrected"]');
+assert.equal(await recolored.count(), 1);
+assert.match(await recolored.getAttribute('aria-label'), /Type 2, black/);
+
+assert.deepEqual(errors, []);
+await context.close();
+await browser.close();
+console.log('PASS AI suggestions stay provisional, confirmation is explicit, and correcting a suggestion clears AI-confirmed state without losing user context');

tests/release-demo.test.js

@@ -10,6 +10,9 @@ test('release demo visibly explains the CI-protected browser path without overst
 
   assert.match(demo, /Automated checks replay this synthetic path before review/);
   assert.match(demo, /One clear photo action\. Manual logging stays one tap away\./);
+  assert.match(demo, /Camera closed cleanly — gallery and manual logging are still available/);
+  assert.match(demo, /#camera-photo.*dispatchEvent\('cancel'\)/s);
+  assert.match(demo, /#gallery-photo.*synthetic-type4\.jpg/s);
   assert.match(demo, /tests\/fixtures\/synthetic-type4\.jpg/);
   assert.match(demo, /The pinned bootstrap verifies both model files before starting on private loopback/);
   assert.match(demo, /AI may suggest visible form, broad color, and image quality — never symptoms or diagnosis/);
@@ -20,10 +23,223 @@ test('release demo visibly explains the CI-protected browser path without overst
   assert.match(demo, /SLEEK\. SIMPLE\.<br>HERMES-POWERED\./);
 });
 
+test('release demo exercises the vision-offline manual path and the retained draft', async () => {
+  const demo = await readFile(demoPath, 'utf8');
+
+  assert.match(demo, /Vision worker offline — the AI and consent steps disappear instead of failing after upload/);
+  assert.match(demo, /No consent prompt and no upload when analysis cannot run/);
+  assert.match(demo, /One tap still reaches manual Bristol entry/);
+  assert.match(demo, /Closing the log keeps the draft in this session instead of throwing it away/);
+  assert.match(demo, /Start over clears the kept draft — nothing lingers silently/);
+  assert.match(demo, /#manual-from-scan/);
+  assert.match(demo, /#discard-draft/);
+  assert.match(demo, /\.draft-resume/);
+  // The offline pass must be a real state change driven by the app's own readiness contract.
+  assert.match(demo, /providerReady: false|visionOffline/);
+});
+
+test('release demo shows the provisional, confirmed, and corrected suggestion states on camera', async () => {
+  const demo = await readFile(demoPath, 'utf8');
+
+  assert.match(demo, /\[data-provenance="pending"\]/);
+  assert.match(demo, /The suggestion stays provisional — nothing is applied or saved until you confirm it/);
+  assert.match(demo, /Confirming is explicit, and every suggested value is still yours to overrule/);
+  assert.match(demo, /Change a suggested value and Timmy clears the AI-confirmed state/);
+  assert.match(demo, /\[data-provenance="corrected"\]/);
+  assert.match(demo, /Only visible form and color were ever suggested — urgency, discomfort, and symptoms stay yours/);
+  assert.match(demo, /Type 2/, 'the retained draft in the demo must show the value the user corrected to');
+});
+
+test('release demo shows the explainable pattern summary and follows a citation to its own records', async () => {
+  const demo = await readFile(demoPath, 'utf8');
+  const builder = await readFile(builderPath, 'utf8');
+
+  // Issue #34: the recording must exercise the summary, its citation sheet, and the sparse case.
+  assert.match(demo, /\[data-pattern-summary\]/);
+  assert.match(demo, /\[data-statement-link="typical"\]/);
+  assert.match(demo, /\[data-summary-record\]/);
+  assert.match(demo, /\[data-summary-insufficient\]/);
+  assert.match(demo, /The summary says which confirmed logs it read, and a citation opens exactly those records/);
+  assert.match(demo, /Every pattern line names the confirmed logs behind it, and following one shows exactly those records/);
+  assert.match(demo, /Fictional sample logs are seeded into this browser's own storage — no real health data appears here/);
+  assert.match(demo, /Two logs is not a pattern: the summary refuses to describe a trend it cannot support/);
+  // The cited records are asserted in the browser, not narrated.
+  assert.match(demo, /must list exactly the records it cites/);
+  // Both captions are required release gates, so a later release cannot drop the scene silently.
+  assert.match(builder, /Every pattern line names the confirmed logs behind it, and following one shows exactly those records/);
+  assert.match(builder, /Two logs is not a pattern: the summary refuses to describe a trend it cannot support/);
+  assert.match(builder, /"longitudinal_pattern_summary": "passed"/);
+});
+
+test('release demo visibly exercises the red-flag language coverage instead of one canned word', async () => {
+  const demo = await readFile(demoPath, 'utf8');
+  const builder = await readFile(builderPath, 'utf8');
+
+  // Issue #21: the escalation has to fire for real phrasing, on both surfaces the detector serves.
+  assert.match(demo, /const expectEscalation = async \(text, label\)/);
+  assert.match(demo, /expectEscalation\('There is blood when I wipe', 'bleeding reported as wiping'\)/);
+  assert.match(demo, /expectEscalation\('I have tarry stools', 'tarry stool'\)/);
+  assert.match(demo, /note: 'stool was tarry yesterday'/);
+  assert.match(demo, /a tarry note in the journal must escalate the next answer/);
+  // Each scene is asserted in the browser, not narrated: one new bubble, the app's own copy, no provider call.
+  assert.match(demo, /expected exactly one escalation bubble/);
+  assert.match(demo, /the escalation copy must be the app's own fixed string/);
+  assert.match(demo, /an escalated turn must not reach Hermes/);
+  // The new captions are required release gates, so a later release cannot drop the scenes silently.
+  assert.match(builder, /Bleeding reported as wiping still escalates, in the app’s own fixed words/);
+  assert.match(builder, /Tarry and black stool wording escalates too: one red flag, one unchanging message/);
+  assert.match(builder, /A tarry note already saved in the journal escalates the same way, before any provider call/);
+});
+
 test('release builder gates the sleek shell, Hermes chat, and bootstrap syntax', async () => {
   const builder = await readFile(builderPath, 'utf8');
   assert.match(builder, /"test:sleek"/);
+  assert.match(builder, /"test:mobile-capture"/);
+  assert.match(builder, /"test:manual-fallback"/);
+  assert.match(builder, /Manual fallback: vision-offline logging stays one action away with an in-session draft/);
+  assert.match(builder, /"manual_fallback_draft_recovery": "passed"/);
+  assert.match(builder, /"src\/draft\.js"/);
+  assert.match(builder, /"src\/vision-readiness\.js"/);
+  assert.match(builder, /offline vision status/);
   assert.match(builder, /"sleek_hermes_chat_acceptance": "passed"/);
   assert.match(builder, /Sleek three-destination shell/);
   assert.match(builder, /"bash", "-n", "scripts\/bootstrap_selfhost_smolvlm\.sh"/);
 });
+
+test('release builder gates the provisional suggestion states the same way CI does', async () => {
+  const builder = await readFile(builderPath, 'utf8');
+
+  assert.match(builder, /"test:provisional"/);
+  assert.match(builder, /"provisional_suggestion_state": "passed"/);
+  assert.match(builder, /"src\/suggestion\.js"/);
+  assert.match(builder, /AI suggestions stay provisional/);
+});
+
+test('release demo visibly exercises the user-reported hard-stool follow-up and its red-flag handoff', async () => {
+  const demo = await readFile(demoPath, 'utf8');
+
+  assert.match(demo, /\[data-followup-block\]/);
+  assert.match(demo, /Type 2 is hard or lumpy, so Timmy asks about soreness, hydration, blood, and black-or-tarry — never guessed from the photo/);
+  assert.match(demo, /\[data-followup="bloodVisible"\]\[data-answer="no"\]/);
+  assert.match(demo, /Every answer is yours to give, and a skipped question stays unanswered/);
+  assert.match(demo, /#followup-guidance/);
+  assert.match(demo, /Mild report: steady water, no straining, gentle care — general self-care, not a diagnosis/);
+  assert.match(demo, /And it never claims the photo ruled out bleeding/);
+  assert.match(demo, /\[data-followup="tarryBlack"\]\[data-answer="yes"\]/);
+  assert.match(demo, /Say it was truly black and tarry and the same deterministic red-flag path fires instead/);
+  assert.match(demo, /Dark brown is not silently escalated, and the flag clears the moment the answer changes/);
+});
+
+test('release builder gates the hard-stool follow-up the same way CI does', async () => {
+  const builder = await readFile(builderPath, 'utf8');
+
+  assert.match(builder, /"test:followup"/);
+  assert.match(builder, /"hard_stool_followup": "passed"/);
+  assert.match(builder, /"src\/followup\.js"/);
+  assert.match(builder, /Hard-stool follow-up: a Bristol 1-2 entry asks user-reported questions/);
+});
+
+test('release demo states the declared release delta on camera and proves it with a receipt', async () => {
+  const demo = await readFile(demoPath, 'utf8');
+
+  // The delta comes from the builder, so a documentation-only release cannot imply a new feature.
+  assert.match(demo, /TIMMY_RELEASE_DEMO_DELTA/);
+  assert.match(demo, /This release: \$\{releaseDelta\}/);
+  assert.match(demo, /no new feature is claimed/);
+  // A caption alone is not evidence; the demo must emit a machine-readable receipt of what rendered.
+  assert.match(demo, /TIMMY_DEMO_CAPTIONS_OUT/);
+  assert.match(demo, /captionsShown\.push\(text\)/);
+  assert.match(demo, /writeFile\(captionsOut/);
+});
+
+test('release demo shows the byte-bearing controls the threat model governs, without inventing UI', async () => {
+  const demo = await readFile(demoPath, 'utf8');
+
+  assert.match(demo, /\[data-view="privacy"\]/);
+  assert.match(demo, /Every byte-bearing control the model names/);
+  assert.match(demo, /indicate\('#export'\)/);
+  assert.match(demo, /indicate\('#delete-all'\)/);
+  assert.match(demo, /Delete all local data clears the ledger in this browser; there is no server copy of it to keep/);
+  // Real controls only: the selectors must exist in the app shell, not be demo-only scaffolding.
+  const app = await readFile(new URL('../app.js', import.meta.url), 'utf8');
+  assert.match(app, /id="export"/);
+  assert.match(app, /id="delete-all"/);
+});
+
+test('release builder refuses to publish without the on-camera delta receipt', async () => {
+  const builder = await readFile(builderPath, 'utf8');
+
+  assert.match(builder, /TIMMY_RELEASE_DELTA/);
+  assert.match(builder, /TIMMY_DEMO_CAPTIONS_OUT/);
+  assert.match(builder, /Release demo produced no on-camera caption receipt/);
+  assert.match(builder, /Release demo did not state the declared release delta on camera/);
+  assert.match(builder, /Release demo is missing a required on-camera caption/);
+  assert.match(builder, /"release_delta_visible_on_camera": "passed"/);
+  assert.match(builder, /"release_delta": release_delta/);
+});
+
+test('release demo captions expire and the contact sheet spans the whole recording', async () => {
+  const demo = await readFile(demoPath, 'utf8');
+  const builder = await readFile(builderPath, 'utf8');
+
+  // A caption that outlives its stated duration hangs the previous view's claim over the next screen.
+  assert.match(demo, /creates via removal after duration|A caption must not outlive its stated duration/);
+  assert.match(demo, /setTimeout\(\(\) => node\.remove\(\), 220\)/);
+  // The sheet must cover the entire demo, not just its opening.
+  assert.match(builder, /12 \/ demo_duration/);
+  assert.match(builder, /Release demo contact sheet was not produced/);
+});
+
+test('release demo visibly exercises the corpus refusal paths instead of only the happy path', async () => {
+  const demo = await readFile(demoPath, 'utf8');
+  const builder = await readFile(builderPath, 'utf8');
+
+  // The refusal responses must come from the recorded corpus and the real analysis code path,
+  // never from copy pasted into the recording script.
+  assert.match(demo, /loadVisionCorpus/);
+  assert.match(demo, /visionFailureResponse/);
+  assert.match(demo, /corpusAnalyzeResult/);
+  assert.match(demo, /tests\/fixtures\/vision-corpus\/non-stool-scene\.png/);
+  assert.match(demo, /tests\/fixtures\/vision-corpus\/out-of-range-fields\.png/);
+  assert.match(demo, /getByText\(\/No confident match\/i\)/);
+  assert.match(demo, /couldn’t analyze that safely/i);
+
+  assert.match(demo, /A non-stool photo gets a refusal, never a guess/);
+  assert.match(demo, /Unreadable visual fields abstain as well/);
+  assert.match(demo, /An out-of-range answer fails closed/);
+  assert.match(demo, /no real photos in the corpus|no real photos in the recording/);
+  // The refusal copy the user sees is gated on camera, so a release cannot drop it silently.
+  assert.match(builder, /An out-of-range answer fails closed/);
+});
+
+test('release demo shows a filled-in out-of-range field failing closed even beside a blank one', async () => {
+  const demo = await readFile(demoPath, 'utf8');
+  const builder = await readFile(builderPath, 'utf8');
+
+  // Issue #73's escape class, replayed on camera from the committed corpus rather than described.
+  assert.match(demo, /corpusCase\('blank-plus-out-of-range'\)/);
+  assert.match(demo, /tests\/fixtures\/vision-corpus\/blank-plus-out-of-range\.png/);
+  assert.match(demo, /A filled-in field that is out of range still fails closed, even when the other field came back blank/);
+  assert.match(demo, /no longer told the photo was unreadable when the model returned an impossible value/);
+  // The extra fail-closed scene is a real 503, so the demo's error budget must count it.
+  assert.match(demo, /expectedFailClosed\.length !== 2/);
+  // The caption is a required gate, so a later release cannot silently drop the scene.
+  assert.match(builder, /A filled-in field that is out of range still fails closed/);
+});
+
+test('release demo shows readiness waiting for the loaded pinned model before AI is offered', async () => {
+  const demo = await readFile(demoPath, 'utf8');
+  const builder = await readFile(builderPath, 'utf8');
+
+  // Issue #15: reachable is not loaded, and the recording must prove the app withholds AI.
+  assert.match(demo, /modelLoaded = false/);
+  assert.match(demo, /getByText\(\/model is not loaded yet\/i\)/);
+  assert.match(demo, /model-status\.loading/);
+  assert.match(demo, /Reachable is not loaded: no AI control, no consent, and no upload until the pinned model is resident/);
+  assert.match(demo, /No AI control may exist before the model is loaded/);
+  assert.match(demo, /Once the pinned model is loaded, the same screen offers the AI analysis again/);
+  // The scene is asserted in the browser, not narrated: the demo throws if the state is wrong.
+  assert.match(demo, /must never be reported ready/);
+  // The caption is a required release gate, so the scene cannot be dropped silently.
+  assert.match(builder, /Reachable is not loaded: no AI control, no consent, and no upload until the pinned model is resident/);
+});

tests/server-shutdown.acceptance.mjs

@@ -1,93 +0,0 @@
-import test from 'node:test';
-import assert from 'node:assert/strict';
-import { chmod, mkdtemp, rm, readFile } from 'node:fs/promises';
-import { spawn } from 'node:child_process';
-import { tmpdir } from 'node:os';
-import { join } from 'node:path';
-import { constants as fsConstants } from 'node:fs';
-import { fileURLToPath } from 'node:url';
-
-const root = fileURLToPath(new URL('..', import.meta.url));
-const fixture = fileURLToPath(new URL('./fixtures/slow-hermes.mjs', import.meta.url));
-
-test('server shutdown cancels in-flight turns and leaves no orphan Hermes subprocesses', async () => {
-  const workdir = await mkdtemp(join(tmpdir(), 'timmy-shutdown-'));
-  await chmod(fixture, fsConstants.S_IRWXU);
-  const child = spawn(process.execPath, ['server.mjs'], {
-    cwd: root,
-    env: {
-      ...process.env,
-      HOST: '127.0.0.1',
-      PORT: '4188',
-      TIMMY_AGENT_ENABLED: 'true',
-      TIMMY_AGENT_ACCESS_TOKEN: 'shutdown-accept-code-2026',
-      TIMMY_PUBLIC_ORIGIN: 'http://127.0.0.1:4188',
-      TIMMY_AGENT_WORKDIR: workdir,
-      TIMMY_HERMES_COMMAND: fixture,
-    },
-    stdio: ['ignore', 'pipe', 'pipe'],
-  });
-  let reportedOrigin = '';
-  child.stdout.on('data', chunk => {
-    const match = String(chunk).match(/listening on http:\/\/([^:]+):(\d+)/);
-    if (match && !reportedOrigin) reportedOrigin = `http://${match[1]}:${match[2]}`;
-  });
-  const deadline = Date.now() + 10_000;
-  while (!reportedOrigin && Date.now() < deadline && child.exitCode === null) {
-    await new Promise(resolve => setTimeout(resolve, 50));
-  }
-  assert.ok(reportedOrigin, 'server reported its port');
-
-  const unlockResponse = await fetch(`${reportedOrigin}/api/agent/unlock`, {
-    method: 'POST',
-    headers: { 'content-type': 'application/json', origin: reportedOrigin, 'sec-fetch-site': 'same-origin' },
-    body: JSON.stringify({ accessCode: 'shutdown-accept-code-2026' }),
-  });
-  assert.equal(unlockResponse.status, 200);
-  const browserCookie = unlockResponse.headers.get('set-cookie').split(';', 1)[0];
-
-  // Start a turn wedged on the fixture's HOLD gate.
-  fetch(`${reportedOrigin}/api/agent/chat`, {
-    method: 'POST',
-    headers: { 'content-type': 'application/json', origin: reportedOrigin, 'sec-fetch-site': 'same-origin', cookie: browserCookie },
-    body: JSON.stringify({ message: 'HOLD shutdown probe', ledger: [] }),
-  }).catch(() => {});
-  await new Promise(resolve => setTimeout(resolve, 600));
-
-  const pidLog = join(workdir, 'fixture-pids.log');
-  // Wait until the fixture for this run's HOLD turn is actually alive.
-  let lastPid = null;
-  const spawnDeadline = Date.now() + 8_000;
-  while (Date.now() < spawnDeadline) {
-    const recorded = ((await readFile(pidLog, 'utf8').catch(() => '')) || '')
-      .split('\n').map(Number).filter(Boolean);
-    const candidate = recorded.at(-1);
-    if (candidate) {
-      let alive = true;
-      try { process.kill(candidate, 0); } catch { alive = false; }
-      if (alive) {
-        lastPid = candidate;
-        break;
-      }
-    }
-    await new Promise(resolve => setTimeout(resolve, 100));
-  }
-  assert.ok(lastPid, 'fixture subprocess was spawned for the in-flight turn');
-  let aliveBefore = true;
-  try { process.kill(lastPid, 0); } catch { aliveBefore = false; }
-  assert.ok(aliveBefore, `fixture ${lastPid} is running before shutdown`);
-
-  // Shut the server down while the turn is still running.
-  child.kill('SIGTERM');
-  await new Promise((resolve, reject) => {
-    const timeout = setTimeout(() => reject(new Error('server did not exit after SIGTERM')), 5_000);
-    child.on('exit', code => { clearTimeout(timeout); resolve(code); });
-  });
-
-  // The in-flight fixture must be gone — no orphan subprocess may survive.
-  await new Promise(resolve => setTimeout(resolve, 500));
-  let aliveAfter = true;
-  try { process.kill(lastPid, 0); } catch { aliveAfter = false; }
-  assert.equal(aliveAfter, false, `fixture process ${lastPid} survived server shutdown`);
-  await rm(workdir, { recursive: true, force: true }).catch(() => {});
-}, { timeout: 30_000 });

tests/service-worker-runtime.test.js

@@ -95,3 +95,38 @@ test('no-store shell responses are returned without being cached', async () => {
 
   assert.deepEqual(puts, []);
 });
+
+function headerReader(values) {
+  return name => values[String(name).toLowerCase()] ?? null;
+}
+
+test('image bodies are never written into the shell cache', async () => {
+  const request = { method: 'GET', url: 'https://example.test/timmy-staging/history/entry-photo.jpg' };
+  const imageResponse = { headers: { get: headerReader({ 'content-type': 'image/jpeg' }) }, clone: () => ({}) };
+  const { listeners, puts, getCacheOpenCount } = loadWorker({
+    scope: 'https://example.test/timmy-staging/',
+    fetchImpl: async () => imageResponse,
+  });
+
+  const response = await dispatchFetch(listeners.get('fetch'), request);
+  await response;
+  await Promise.resolve();
+  await Promise.resolve();
+
+  assert.equal(await response, imageResponse);
+  assert.deepEqual(puts, []);
+  assert.equal(getCacheOpenCount(), 0);
+});
+
+test('ordinary shell assets are still cached so offline logging keeps working', async () => {
+  const request = { method: 'GET', url: 'https://example.test/app.js' };
+  const assetResponse = { headers: { get: headerReader({ 'content-type': 'text/javascript' }) }, clone: () => ({}) };
+  const { listeners, puts } = loadWorker({ fetchImpl: async () => assetResponse });
+
+  const response = await dispatchFetch(listeners.get('fetch'), request);
+  await response;
+  await Promise.resolve();
+  await Promise.resolve();
+
+  assert.deepEqual(puts, [request.url]);
+});

tests/sleek-chat.acceptance.mjs

@@ -14,7 +14,7 @@ page.on('console', message => { if (message.type() === 'error') errors.push(mess
 page.on('pageerror', error => errors.push(error.message));
 page.on('request', request => { if (new URL(request.url()).pathname.includes('/api/')) apiRequests.push(new URL(request.url()).pathname); });
 
-await page.route('**/api/vision-status', route => route.fulfill({ status: 200, contentType: 'application/json', body: JSON.stringify({ enabled: true, profile: 'selfhost', providerReady: true, model: 'SmolVLM2-2.2B-Instruct' }) }));
+await page.route('**/api/vision-status', route => route.fulfill({ status: 200, contentType: 'application/json', body: JSON.stringify({ enabled: true, profile: 'selfhost', providerReady: true, modelSeen: true, model: 'SmolVLM2-2.2B-Instruct' }) }));
 await page.route('**/api/agent/status', route => route.fulfill({ status: 200, contentType: 'application/json', body: JSON.stringify({ enabled: true, configured: true, authenticated: true, mode: 'hermes-agent' }) }));
 let chatRequest;
 await page.route('**/api/agent/chat', async route => {

tests/suggestion.test.js

@@ -0,0 +1,92 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+
+import { changeVisualField, confirmSuggestion, createSuggestionState, provenanceCopy } from '../src/suggestion.js';
+
+test('keeps an AI suggestion provisional until the user acts on it', () => {
+  const state = createSuggestionState({ status: 'suggestion', bristolType: 4, color: 'brown', confidence: 0.83 });
+
+  assert.equal(state.status, 'pending');
+  assert.equal(state.affirmed, false);
+  assert.deepEqual(state.suggestion, { bristolType: 4, color: 'brown', confidence: 0.83 });
+});
+
+test('treats a missing or unusable suggestion as no suggestion at all', () => {
+  assert.deepEqual(createSuggestionState(null).status, 'none');
+  assert.deepEqual(createSuggestionState(undefined).suggestion, null);
+  assert.deepEqual(createSuggestionState({ status: 'needs_user_input', reason: 'The image is too uncertain to prefill safely.' }).status, 'none');
+});
+
+test('confirms a suggestion only when the user explicitly accepts it', () => {
+  const pending = createSuggestionState({ status: 'suggestion', bristolType: 4, color: 'brown', confidence: 0.83 });
+  const confirmed = confirmSuggestion(pending);
+
+  assert.equal(confirmed.status, 'confirmed');
+  assert.equal(confirmed.affirmed, true);
+  assert.deepEqual(confirmed.suggestion, pending.suggestion);
+
+  const nothing = confirmSuggestion(createSuggestionState(null));
+  assert.equal(nothing.status, 'none');
+  assert.equal(nothing.affirmed, false);
+  assert.equal(confirmSuggestion(confirmed).status, 'confirmed');
+});
+
+test('changing a suggested field clears AI-confirmed state but keeps the context', () => {
+  const confirmed = confirmSuggestion(createSuggestionState({ status: 'suggestion', bristolType: 4, color: 'brown', confidence: 0.83 }));
+  const corrected = changeVisualField(confirmed, 'bristolType', 2);
+
+  assert.equal(corrected.status, 'corrected');
+  assert.equal(corrected.affirmed, false);
+  assert.deepEqual(corrected.suggestion, { bristolType: 4, color: 'brown', confidence: 0.83 });
+  assert.deepEqual(corrected.correctedFields, ['bristolType']);
+
+  const recorrected = changeVisualField(corrected, 'color', 'black');
+  assert.deepEqual(recorrected.correctedFields, ['bristolType', 'color']);
+  assert.deepEqual(changeVisualField(recorrected, 'note', 'ignored').correctedFields, ['bristolType', 'color']);
+});
+
+test('does not invent an AI correction when the user never had a suggestion', () => {
+  const manual = changeVisualField(createSuggestionState(null), 'bristolType', 6);
+
+  assert.equal(manual.status, 'manual');
+  assert.equal(manual.suggestion, null);
+  assert.deepEqual(manual.correctedFields, []);
+});
+
+test('re-picking the suggested value is not treated as a correction', () => {
+  const confirmed = confirmSuggestion(createSuggestionState({ status: 'suggestion', bristolType: 4, color: 'brown', confidence: 0.83 }));
+
+  assert.equal(changeVisualField(confirmed, 'bristolType', 4).status, 'confirmed');
+  assert.deepEqual(changeVisualField(confirmed, 'bristolType', 4).correctedFields, []);
+});
+
+test('labels suggested, confirmed, corrected, and manual states distinctly', () => {
+  const pending = createSuggestionState({ status: 'suggestion', bristolType: 4, color: 'brown', confidence: 0.83 });
+  const confirmed = confirmSuggestion(pending);
+  const corrected = changeVisualField(confirmed, 'bristolType', 2);
+  const manual = changeVisualField(createSuggestionState(null), 'bristolType', 6);
+
+  const labels = [pending, confirmed, corrected, manual].map(state => provenanceCopy(state, { bristolType: 2, color: 'brown' }).label);
+
+  assert.deepEqual(labels, ['AI SUGGESTION', 'AI PREFILLED', 'CORRECTED BY YOU', 'YOUR OWN ENTRY']);
+  assert.equal(provenanceCopy(createSuggestionState(null), {}).label, '');
+});
+
+test('screen-reader copy carries the AI confidence and who is in control', () => {
+  const pending = createSuggestionState({ status: 'suggestion', bristolType: 4, color: 'brown', confidence: 0.83 });
+  const confirmed = confirmSuggestion(pending);
+  const corrected = changeVisualField(confirmed, 'bristolType', 2);
+  const manual = changeVisualField(createSuggestionState(null), 'bristolType', 6);
+
+  assert.match(provenanceCopy(pending, { bristolType: 4, color: 'brown' }).aria, /83 percent confidence/i);
+  assert.match(provenanceCopy(pending, { bristolType: 4, color: 'brown' }).aria, /not saved until you confirm/i);
+  assert.match(provenanceCopy(confirmed, { bristolType: 4, color: 'brown' }).aria, /83 percent confidence/i);
+  assert.match(provenanceCopy(confirmed, { bristolType: 4, color: 'brown' }).aria, /You confirmed/i);
+
+  const correctedAria = provenanceCopy(corrected, { bristolType: 2, color: 'brown' }).aria;
+  assert.match(correctedAria, /You changed/i);
+  assert.match(correctedAria, /Type 4/);
+  assert.match(correctedAria, /Type 2/);
+  assert.equal(corrected.affirmed, false);
+  assert.match(provenanceCopy(manual, { bristolType: 6, color: 'brown' }).aria, /No AI suggestion/i);
+});

tests/summary.test.js

@@ -0,0 +1,100 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+
+import { buildPatternSummary } from '../src/summary.js';
+
+const DAY = 86400000;
+const NOW = Date.parse('2026-09-20T12:00:00.000Z');
+const entry = (id, daysAgo, bristolType) => ({
+  id,
+  occurredAt: new Date(NOW - daysAgo * DAY).toISOString(),
+  bristolType,
+  color: 'brown',
+  urgency: 0,
+  discomfort: 0,
+  note: '',
+  symptoms: {},
+});
+
+test('every summary statement cites the confirmed records it was built from', () => {
+  const summary = buildPatternSummary([entry('a', 1, 4), entry('b', 3, 3), entry('c', 5, 6)], { now: NOW });
+
+  assert.equal(summary.insufficient, false);
+  assert.equal(summary.window.label, 'last 28 days');
+
+  const frequency = summary.statements.find(statement => statement.id === 'frequency');
+  assert.ok(frequency, 'the window needs a frequency line');
+  assert.match(frequency.text, /3 confirmed logs/);
+  assert.match(frequency.text, /last 28 days/);
+  assert.deepEqual(frequency.entryIds, ['c', 'b', 'a']);
+
+  // No statement may cite an id the summary cannot point at a real record for.
+  const known = new Set(summary.records.map(record => record.id));
+  for (const statement of summary.statements) {
+    assert.ok(statement.entryIds.length > 0, `${statement.id} must cite its contributing records`);
+    for (const id of statement.entryIds) assert.ok(known.has(id), `${statement.id} cited an unknown record ${id}`);
+  }
+});
+
+test('each form line cites only the records in that form bucket', () => {
+  const summary = buildPatternSummary([entry('a', 1, 2), entry('b', 3, 4), entry('c', 5, 4), entry('d', 6, 4)], { now: NOW });
+
+  const firm = summary.statements.find(statement => statement.id === 'firm');
+  assert.ok(firm, 'a firm-side line is needed when firm logs exist');
+  assert.match(firm.text, /Type 1–2/);
+  assert.match(firm.text, /1 of 4/);
+  assert.deepEqual(firm.entryIds, ['a']);
+
+  const typical = summary.statements.find(statement => statement.id === 'typical');
+  assert.match(typical.text, /3 of 4/);
+  assert.deepEqual(typical.entryIds, ['d', 'c', 'b']);
+  assert.equal(summary.statements.some(statement => statement.id === 'loose'), false);
+});
+
+test('a contradictory window is reported as a mixed pattern instead of one trend', () => {
+  const summary = buildPatternSummary([entry('a', 1, 1), entry('b', 2, 1), entry('c', 3, 6), entry('d', 4, 7)], { now: NOW });
+
+  const mixed = summary.statements.find(statement => statement.id === 'mixed');
+  assert.ok(mixed, 'a window with both firm and loose logs needs an explicit mixed line');
+  assert.match(mixed.text, /firm and loose logs both appear/i);
+  assert.match(mixed.text, /not one trend/i);
+  assert.deepEqual(mixed.entryIds, ['d', 'c', 'b', 'a']);
+});
+
+test('logs outside the window are neither counted nor cited', () => {
+  const summary = buildPatternSummary([entry('old', 40, 1), entry('a', 1, 4), entry('b', 3, 3), entry('c', 5, 4)], { now: NOW });
+
+  assert.deepEqual(summary.records.map(record => record.id), ['c', 'b', 'a']);
+  assert.equal(summary.statements.some(statement => statement.entryIds.includes('old')), false);
+  assert.match(summary.statements.find(statement => statement.id === 'frequency').text, /3 confirmed logs/);
+
+  const weekly = buildPatternSummary([entry('old', 40, 1), entry('a', 1, 4), entry('b', 2, 4), entry('c', 3, 4)], { now: NOW, windowDays: 7 });
+  assert.equal(weekly.window.label, 'last 7 days');
+  assert.equal(weekly.window.days, 7);
+  assert.deepEqual(weekly.records.map(record => record.id), ['c', 'b', 'a']);
+});
+
+test('the summary states its boundary and never explains a cause or clears a food', () => {
+  const summary = buildPatternSummary([entry('a', 1, 4), entry('b', 3, 3), entry('c', 5, 6)], { now: NOW });
+  assert.match(summary.boundary, /your own confirmed records/i);
+
+  const forbidden = /because|due to|caused|triggered|safe to eat|avoid eating|should eat|clears|diagnos|treat/i;
+  for (const text of [summary.boundary, summary.copy, ...summary.statements.map(statement => statement.text)]) {
+    assert.doesNotMatch(text, forbidden, text);
+  }
+  const sparse = buildPatternSummary([entry('a', 1, 4)], { now: NOW });
+  for (const text of [sparse.boundary, sparse.copy]) {
+    assert.doesNotMatch(text, forbidden, text);
+  }
+});
+
+test('refuses to describe a pattern from too few confirmed logs', () => {
+  const summary = buildPatternSummary([entry('a', 1, 4), entry('b', 3, 3)], { now: NOW });
+
+  assert.equal(summary.insufficient, true);
+  assert.deepEqual(summary.statements, []);
+  assert.match(summary.copy, /not enough confirmed logs/i);
+  assert.match(summary.copy, /2 of 3/);
+  // The summary still lists exactly what it did read, in the order it happened.
+  assert.deepEqual(summary.records.map(record => record.id), ['b', 'a']);
+});

tests/threat-model.test.js

@@ -0,0 +1,119 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { readFile } from 'node:fs/promises';
+
+const threatModelPath = new URL('../docs/PHOTO-DATAFLOW-THREAT-MODEL.md', import.meta.url);
+const productDecisionPath = new URL('../docs/PRODUCT-DECISIONS.md', import.meta.url);
+const roadmapPath = new URL('../ROADMAP.md', import.meta.url);
+
+// Every hop that can hold, move, or leak a user's photo bytes has to be named
+// in the diagram, not only in prose.
+const REQUIRED_DIAGRAM_NODES = [
+  ['browser', /\bbrowser\b/i],
+  ['API ingress', /\bapi[- ]ingress\b/i],
+  ['model worker', /\bmodel worker\b/i],
+  ['transient buffers', /\btransient buffer/i],
+  ['training opt-in store', /\btraining opt-in\b/i],
+  ['logs', /\blogs?\b/i],
+  ['exports', /\bexports?\b/i],
+  ['deletion', /\bdeletion\b/i],
+];
+
+// The abuse cases the ticket names explicitly, in the order they appear there.
+const REQUIRED_THREATS = [
+  ['replay', /\breplay\b/i],
+  ['oversized input', /\boversized input\b/i],
+  ['metadata leakage', /\bmetadata leakage\b/i],
+  ['poisoning', /\bpoisoning\b/i],
+  ['unauthorized training', /\bunauthorized training\b/i],
+  ['operator access', /\boperator access\b/i],
+];
+
+function diagramBody(doc) {
+  const match = doc.match(/```mermaid\r?\n([\s\S]*?)```/);
+  assert.ok(match, 'the threat model must contain a fenced mermaid data-flow diagram');
+  return match[1];
+}
+
+function threatBlocks(doc) {
+  const blocks = new Map();
+  const pattern = /^###\s+(T\d+)\s+—\s+(.+)$/gm;
+  const headings = [...doc.matchAll(pattern)];
+  headings.forEach((heading, index) => {
+    const start = heading.index + heading[0].length;
+    const end = index + 1 < headings.length ? headings[index + 1].index : doc.length;
+    blocks.set(heading[1], { name: heading[2].trim(), body: doc.slice(start, end) });
+  });
+  return blocks;
+}
+
+function knownIssueNumbers(roadmap) {
+  return new Set([...roadmap.matchAll(/issues\/(\d+)/g)].map((match) => Number(match[1])));
+}
+
+test('photo data-flow threat model diagrams every component that can hold or leak image bytes', async () => {
+  const doc = await readFile(threatModelPath, 'utf8');
+  const diagram = diagramBody(doc);
+
+  for (const [label, pattern] of REQUIRED_DIAGRAM_NODES) {
+    assert.match(diagram, pattern, `the data-flow diagram must show the ${label} component`);
+  }
+
+  // The diagram has to end somewhere: the model worker's bytes must not flow on.
+  assert.match(diagram, /no retention|dropped|discarded|never persist/i,
+    'the diagram must show that worker input is not retained');
+});
+
+test('every required abuse case has a mitigation, an owner, and a real follow-up ticket', async () => {
+  const [doc, roadmap] = await Promise.all([
+    readFile(threatModelPath, 'utf8'),
+    readFile(roadmapPath, 'utf8'),
+  ]);
+  const known = knownIssueNumbers(roadmap);
+  const blocks = threatBlocks(doc);
+
+  assert.ok(blocks.size > 0, 'threats must be numbered headings so their coverage is checkable');
+  const named = [...blocks.values()].map((block) => block.name).join('\n');
+
+  for (const [label, pattern] of REQUIRED_THREATS) {
+    assert.match(named, pattern, `the ${label} abuse case must be its own numbered threat`);
+
+    const block = [...blocks.values()].find((entry) => pattern.test(entry.name));
+    assert.match(block.body, /^\s*-\s*\*\*Owner:\*\*\s*\S+/m,
+      `${label} needs a named owner`);
+    assert.match(block.body, /^\s*-\s*\*\*Testable follow-up:\*\*\s*#\d+/m,
+      `${label} needs a testable follow-up ticket`);
+    assert.match(block.body, /^\s*-\s*\*\*Mitigation:\*\*\s*\S+/m,
+      `${label} needs a concrete mitigation, not a restatement of the risk`);
+    assert.match(block.body, /^\s*-\s*\*\*Evidence:\*\*\s*\S+/m,
+      `${label} needs the artifact that will prove the mitigation works`);
+
+    const followUp = Number(block.body.match(/^\s*-\s*\*\*Testable follow-up:\*\*\s*#(\d+)/m)[1]);
+    assert.ok(known.has(followUp),
+      `${label} points at #${followUp}, which is not a tracked ticket in ROADMAP.md`);
+    assert.notEqual(followUp, 20, `${label} must delegate to work other than this threat model itself`);
+  }
+});
+
+test('threat model keeps the photo path non-diagnostic and free of real medical images', async () => {
+  const doc = await readFile(threatModelPath, 'utf8');
+
+  assert.match(doc, /non-diagnostic/i);
+  assert.match(doc, /never diagnos/i);
+  assert.match(doc, /provisional/i);
+  assert.match(doc, /synthetic/i, 'fixtures must be synthetic, not real medical images');
+  assert.match(doc, /no real (?:medical |stool )?images? (?:are |may )?(?:ever )?(?:added|used|shipped|included)/i,
+    'the model must state plainly that no real medical images enter the repo');
+  assert.match(doc, /deterministic (?:red-flag )?(?:escalation|urgent-symptom)/i,
+    'the model must note that escalation is deterministic and never model-gated');
+  assert.doesNotMatch(doc, /\b(?:bathroom photo|patient photo|clinical image|real stool image)\b/i,
+    'the model must not promise or reference real medical imagery');
+  assert.doesNotMatch(doc, /\b(?:clinically validated|clinically proven|medical device|FDA-cleared|CE-marked)\b/i,
+    'the model must not overstate the clinical status of the vision path');
+});
+
+test('the accepted product decision record links the photo data-flow threat model', async () => {
+  const decision = await readFile(productDecisionPath, 'utf8');
+  assert.match(decision, /\.\/PHOTO-DATAFLOW-THREAT-MODEL\.md/,
+    'the governing decision record must point reviewers at the threat model');
+});

tests/vision-boundary.test.js

@@ -0,0 +1,110 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { analyzePhoto, visionFailureResponse } from '../src/vision-service.js';
+import { loadVisionCorpus } from '../src/vision-corpus.js';
+import { CORPUS_MODEL, caseFor, corpusDir, corpusPayload, startProvider, startServer, stopServer } from './helpers/vision-harness.mjs';
+
+const FAIL_CLOSED_COPY = /no suggestion was applied/i;
+
+test('a malformed provider response fails closed with user-safe copy instead of echoing provider detail', () => {
+  const failure = visionFailureResponse(Object.assign(new Error('Invalid AI response: visual fields are out of range.'), { code: 'invalid_fields' }));
+
+  assert.equal(failure.status, 503);
+  assert.match(failure.body.error, FAIL_CLOSED_COPY);
+  assert.doesNotMatch(failure.body.error, /invalid ai response|out of range/i);
+
+  const consent = visionFailureResponse(new Error('Explicit consent is required before AI analysis.'));
+  assert.equal(consent.status, 400);
+  assert.match(consent.body.error, /consent/i);
+
+  const offline = visionFailureResponse(new Error('AI analysis is temporarily unavailable. Continue manually.'));
+  assert.equal(offline.status, 503);
+  assert.match(offline.body.error, /temporarily unavailable/i);
+});
+
+test('the corpus replays through the real provider call path without inventing a suggestion', async () => {
+  const corpus = await loadVisionCorpus(corpusDir);
+  for (const entry of corpus.cases) {
+    const fetchImpl = async () => ({ ok: true, json: async () => ({ choices: [{ message: { content: entry.providerContent } }] }) });
+    const options = {
+      payload: { imageDataUrl: 'data:image/png;base64,YQ==', consent: true },
+      fetchImpl,
+      config: { baseUrl: 'http://127.0.0.1:9/v1', apiKey: 'corpus-key', model: CORPUS_MODEL },
+    };
+    if (entry.expectedOutcome === 'suggestion') {
+      const result = await analyzePhoto(options);
+      assert.equal(result.status, 'suggestion', `${entry.id} must return a suggestion`);
+      assert.equal(result.imageQuality, 'good');
+    } else if (entry.expectedOutcome === 'abstained') {
+      const result = await analyzePhoto(options);
+      assert.equal(result.status, 'needs_user_input', `${entry.id} must abstain`);
+      assert.equal(result.abstainedFor, entry.expectedReason, `${entry.id} must name its abstention`);
+      assert.equal('bristolType' in result, false, `${entry.id} must not prefill a form`);
+    } else {
+      await assert.rejects(() => analyzePhoto(options), (error) => {
+        assert.equal(visionFailureResponse(error).status, 503, `${entry.id} must fail closed`);
+        return true;
+      });
+    }
+  }
+});
+
+test('the running server answers every corpus case with a fail-closed status and no leaked image bytes', async () => {
+  const corpus = await loadVisionCorpus(corpusDir);
+  const provider = await startProvider();
+  const server = await startServer({ providerPort: provider.port });
+  const postAnalyze = async (payload) => {
+    const response = await fetch('http://127.0.0.1:4199/api/analyze', {
+      method: 'POST',
+      headers: { 'content-type': 'application/json' },
+      body: JSON.stringify(payload),
+    });
+    return { status: response.status, body: await response.json() };
+  };
+  try {
+    const suggestion = caseFor(corpus, 'stool-like-formed');
+    provider.state.content = suggestion.providerContent;
+    const payload = await corpusPayload(suggestion);
+    const ok = await postAnalyze(payload);
+    assert.equal(ok.status, 200, 'a schema-valid suggestion is the only case that returns 200 with fields');
+    assert.equal(ok.body.bristolType, 4);
+
+    const glare = caseFor(corpus, 'glare-overexposed');
+    provider.state.content = glare.providerContent;
+    const abstained = await postAnalyze(await corpusPayload(glare));
+    assert.equal(abstained.status, 200, 'a schema-valid response with unreadable fields abstains, it is not a server failure');
+    assert.equal(abstained.body.status, 'needs_user_input');
+    assert.equal(abstained.body.abstainedFor, 'unusable_visual_fields');
+    assert.equal('bristolType' in abstained.body, false);
+
+    const malformed = caseFor(corpus, 'malformed-response');
+    provider.state.content = malformed.providerContent;
+    const unparsable = await postAnalyze(await corpusPayload(malformed));
+    assert.equal(unparsable.status, 503, 'unparsable provider content must not be served as a suggestion');
+    assert.match(unparsable.body.error, FAIL_CLOSED_COPY);
+    assert.doesNotMatch(JSON.stringify(unparsable.body), /base64|data:image|corpus-key|Bearer/i);
+
+    const outOfRangeCase = caseFor(corpus, 'out-of-range-fields');
+    provider.state.content = outOfRangeCase.providerContent;
+    const outOfRange = await postAnalyze(await corpusPayload(outOfRangeCase));
+    assert.equal(outOfRange.status, 503, 'out-of-range fields must not be served as a suggestion');
+    assert.match(outOfRange.body.error, FAIL_CLOSED_COPY);
+
+    // Issue #73: a filled-in field that is out of range fails closed even when the other field is blank,
+    // so the user is never told the photo was unreadable when the model returned an impossible value.
+    const blankAndOutOfRange = caseFor(corpus, 'blank-plus-out-of-range');
+    provider.state.content = blankAndOutOfRange.providerContent;
+    const blankOutOfRange = await postAnalyze(await corpusPayload(blankAndOutOfRange));
+    assert.equal(blankOutOfRange.status, 503, 'a filled-in out-of-range field must not be served as an abstention');
+    assert.match(blankOutOfRange.body.error, FAIL_CLOSED_COPY);
+    assert.equal('abstainedFor' in blankOutOfRange.body, false, 'a contract breach must not be reported as an abstention');
+    assert.doesNotMatch(JSON.stringify(blankOutOfRange.body), /base64|data:image|corpus-key|Bearer/i);
+
+    const noConsent = await postAnalyze({ imageDataUrl: payload.imageDataUrl, consent: false });
+    assert.equal(noConsent.status, 400, 'analysis without explicit consent is a client error');
+    assert.doesNotMatch(JSON.stringify(noConsent.body), /base64|data:image/i);
+  } finally {
+    await stopServer(server);
+    await provider.close();
+  }
+});

tests/vision-corpus.test.js

@@ -0,0 +1,110 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { cp, mkdtemp, readFile, rm, writeFile } from 'node:fs/promises';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { classifyVisionOutcome, loadVisionCorpus, VISION_CORPUS_CLASSES, VISION_CORPUS_LICENSE, VISION_CORPUS_OUTCOMES } from '../src/vision-corpus.js';
+
+const corpusDir = fileURLToPath(new URL('./fixtures/vision-corpus/', import.meta.url));
+// The colour contract `src/analysis.js` enforces, restated here so the corpus can be checked against it.
+const COLORS_IN_CONTRACT = ['brown', 'green', 'yellow', 'pale', 'red', 'black'];
+
+async function scratchCorpus() {
+  const directory = await mkdtemp(join(tmpdir(), 'timmy-corpus-'));
+  await cp(corpusDir, directory, { recursive: true });
+  return directory;
+}
+
+test('vision corpus ships licensed synthetic fixtures covering every required visual case class', async () => {
+  const corpus = await loadVisionCorpus(corpusDir);
+
+  assert.equal(corpus.license, VISION_CORPUS_LICENSE);
+  const classes = new Set(corpus.cases.map(entry => entry.caseClass));
+  for (const required of VISION_CORPUS_CLASSES) {
+    assert.ok(classes.has(required), `corpus must cover the ${required} case`);
+  }
+  for (const entry of corpus.cases) {
+    assert.equal(entry.synthetic, true, `${entry.id} must be synthetic; no real medical image is redistributable`);
+    assert.equal(entry.license, VISION_CORPUS_LICENSE);
+    assert.match(entry.provenance, /\S/, `${entry.id} must record where it came from`);
+    assert.match(entry.sha256, /^[a-f0-9]{64}$/, `${entry.id} must record its content hash`);
+  }
+});
+
+test('vision corpus rejects fixtures whose bytes no longer match the recorded hash', async () => {
+  const directory = await scratchCorpus();
+  try {
+    const manifest = JSON.parse(await readFile(join(directory, 'manifest.json'), 'utf8'));
+    const target = join(directory, manifest.cases[0].file);
+    const bytes = await readFile(target);
+    await writeFile(target, Buffer.concat([bytes, Buffer.from([0])]));
+
+    await assert.rejects(() => loadVisionCorpus(directory), new RegExp(manifest.cases[0].id));
+  } finally {
+    await rm(directory, { recursive: true, force: true });
+  }
+});
+
+test('vision corpus rejects an unlicensed, non-synthetic, or incomplete manifest', async () => {
+  const directory = await scratchCorpus();
+  try {
+    const manifestPath = join(directory, 'manifest.json');
+    const manifest = JSON.parse(await readFile(manifestPath, 'utf8'));
+
+    manifest.cases[0].synthetic = false;
+    await writeFile(manifestPath, JSON.stringify(manifest, null, 2));
+    await assert.rejects(() => loadVisionCorpus(directory), /synthetic/i);
+
+    manifest.cases[0].synthetic = true;
+    manifest.cases = manifest.cases.filter(entry => entry.caseClass !== 'non-stool');
+    await writeFile(manifestPath, JSON.stringify(manifest, null, 2));
+    await assert.rejects(() => loadVisionCorpus(directory), /non-stool/);
+
+    manifest.cases[0].license = 'all-rights-reserved';
+    await writeFile(manifestPath, JSON.stringify(manifest, null, 2));
+    await assert.rejects(() => loadVisionCorpus(directory), /CC0-1\.0/);
+  } finally {
+    await rm(directory, { recursive: true, force: true });
+  }
+});
+
+test('the corpus earns its out-of-range label and covers the blank-plus-out-of-range class', async () => {
+  const corpus = await loadVisionCorpus(corpusDir);
+  const outOfRange = corpus.cases.filter(entry => entry.expectedReason === 'out_of_range_or_missing_fields');
+  assert.ok(outOfRange.length > 0, 'the corpus must cover the out-of-range failure class');
+
+  // Issue #73: a case whose confidence breaks the gate never reaches the field-range check, so its
+  // `out_of_range_or_missing_fields` label would be attributed to a guard it never exercised.
+  const reachesRangeCheck = outOfRange.filter(entry => Number(JSON.parse(entry.providerContent).confidence) <= 1);
+  assert.ok(reachesRangeCheck.length > 0, 'at least one out-of-range case must clear the confidence gate to exercise the range check');
+
+  // Issue #73's escape class: a blank field next to a non-blank, out-of-range field. This is the exact
+  // reply shape that used to abstain as `unusable_visual_fields` instead of failing closed.
+  const blank = value => value === null || value === undefined || (typeof value === 'string' && !value.trim());
+  const colourInContract = value => COLORS_IN_CONTRACT.includes(String(value).toLowerCase());
+  const formInContract = value => Number.isInteger(Number(value)) && Number(value) >= 1 && Number(value) <= 7;
+  const escapeCases = outOfRange.filter(entry => {
+    const value = JSON.parse(entry.providerContent);
+    const fields = [value.bristolType, value.color];
+    return fields.some(blank) && fields.some(field => !blank(field) && !(colourInContract(field) || formInContract(field)));
+  });
+  assert.ok(escapeCases.length > 0, 'the corpus must carry a blank-plus-out-of-range case so the fail-closed label is really earned');
+});
+
+test('every recorded corpus response is schema-valid or fails closed, exactly as declared', async () => {
+  const corpus = await loadVisionCorpus(corpusDir);
+
+  for (const entry of corpus.cases) {
+    const result = classifyVisionOutcome(entry.providerContent);
+    assert.ok(VISION_CORPUS_OUTCOMES.includes(result.outcome), `${entry.id} produced an unknown outcome ${result.outcome}`);
+    assert.equal(result.outcome, entry.expectedOutcome, `${entry.id} must resolve to ${entry.expectedOutcome}`);
+    assert.equal(result.reason, entry.expectedReason, `${entry.id} must report ${entry.expectedReason}`);
+    // A response may never smuggle a visual claim out of a non-suggestion outcome.
+    if (result.outcome !== 'suggestion') {
+      assert.equal('bristolType' in result, false, `${entry.id} must not carry a suggested form`);
+      assert.equal('color' in result, false, `${entry.id} must not carry a suggested color`);
+    }
+    assert.doesNotMatch(JSON.stringify(result), /base64|data:image|Bear\s?er|api[_-]?key/i, `${entry.id} must not echo image bytes or credentials`);
+  }
+});

tests/vision-readiness.test.js

@@ -0,0 +1,65 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { visionReadiness } from '../src/vision-readiness.js';
+
+test('unsolved readiness means manual logging is always reachable in one action', () => {
+  for (const status of [null, undefined, { enabled: false }, { enabled: true, providerReady: false }]) {
+    const readiness = visionReadiness(status);
+    assert.equal(readiness.ready, false, JSON.stringify(status));
+    assert.equal(readiness.manualOnly, true, JSON.stringify(status));
+    assert.equal(typeof readiness.manualLabel, 'string');
+    assert.match(readiness.manualLabel, /manual|without AI/i);
+  }
+});
+
+test('reports distinct phases so the UI never claims a worker is ready when it is not', () => {
+  assert.equal(visionReadiness(null).phase, 'checking');
+  assert.equal(visionReadiness({ enabled: false }).phase, 'disabled');
+  assert.equal(visionReadiness({ enabled: true, providerReady: false }).phase, 'offline');
+  // The readiness contract widened in #15: answering the provider probe is no longer enough.
+  assert.equal(visionReadiness({ enabled: true, providerReady: true }).phase, 'loading');
+  assert.equal(visionReadiness({ enabled: true, providerReady: true, modelSeen: false }).phase, 'loading');
+  assert.equal(visionReadiness({ enabled: true, providerReady: true, modelSeen: true }).phase, 'ready');
+});
+
+test('readiness waits for the pinned model to load before promising AI', () => {
+  // Issue #15: a worker that answers /v1/models has not necessarily loaded the model yet.
+  // Readiness must pass only after the pinned model is loaded, or the user is offered an
+  // AI control that fails after the upload.
+  const notLoaded = visionReadiness({
+    enabled: true,
+    profile: 'selfhost',
+    providerReady: true,
+    modelSeen: false,
+    model: 'SmolVLM2-2.2B-Instruct',
+  });
+  assert.equal(notLoaded.phase, 'loading');
+  assert.equal(notLoaded.ready, false);
+  assert.equal(notLoaded.manualOnly, true);
+  assert.match(notLoaded.message, /model/i);
+  assert.match(notLoaded.manualLabel, /manual|without AI/i);
+
+  const unverified = visionReadiness({ enabled: true, profile: 'selfhost', providerReady: true });
+  assert.equal(unverified.ready, false, 'an unconfirmed model must never be treated as loaded');
+});
+
+test('a loaded pinned model keeps AI analysis available and does not force the manual path', () => {
+  const readiness = visionReadiness({ enabled: true, providerReady: true, modelSeen: true, model: 'SmolVLM2-2.2B-Instruct' });
+  assert.equal(readiness.ready, true);
+  assert.equal(readiness.manualOnly, false);
+  assert.equal(readiness.manualLabel, '');
+});
+
+test('readiness never promises a symptom or diagnosis capability', () => {
+  for (const status of [
+    null,
+    { enabled: false },
+    { enabled: true, providerReady: false },
+    { enabled: true, providerReady: true, modelSeen: true },
+    { enabled: true, providerReady: true, modelSeen: false },
+  ]) {
+    const readiness = visionReadiness(status);
+    const copy = `${readiness.manualLabel} ${readiness.message}`;
+    assert.doesNotMatch(copy, /diagnos|bleeding|cancer|symptom/i);
+  }
+});

tests/vision-refusal.acceptance.mjs

@@ -0,0 +1,104 @@
+// Browser acceptance for issue #18: the refusal paths the corpus proves must be visible in the app,
+// not just in unit tests. The app talks to a real server.mjs with vision enabled, and the only thing
+// the harness chooses is which recorded corpus response the stub worker returns.
+import { chromium } from 'playwright';
+import assert from 'node:assert/strict';
+import { mkdir } from 'node:fs/promises';
+import { loadVisionCorpus } from '../src/vision-corpus.js';
+import { caseFor, corpusDir, startProvider, startServer, stopServer } from './helpers/vision-harness.mjs';
+
+await mkdir('artifacts', { recursive: true });
+const corpus = await loadVisionCorpus(corpusDir);
+const provider = await startProvider();
+const server = await startServer({ providerPort: provider.port, port: 4199 });
+const browser = await chromium.launch({ headless: true });
+const context = await browser.newContext({ viewport: { width: 390, height: 844 }, deviceScaleFactor: 2, serviceWorkers: 'block' });
+const page = await context.newPage();
+const errors = [];
+page.on('console', message => { if (message.type() === 'error') errors.push(message.text()); });
+page.on('pageerror', error => errors.push(error.message));
+// A fail-closed 503 is the intended boundary response, so the browser logs it as a failed resource.
+// It is expected exactly once; anything else is a real page error.
+const EXPECTED_FAIL_CLOSED_LOG = /Failed to load resource: the server responded with a status of 503 \(Service Unavailable\)/;
+
+async function closeSheet() {
+  await page.locator('#close-sheet').click();
+  await page.locator('.scan-sheet').waitFor({ state: 'detached' });
+}
+
+async function analyzeCorpusCase(entry) {
+  provider.state.content = entry.providerContent;
+  await page.locator('[data-scan]').click();
+  await page.getByText(/Self-hosted model ready/i).waitFor();
+  await page.locator('#gallery-photo').setInputFiles(`tests/fixtures/vision-corpus/${entry.file}`);
+  await page.locator('#ai-consent').check();
+  await page.locator('#analyze-photo').click();
+  await page.locator('.scan-result').first().waitFor();
+}
+
+try {
+  await page.goto('http://127.0.0.1:4199', { waitUntil: 'networkidle' });
+  await page.evaluate(() => localStorage.clear());
+  await page.reload({ waitUntil: 'networkidle' });
+
+  // 1. Non-stool photo: no prefill, a plain refusal, and manual entry still one action away.
+  await analyzeCorpusCase(caseFor(corpus, 'non-stool-scene'));
+  assert.equal(await page.getByText(/No confident match/i).isVisible(), true, 'a non-stool photo must refuse');
+  assert.equal(await page.locator('.ai-badge').count(), 0, 'a refusal must not carry an AI suggestion badge');
+  assert.equal(await page.getByText('Type 4', { exact: true }).count(), 0, 'a refusal must not prefill a form');
+  assert.match(await page.locator('.scan-result').innerText(), /does not clearly show stool/i);
+  const manual = page.locator('#manual-from-scan');
+  assert.match(await manual.innerText(), /Choose the form yourself/i);
+  await page.screenshot({ path: 'artifacts/vision-refusal-non-stool-mobile.png' });
+  await manual.click();
+  await page.getByText('Pick the closest form').waitFor();
+  assert.equal(await page.locator('.ai-prefill').count(), 0, 'refused analysis must not leave AI provenance in the log form');
+  await closeSheet();
+
+  // 2. Glare with unreadable visual fields: schema-valid, so it abstains calmly instead of erroring.
+  await analyzeCorpusCase(caseFor(corpus, 'glare-overexposed'));
+  assert.equal(await page.getByText(/No confident match/i).isVisible(), true);
+  assert.match(await page.locator('.scan-result').innerText(), /does not show a form Timmy can read safely/i);
+  assert.equal(await page.getByText(/couldn’t analyze that safely/i).count(), 0, 'a schema-valid abstention is not a failure');
+  await page.screenshot({ path: 'artifacts/vision-refusal-unreadable-fields-mobile.png' });
+  await closeSheet();
+
+  // 3. Out-of-range model output: fails closed, and the copy says plainly that nothing was applied.
+  await analyzeCorpusCase(caseFor(corpus, 'out-of-range-fields'));
+  await page.getByText(/couldn’t analyze that safely/i).waitFor();
+  assert.match(await page.locator('.scan-result').innerText(), /No suggestion was applied/i);
+  assert.doesNotMatch(await page.locator('.scan-result').innerText(), /out of range|Invalid AI response/i, 'provider detail must not reach the user');
+  assert.equal(await page.locator('.ai-badge').count(), 0);
+  await page.screenshot({ path: 'artifacts/vision-refusal-fail-closed-mobile.png' });
+  await closeSheet();
+
+  // 4. Issue #73: a filled-in field that is out of range fails closed even when the other field is blank.
+  // The old blank-first ordering abstained here, so the user was told the photo was unreadable while the
+  // model had actually returned an impossible value. The abstention copy must not appear on this path.
+  await analyzeCorpusCase(caseFor(corpus, 'blank-plus-out-of-range'));
+  await page.getByText(/couldn’t analyze that safely/i).waitFor();
+  assert.match(await page.locator('.scan-result').innerText(), /No suggestion was applied/i);
+  assert.equal(await page.getByText(/No confident match/i).count(), 0, 'a contract breach must not be shown as an abstention');
+  assert.equal(await page.locator('.ai-badge').count(), 0);
+  assert.doesNotMatch(await page.locator('.scan-result').innerText(), /out of range|Invalid AI response/i, 'provider detail must not reach the user');
+  await page.screenshot({ path: 'artifacts/vision-refusal-blank-plus-out-of-range-mobile.png' });
+  await closeSheet();
+
+  // 5. Positive control: the same corpus still yields a real suggestion when the response is usable.
+  await analyzeCorpusCase(caseFor(corpus, 'stool-like-formed'));
+  await page.getByText(/83% confidence/i).waitFor();
+  assert.equal(await page.getByText('Type 4', { exact: true }).isVisible(), true);
+  await page.screenshot({ path: 'artifacts/vision-corpus-suggestion-mobile.png' });
+
+  // Two fail-closed scenes reach the browser as real 503s; the count is asserted so a scene cannot be
+  // dropped silently, and any other console error still fails the run.
+  const failClosedLogs = errors.filter(message => EXPECTED_FAIL_CLOSED_LOG.test(message));
+  assert.equal(failClosedLogs.length, 2, 'each fail-closed response must reach the browser as a 503');
+  assert.deepEqual(errors.filter(message => !EXPECTED_FAIL_CLOSED_LOG.test(message)), []);
+  console.log('PASS vision corpus refusal: non-stool, unreadable fields, out-of-range, and blank-plus-out-of-range replies never prefill; the usable reply still suggests');
+} finally {
+  await context.close();
+  await browser.close();
+  await stopServer(server);
+  await provider.close();
+}

tests/worker-benchmark.test.js

@@ -0,0 +1,132 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { spawnSync, spawn } from 'node:child_process';
+import { chmod, mkdtemp, readFile, writeFile } from 'node:fs/promises';
+import { existsSync } from 'node:fs';
+import { join } from 'node:path';
+import { tmpdir } from 'node:os';
+
+const benchmark = new URL('../scripts/record_worker_benchmark.mjs', import.meta.url).pathname;
+const receiptsPath = new URL('../deploy/worker/receipts.json', import.meta.url);
+const ALIAS = 'SmolVLM2-2.2B-Instruct';
+
+const FAKE_WORKER = `#!/usr/bin/env python3
+import json, os
+from http.server import BaseHTTPRequestHandler, HTTPServer
+loaded = os.environ['WORKER_MODE'] == 'loaded'
+class Handler(BaseHTTPRequestHandler):
+    def do_GET(self):
+        body = json.dumps({'data': [{'id': os.environ['WORKER_ALIAS']}] if loaded else []}).encode()
+        self.send_response(200)
+        self.send_header('Content-Type', 'application/json')
+        self.end_headers()
+        self.wfile.write(body)
+    def log_message(self, *_):
+        pass
+HTTPServer(('127.0.0.1', int(os.environ['WORKER_PORT'])), Handler).serve_forever()
+`;
+
+async function sandbox() {
+  const dir = await mkdtemp(join(tmpdir(), 'timmy-bench-'));
+  const gpuProbe = join(dir, 'nvidia-smi-stub');
+  await writeFile(gpuProbe, '#!/bin/sh\nprintf "NVIDIA A40, 46068, 1234\\n"\n');
+  await chmod(gpuProbe, 0o755);
+  const worker = join(dir, 'worker.py');
+  await writeFile(worker, FAKE_WORKER);
+  return { dir, gpuProbe, worker, out: join(dir, 'worker-benchmark.json') };
+}
+
+async function startWorker(box, mode) {
+  const port = String(30000 + (process.pid % 2000));
+  const proc = spawn('python3', [box.worker], {
+    env: { ...process.env, WORKER_MODE: mode, WORKER_PORT: port, WORKER_ALIAS: ALIAS },
+    stdio: 'ignore',
+  });
+  for (let attempt = 0; attempt < 50; attempt += 1) {
+    const probe = spawnSync('bash', ['-c', `curl --silent --output /dev/null --max-time 1 http://127.0.0.1:${port}/v1/models`], { encoding: 'utf8' });
+    if (probe.status === 0) break;
+    await new Promise(resolve => setTimeout(resolve, 100));
+  }
+  return { proc, port };
+}
+
+function run(box, port, extra = []) {
+  return spawnSync('node', [benchmark, '--out', box.out, '--port', port, '--alias', ALIAS, '--gpu-probe', box.gpuProbe, ...extra], { encoding: 'utf8' });
+}
+
+test('a benchmark refuses to record numbers it did not measure on a GPU', async () => {
+  const box = await sandbox();
+  const { proc, port } = await startWorker(box, 'loaded');
+  try {
+    const result = spawnSync('node', [benchmark, '--out', box.out, '--port', port, '--alias', ALIAS, '--gpu-probe', join(box.dir, 'missing-smi')], { encoding: 'utf8' });
+    assert.notEqual(result.status, 0, 'measuring without a GPU probe must fail, not record zeros');
+    assert.match(result.stderr, /GPU|probe|VRAM/i);
+    assert.equal(existsSync(box.out), false, 'no receipt may be written from an unmeasured run');
+  } finally {
+    proc.kill('SIGKILL');
+  }
+});
+
+test('a benchmark refuses to time a model that is not loaded', async () => {
+  const box = await sandbox();
+  const { proc, port } = await startWorker(box, 'unloaded');
+  try {
+    const result = run(box, port);
+    assert.notEqual(result.status, 0);
+    assert.match(result.stderr, /not loaded|ready/i);
+    assert.equal(existsSync(box.out), false, 'an unloaded model must not produce a latency receipt');
+  } finally {
+    proc.kill('SIGKILL');
+  }
+});
+
+test('a benchmark records cold start, warm latency, VRAM, and the pins it measured', async () => {
+  const box = await sandbox();
+  const { proc, port } = await startWorker(box, 'loaded');
+  try {
+    const result = run(box, port, ['--warm-samples', '5', '--start-command', 'bash -c "sleep 0.3"']);
+    assert.equal(result.status, 0, result.stderr);
+    const receipt = JSON.parse(await readFile(box.out, 'utf8'));
+    assert.equal(receipt.status, 'measured_on_target_gpu');
+    assert.equal(receipt.worker.alias, ALIAS);
+    assert.match(receipt.worker.baseUrl, new RegExp(`^http://127\\.0\\.0\\.1:${port}/v1$`));
+    assert.match(receipt.gpu.name, /NVIDIA A40/);
+    assert.equal(receipt.gpu.vramUsedMiB, 1234);
+    assert.equal(receipt.gpu.vramTotalMiB, 46068);
+    assert.ok(receipt.coldStartMs >= 300, 'cold start is measured, not asserted');
+    assert.equal(receipt.warmLatencyMs.samples, 5);
+    assert.ok(receipt.warmLatencyMs.p50 >= 0 && receipt.warmLatencyMs.p95 >= receipt.warmLatencyMs.p50);
+
+    const receipts = JSON.parse(await readFile(receiptsPath, 'utf8'));
+    assert.equal(receipt.pins.llamaCppCommit, receipts.llamaCpp.commit);
+    assert.deepEqual(receipt.pins.modelSha256, receipts.models.map(model => model.sha256));
+  } finally {
+    proc.kill('SIGKILL');
+  }
+});
+
+test('a benchmark receipt carries no notes, image bytes, or user data', async () => {
+  const box = await sandbox();
+  const { proc, port } = await startWorker(box, 'loaded');
+  try {
+    const result = run(box, port, ['--warm-samples', '3']);
+    assert.equal(result.status, 0, result.stderr);
+    const raw = await readFile(box.out, 'utf8');
+    const receipt = JSON.parse(raw);
+    assert.deepEqual(Object.keys(receipt).sort(), [
+      'coldStartMs',
+      'gpu',
+      'measuredAt',
+      'pins',
+      'schemaVersion',
+      'status',
+      'warmLatencyMs',
+      'worker',
+    ]);
+    assert.doesNotMatch(raw, /data:image|base64|note|observations|symptom/i);
+    // Cold start that was not measured is recorded as unmeasured, never as zero.
+    assert.equal(receipt.coldStartMs, null);
+  } finally {
+    proc.kill('SIGKILL');
+  }
+});

tests/worker-container.test.js

@@ -0,0 +1,151 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { readFile } from 'node:fs/promises';
+import { spawnSync } from 'node:child_process';
+
+const dockerfilePath = new URL('../deploy/worker/Dockerfile', import.meta.url);
+const receiptsPath = new URL('../deploy/worker/receipts.json', import.meta.url);
+const buildScriptPath = new URL('../deploy/worker/build_image.sh', import.meta.url);
+const runScriptPath = new URL('../deploy/worker/run_worker_container.sh', import.meta.url);
+const dockerignorePath = new URL('../.dockerignore', import.meta.url);
+const bootstrapPath = new URL('../scripts/bootstrap_selfhost_smolvlm.sh', import.meta.url);
+
+async function recipe() {
+  const [dockerfile, receipts, buildScript, runScript, dockerignore, bootstrap] = await Promise.all([
+    readFile(dockerfilePath, 'utf8'),
+    readFile(receiptsPath, 'utf8').then(JSON.parse),
+    readFile(buildScriptPath, 'utf8'),
+    readFile(runScriptPath, 'utf8'),
+    readFile(dockerignorePath, 'utf8'),
+    readFile(bootstrapPath, 'utf8'),
+  ]);
+  return { dockerfile, receipts, buildScript, runScript, dockerignore, bootstrap };
+}
+
+function bootstrapDefault(script, name) {
+  const match = new RegExp(`^${name}="\\$\\{[A-Z0-9_]*:-([^}]+)\\}"$`, 'm').exec(script);
+  assert.ok(match, `bootstrap script must declare a default for ${name}`);
+  return match[1];
+}
+
+test('the worker image pins llama.cpp and both model hashes to the bootstrap receipts', async () => {
+  const { dockerfile, receipts, bootstrap } = await recipe();
+  const commit = bootstrapDefault(bootstrap, 'LLAMA_CPP_COMMIT');
+  const modelSha = bootstrapDefault(bootstrap, 'MODEL_SHA256');
+  const mmprojSha = bootstrapDefault(bootstrap, 'MMPROJ_SHA256');
+
+  // Receipts are the runtime/CI source of truth and must not drift from the host bootstrap.
+  assert.equal(receipts.llamaCpp.commit, commit);
+  assert.equal(receipts.llamaCpp.repository, 'https://github.com/ggml-org/llama.cpp');
+  assert.deepEqual(receipts.models.map(model => model.sha256), [modelSha, mmprojSha]);
+  assert.deepEqual(receipts.models.map(model => model.file), [
+    'SmolVLM2-2.2B-Instruct-Q4_K_M.gguf',
+    'mmproj-SmolVLM2-2.2B-Instruct-Q8_0.gguf',
+  ]);
+  assert.match(receipts.llamaCpp.commit, /^[0-9a-f]{40}$/);
+  for (const model of receipts.models) assert.match(model.sha256, /^[0-9a-f]{64}$/);
+
+  // The image builds the same pinned revision: the build args default to the receipts.
+  assert.match(dockerfile, new RegExp(`^ARG LLAMA_CPP_COMMIT=${commit}$`, 'm'));
+  assert.match(dockerfile, new RegExp(`^ARG MODEL_SHA256=${modelSha}$`, 'm'));
+  assert.match(dockerfile, new RegExp(`^ARG MMPROJ_SHA256=${mmprojSha}$`, 'm'));
+  assert.match(dockerfile, /git fetch --depth 1 origin "\$\{LLAMA_CPP_COMMIT\}"/);
+  assert.match(dockerfile, /git checkout --detach FETCH_HEAD/);
+});
+
+test('the worker image uses digest-pinned bases and refuses floating model sources', async () => {
+  const { dockerfile, receipts } = await recipe();
+
+  const froms = dockerfile.split('\n').filter(line => line.startsWith('FROM '));
+  assert.equal(froms.length, 2, 'the recipe is a build stage and a runtime stage');
+  for (const line of froms) assert.match(line, /@sha256:[0-9a-f]{64}/, `base must be digest-pinned: ${line}`);
+  // The recorded receipts and the recipe must name the same immutable bases.
+  const digests = froms.map(line => /@(sha256:[0-9a-f]{64})/.exec(line)[1]);
+  assert.deepEqual(digests, [receipts.baseImages.build.digest, receipts.baseImages.runtime.digest]);
+  assert.equal(receipts.baseImages.build.reference, 'nvidia/cuda:12.4.1-devel-ubuntu22.04');
+  assert.equal(receipts.baseImages.runtime.reference, 'nvidia/cuda:12.4.1-runtime-ubuntu22.04');
+  assert.doesNotMatch(dockerfile, /:latest|ggml-org\/llama\.cpp@?main|refs\/heads\/(?:main|master)/);
+  // Weights are never baked in; the model arrives as a read-only mount.
+  assert.doesNotMatch(dockerfile, /^COPY .*\.gguf/m);
+  assert.doesNotMatch(dockerfile, /^ADD /m);
+  assert.match(dockerfile, /\/models/);
+});
+
+test('the worker image runs unprivileged with no default credentials and a post-load healthcheck', async () => {
+  const { dockerfile } = await recipe();
+  // Directives may be wrapped with a line continuation; assert on the joined directive text.
+  const directives = dockerfile.replace(/\\\n\s*/g, ' ');
+
+  const user = /^USER (?!root)(\S+)$/m.exec(dockerfile);
+  assert.ok(user, 'the runtime stage must drop to an unprivileged user');
+  assert.match(user[1], /^\d+:\d+$/, 'use a numeric uid:gid so the image needs no passwd entry');
+  assert.doesNotMatch(dockerfile, /^ENV .*(?:API_KEY|TOKEN|PASSWORD|SECRET)[ =]/im);
+  // Health must gate on the loaded model, so the container is not "healthy" while it cannot answer.
+  assert.match(directives, /^HEALTHCHECK .*timmy-worker-ready/m);
+  assert.match(directives, /--start-period=\d+s/);
+  assert.match(directives, /--host", "127\.0\.0\.1"/, 'the health probe runs on the container loopback');
+  // The container listens inside its own network namespace; the run recipe, not the image, decides
+  // exposure and publishes on loopback only (asserted separately).
+  assert.match(dockerfile, /--host 0\.0\.0\.0|TIMMY_MODEL_HOST=0\.0\.0\.0/);
+});
+
+test('the build refuses a floating or missing pin before it reaches docker', async () => {
+  const floating = spawnSync('bash', [buildScriptPath.pathname, '--print-plan'], {
+    encoding: 'utf8',
+    env: { ...process.env, TIMMY_LLAMA_CPP_COMMIT: 'latest' },
+  });
+  assert.notEqual(floating.status, 0, 'a floating llama.cpp ref must be rejected');
+  assert.match(floating.stderr, /pin|40-hex|floating/i);
+
+  const missingSha = spawnSync('bash', [buildScriptPath.pathname, '--print-plan'], {
+    encoding: 'utf8',
+    env: { ...process.env, TIMMY_MODEL_SHA256: '' },
+  });
+  assert.notEqual(missingSha.status, 0, 'a missing model hash must be rejected');
+
+  const plan = spawnSync('bash', [buildScriptPath.pathname, '--print-plan'], { encoding: 'utf8' });
+  assert.equal(plan.status, 0, plan.stderr);
+  assert.match(plan.stdout, /llama\.cpp commit: [0-9a-f]{40}/);
+  assert.match(plan.stdout, /SmolVLM2-2\.2B-Instruct-Q4_K_M\.gguf sha256: [0-9a-f]{64}/);
+  assert.match(plan.stdout, /bind address: 127\.0\.0\.1:8080/);
+  assert.match(plan.stdout, /publish: 127\.0\.0\.1:8080/);
+});
+
+test('the run recipe publishes on loopback only and drops every privilege it can', async () => {
+  const { runScript } = await recipe();
+
+  assert.match(runScript, /127\.0\.0\.1:\$\{?PORT/);
+  assert.match(runScript, /--read-only/);
+  assert.match(runScript, /--cap-drop[= ]ALL/);
+  assert.match(runScript, /no-new-privileges/);
+  assert.match(runScript, /--security-opt/);
+  assert.doesNotMatch(runScript, /--privileged/);
+  assert.doesNotMatch(runScript, /-p "\$PORT:/);
+  assert.doesNotMatch(runScript, /\b0\.0\.0\.0\b/);
+  // The model mount is read-only, and no credential has a default value.
+  assert.match(runScript, /:ro\b/);
+  assert.doesNotMatch(runScript, /(?:API_KEY|TOKEN|PASSWORD)=[^\s"']/);
+});
+
+test('the run recipe refuses to publish the worker anywhere but loopback', async () => {
+  const hostile = spawnSync('bash', [runScriptPath.pathname, '--print-plan'], {
+    encoding: 'utf8',
+    env: { ...process.env, TIMMY_WORKER_PUBLISH_HOST: '0.0.0.0' },
+  });
+  assert.notEqual(hostile.status, 0, 'a non-loopback publish must be refused');
+  assert.match(hostile.stderr, /loopback|127\.0\.0\.1/i);
+
+  const plan = spawnSync('bash', [runScriptPath.pathname, '--print-plan'], { encoding: 'utf8' });
+  assert.equal(plan.status, 0, plan.stderr);
+  assert.match(plan.stdout, /publish: 127\.0\.0\.1:\d+/);
+});
+
+test('the build context excludes weights, user images, releases, and secrets', async () => {
+  const { dockerignore } = await recipe();
+
+  for (const pattern of ['*.gguf', 'artifacts/', 'video/', 'models/', '.git/', 'node_modules/', '.env', '.env.*']) {
+    assert.ok(dockerignore.split('\n').includes(pattern), `dockerignore must exclude ${pattern}`);
+  }
+  // Committed synthetic fixtures are fine, but a real medical corpus directory is never buildable.
+  assert.doesNotMatch(dockerignore, /^!.*\.gguf$/m);
+});

tests/worker-readiness.acceptance.mjs

@@ -0,0 +1,91 @@
+import { chromium } from 'playwright';
+import assert from 'node:assert/strict';
+import { mkdir } from 'node:fs/promises';
+
+// Issue #15: readiness must pass only after the pinned model is loaded. A worker that answers
+// /v1/models is reachable, but reachable is not loaded — the app must not offer an AI control
+// that fails after the upload.
+await mkdir('artifacts', { recursive: true });
+const browser = await chromium.launch({ headless: true });
+const context = await browser.newContext({ viewport: { width: 390, height: 844 }, deviceScaleFactor: 2, serviceWorkers: 'block' });
+const page = await context.newPage();
+const errors = [];
+page.on('console', message => { if (message.type() === 'error') errors.push(message.text()); });
+page.on('pageerror', error => errors.push(error.message));
+let modelLoaded = false;
+let analysisRequests = 0;
+await page.route('**/api/vision-status', route => route.fulfill({
+  status: 200,
+  contentType: 'application/json',
+  body: JSON.stringify({
+    enabled: true,
+    profile: 'selfhost',
+    processor: 'self-hosted',
+    model: 'SmolVLM2-2.2B-Instruct',
+    providerReady: true,
+    modelSeen: modelLoaded,
+  }),
+}));
+await page.route('**/api/analyze', route => {
+  analysisRequests += 1;
+  return route.fulfill({
+    status: 200,
+    contentType: 'application/json',
+    body: JSON.stringify({
+      status: 'suggestion',
+      isStool: true,
+      bristolType: 4,
+      color: 'brown',
+      confidence: 0.83,
+      imageQuality: 'good',
+      observations: 'Smooth, formed appearance.',
+      warning: 'Visual suggestion only. Confirm it yourself; this is not a diagnosis.',
+    }),
+  });
+});
+
+await page.goto('http://127.0.0.1:4173', { waitUntil: 'networkidle' });
+await page.evaluate(() => localStorage.clear());
+await page.reload({ waitUntil: 'networkidle' });
+
+// 1. Worker reachable, pinned model not loaded: no AI promise, no dead control, one action to manual.
+await page.locator('[data-scan]').click();
+await page.getByText(/model is not loaded/i).waitFor();
+// Visual acceptance: the not-loaded state must be visually distinct from the ready and offline
+// states, not an unstyled div that reads like either one of them.
+const loadingStatus = page.locator('.model-status.loading');
+assert.equal(await loadingStatus.count(), 1, 'the not-loaded state needs its own status treatment');
+assert.equal(await loadingStatus.evaluate(el => getComputedStyle(el).backgroundColor), 'rgb(253, 243, 216)');
+assert.equal(await page.getByText(/Self-hosted model ready/i).count(), 0, 'an unloaded model must never be reported ready');
+assert.equal(await page.locator('#analyze-photo').count(), 0, 'no analyze control before the model is loaded');
+await page.locator('#gallery-photo').setInputFiles('tests/fixtures/synthetic-type4.jpg');
+await page.getByText(/Ready for your review/i).waitFor();
+assert.equal(await page.getByText(/model is not loaded/i).count() > 0, true, 'the ready step still states why AI is unavailable');
+assert.equal(await page.locator('.consent-card').count(), 0, 'no consent is requested while the model is not loaded');
+assert.equal(await page.locator('#analyze-photo').count(), 0, 'no dead analyze control on the ready step');
+const fallback = page.locator('#manual-from-scan');
+assert.equal(await fallback.isVisible(), true);
+assert.match(await fallback.innerText(), /without AI|manual/i);
+await fallback.click();
+assert.equal(await page.getByText('Pick the closest form').isVisible(), true, 'one action reaches manual Bristol entry');
+assert.equal(analysisRequests, 0, 'nothing is uploaded before the pinned model is loaded');
+await page.screenshot({ path: 'artifacts/worker-model-loading-mobile.png' });
+await page.locator('#close-sheet').click();
+
+// 2. The pinned model loads: the same flow now offers consent and analysis, and analysis works.
+modelLoaded = true;
+await page.locator('[data-scan]').click();
+await page.getByText(/Self-hosted model ready/i).waitFor();
+await page.locator('#gallery-photo').setInputFiles('tests/fixtures/synthetic-type4.jpg');
+await page.getByText(/Ready for your review/i).waitFor();
+assert.equal(await page.locator('.consent-card').isVisible(), true, 'consent returns once the model is loaded');
+await page.locator('#ai-consent').check();
+await page.locator('#analyze-photo').click();
+await page.getByText(/83% confidence/i).waitFor();
+assert.equal(analysisRequests, 1, 'analysis is offered exactly when the model is loaded');
+await page.screenshot({ path: 'artifacts/worker-model-loaded-mobile.png' });
+
+assert.deepEqual(errors, []);
+await context.close();
+await browser.close();
+console.log('PASS readiness waits for the loaded pinned model: no AI control before load, full AI path after load');

tests/worker-ready.test.js

@@ -0,0 +1,107 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { spawnSync } from 'node:child_process';
+import { mkdtemp, readFile, writeFile } from 'node:fs/promises';
+import { join } from 'node:path';
+import { tmpdir } from 'node:os';
+
+const gate = new URL('../scripts/worker_ready.sh', import.meta.url).pathname;
+const bootstrap = new URL('../scripts/bootstrap_selfhost_smolvlm.sh', import.meta.url);
+const ALIAS = 'SmolVLM2-2.2B-Instruct';
+
+const FAKE_SERVER = `#!/usr/bin/env python3
+import json, os, sys
+from http.server import BaseHTTPRequestHandler, HTTPServer
+
+mode = os.environ['WORKER_MODE']
+counter_path = os.environ['WORKER_COUNTER']
+count = int(open(counter_path).read() or '0') if os.path.exists(counter_path) else 0
+
+class Handler(BaseHTTPRequestHandler):
+    def do_GET(self):
+        global count
+        count += 1
+        open(counter_path, 'w').write(str(count))
+        loaded = mode == 'loaded' or (mode == 'flip' and count > 2)
+        body = json.dumps({'data': [{'id': os.environ['WORKER_ALIAS']}] if loaded else []}).encode()
+        self.send_response(200)
+        self.send_header('Content-Type', 'application/json')
+        self.end_headers()
+        self.wfile.write(body)
+    def log_message(self, *_):
+        pass
+
+HTTPServer(('127.0.0.1', int(os.environ['WORKER_PORT'])), Handler).serve_forever()
+`;
+
+async function withWorker(mode, run) {
+  const sandbox = await mkdtemp(join(tmpdir(), 'timmy-worker-ready-'));
+  const counter = join(sandbox, 'count.txt');
+  await writeFile(counter, '0');
+  const server = join(sandbox, 'server.py');
+  await writeFile(server, FAKE_SERVER);
+  const port = String(20000 + (process.pid % 4000));
+  const { spawn } = await import('node:child_process');
+  const proc = spawn('python3', [server], {
+    env: { ...process.env, WORKER_MODE: mode, WORKER_COUNTER: counter, WORKER_PORT: port, WORKER_ALIAS: ALIAS },
+    stdio: 'ignore',
+  });
+  // Wait for the socket to accept connections before probing.
+  for (let attempt = 0; attempt < 50; attempt += 1) {
+    const probe = spawnSync('bash', ['-c', `curl --silent --output /dev/null --max-time 1 http://127.0.0.1:${port}/v1/models`], { encoding: 'utf8' });
+    if (probe.status === 0) break;
+    await new Promise(resolve => setTimeout(resolve, 100));
+  }
+  try {
+    return await run(port);
+  } finally {
+    proc.kill('SIGKILL');
+  }
+}
+
+function gateRun(port, extra = []) {
+  return spawnSync('bash', [gate, '--port', port, '--alias', ALIAS, ...extra], { encoding: 'utf8' });
+}
+
+test('readiness passes once the pinned model is actually served', async () => {
+  await withWorker('loaded', async port => {
+    const result = gateRun(port);
+    assert.equal(result.status, 0, result.stderr);
+    assert.match(result.stdout, new RegExp(`${ALIAS} is loaded`));
+  });
+});
+
+test('a reachable worker with the model still loading is not ready', async () => {
+  await withWorker('unloaded', async port => {
+    const result = gateRun(port);
+    assert.equal(result.status, 3, 'reachable-but-unloaded must be its own failure, not a network error');
+    assert.match(result.stderr, /not loaded yet/i);
+  });
+});
+
+test('an unreachable worker is reported as unreachable', async () => {
+  const result = spawnSync('bash', [gate, '--port', '9', '--alias', ALIAS], { encoding: 'utf8' });
+  assert.equal(result.status, 2);
+  assert.match(result.stderr, /not reachable/i);
+});
+
+test('readiness never probes anything but loopback', () => {
+  const result = spawnSync('bash', [gate, '--host', '10.0.0.5', '--port', '8080'], { encoding: 'utf8' });
+  assert.equal(result.status, 64);
+  assert.match(result.stderr, /loopback/i);
+});
+
+test('readiness can wait for the model load it is gating', async () => {
+  await withWorker('flip', async port => {
+    const started = Date.now();
+    const result = gateRun(port, ['--wait', '15']);
+    assert.equal(result.status, 0, result.stderr);
+    assert.ok(Date.now() - started >= 300, 'the gate must actually wait rather than pass on the first probe');
+  });
+});
+
+test('the bootstrap exposes the same post-load gate instead of duplicating it', async () => {
+  const script = await readFile(bootstrap, 'utf8');
+  assert.match(script, /worker_ready\.sh/);
+  assert.match(script, /^  ready\)$/m);
+});