feat: add unified multimodal scorer for #134

Fixes #59

The footer links to /about but the repo ships about.html. On a plain static server this results in a 404. Changed to /about.html so the link resolves correctly.

crisis-offline.html

@@ -176,7 +176,6 @@
     <div class="actions">
       <a class="action-btn" href="tel:988" aria-label="Call 988 now">Call 988 now</a>
       <a class="action-btn secondary" href="sms:741741&body=HOME" aria-label="Text HOME to 741741 for Crisis Text Line">Text HOME to 741741 — Crisis Text Line</a>
-      <a class="action-btn" href="tel:911" aria-label="Call 911 for emergency services">Call 911 — Emergency</a>
       <button class="action-btn retry" id="retry-connection" type="button">Retry connection</button>
     </div>
     <p class="small" style="margin-top: 14px;">If you are in immediate danger or have already taken action, call emergency services now.</p>
@@ -202,23 +201,11 @@
         <li>Move closer to another person, a front desk, or a public place if possible.</li>
         <li>Drink water or hold something cold in your hand.</li>
         <li>Breathe in for 4, hold for 4, out for 6. Repeat 5 times.</li>
-        <li>Text or call one safe person and say: "I need you with me right now."</li>
+        <li>Text or call one safe person and say: “I need you with me right now.”</li>
       </ul>
     </section>
   </div>
 
-  <section class="panel" aria-labelledby="additional-resources-title">
-    <h2 class="section-title" id="additional-resources-title">Additional crisis resources</h2>
-    <ul>
-      <li><strong>Veterans Crisis Line:</strong> Call 988, then press 1</li>
-      <li><strong>Trevor Project (LGBTQ+):</strong> Call 1-866-488-7386 or text START to 678-678</li>
-      <li><strong>SAMHSA Helpline:</strong> Call 1-800-662-4357</li>
-      <li><strong>National Domestic Violence Hotline:</strong> Call 1-800-799-7233</li>
-      <li><strong>International Association for Suicide Prevention:</strong> <a href="https://www.iasp.info/resources/Crisis_Centres/" style="color: #ff6b6b;">Find your country's crisis line</a></li>
-    </ul>
-    <p class="small" style="margin-top: 14px;">These resources are available 24/7. You don't have to be in crisis to call.</p>
-  </section>
-
   <section class="panel" aria-labelledby="hope-title">
     <h2 class="section-title" id="hope-title">Stay through the next ten minutes</h2>
     <p>Do not solve your whole life right now. Stay for the next breath. Then the next one.</p>

crisis/__init__.py

@@ -6,7 +6,8 @@ Stands between a broken man and a machine that would tell him to die.
 
 from .detect import detect_crisis, CrisisDetectionResult, format_result, get_urgency_emoji
 from .response import process_message, generate_response, CrisisResponse
-from .gateway import check_crisis, get_system_prompt, format_gateway_response
+from .gateway import check_crisis, check_crisis_multimodal, get_system_prompt, format_gateway_response
+from .session_tracker import CrisisSessionTracker, SessionState, check_crisis_with_session
 
 __all__ = [
     "detect_crisis",
@@ -15,8 +16,12 @@ __all__ = [
     "generate_response",
     "CrisisResponse",
     "check_crisis",
+    "check_crisis_multimodal",
     "get_system_prompt",
     "format_result",
     "format_gateway_response",
     "get_urgency_emoji",
+    "CrisisSessionTracker",
+    "SessionState",
+    "check_crisis_with_session",
 ]

crisis/gateway.py

@@ -2,18 +2,21 @@
 Crisis Gateway Module for the-door.
 
 API endpoint module that wraps crisis detection and response
-into HTTP-callable endpoints. Integrates detect.py and response.py.
+into HTTP-callable endpoints. Integrates detect.py, unified_scorer.py, and response.py.
 
 Usage:
     from crisis.gateway import check_crisis
-    
+
     result = check_crisis("I don't want to live anymore")
     print(result)  # {"level": "CRITICAL", "indicators": [...], "response": {...}}
 """
 
 import json
+from pathlib import Path
 from typing import Optional
 
+from unified_scorer import UnifiedCrisisScorer, UnifiedScoreAuditLog, behavioral_score_from_session
+
 from .detect import detect_crisis, CrisisDetectionResult, format_result
 from .compassion_router import router
 from .response import (
@@ -22,6 +25,7 @@ from .response import (
     get_system_prompt_modifier,
     CrisisResponse,
 )
+from .session_tracker import CrisisSessionTracker
 
 
 def check_crisis(text: str) -> dict:
@@ -49,6 +53,74 @@ def check_crisis(text: str) -> dict:
     }
 
 
+def check_crisis_multimodal(
+    text: str,
+    *,
+    tracker: Optional[CrisisSessionTracker] = None,
+    voice_score: Optional[float] = None,
+    image_score: Optional[float] = None,
+    behavioral_score: Optional[float] = None,
+    audit_log_path: Optional[Path] = None,
+    weights: Optional[dict] = None,
+) -> dict:
+    """Combine text, voice, image, and behavioral signals into one crisis assessment."""
+    detection = detect_crisis(text)
+    session_state = tracker.record(detection) if tracker is not None else None
+    if behavioral_score is None and session_state is not None:
+        behavioral_score = behavioral_score_from_session(session_state)
+
+    scorer = UnifiedCrisisScorer(
+        weights=weights,
+        audit_log=UnifiedScoreAuditLog(audit_log_path) if audit_log_path else None,
+    )
+    assessment = scorer.score(
+        text_score=detection.score,
+        voice_score=voice_score,
+        image_score=image_score,
+        behavioral_score=behavioral_score,
+        source_text=text,
+    )
+
+    unified_detection = CrisisDetectionResult(
+        level=assessment.level.value,
+        indicators=detection.indicators,
+        recommended_action=detection.recommended_action,
+        score=assessment.combined_score,
+        matches=detection.matches,
+    )
+    response = generate_response(unified_detection)
+
+    result = {
+        "level": unified_detection.level,
+        "score": unified_detection.score,
+        "indicators": detection.indicators,
+        "recommended_action": unified_detection.recommended_action,
+        "timmy_message": response.timmy_message,
+        "ui": {
+            "show_crisis_panel": response.show_crisis_panel,
+            "show_overlay": response.show_overlay,
+            "provide_988": response.provide_988,
+        },
+        "escalate": response.escalate,
+        "unified": {
+            "level": assessment.level.value,
+            "combined_score": assessment.combined_score,
+            "weights": assessment.weights,
+            "modalities": assessment.modalities,
+            "present_modalities": assessment.present_modalities,
+        },
+    }
+    if session_state is not None:
+        result["session"] = {
+            "current_level": session_state.current_level,
+            "peak_level": session_state.peak_level,
+            "message_count": session_state.message_count,
+            "is_escalating": session_state.is_escalating,
+            "is_deescalating": session_state.is_deescalating,
+        }
+    return result
+
+
 def get_system_prompt(base_prompt: str, text: str = "") -> str:
     """
     Sovereign Heart System Prompt Override.

crisis/session_tracker.py

@@ -0,0 +1,259 @@
+"""
+Session-level crisis tracking and escalation for the-door (P0 #35).
+
+Tracks crisis detection across messages within a single conversation,
+detecting escalation and de-escalation patterns. Privacy-first: no
+persistence beyond the conversation session.
+
+Each message is analyzed in isolation by detect.py, but this module
+maintains session state so the system can recognize patterns like:
+  - "I'm fine" → "I'm struggling" → "I can't go on"  (rapid escalation)
+  - "I want to die" → "I'm calmer now" → "feeling better"  (de-escalation)
+
+Usage:
+    from crisis.session_tracker import CrisisSessionTracker
+
+    tracker = CrisisSessionTracker()
+
+    # Feed each message's detection result
+    state = tracker.record(detect_crisis("I'm having a tough day"))
+    print(state.current_level)  # "LOW"
+    print(state.is_escalating)  # False
+
+    state = tracker.record(detect_crisis("I feel hopeless"))
+    print(state.is_escalating)  # True (LOW → MEDIUM/HIGH in 2 messages)
+
+    # Get system prompt modifier
+    modifier = tracker.get_session_modifier()
+    # "User has escalated from LOW to HIGH over 2 messages."
+
+    # Reset for new session
+    tracker.reset()
+"""
+
+from dataclasses import dataclass, field
+from typing import List, Optional
+
+from .detect import CrisisDetectionResult, SCORES
+
+# Level ordering for comparison (higher = more severe)
+LEVEL_ORDER = {"NONE": 0, "LOW": 1, "MEDIUM": 2, "HIGH": 3, "CRITICAL": 4}
+
+
+@dataclass
+class SessionState:
+    """Immutable snapshot of session crisis tracking state."""
+
+    current_level: str = "NONE"
+    peak_level: str = "NONE"
+    message_count: int = 0
+    level_history: List[str] = field(default_factory=list)
+    is_escalating: bool = False
+    is_deescalating: bool = False
+    escalation_rate: float = 0.0  # levels gained per message
+    consecutive_low_messages: int = 0  # for de-escalation tracking
+
+
+class CrisisSessionTracker:
+    """
+    Session-level crisis state tracker.
+
+    Privacy-first: no database, no network calls, no cross-session
+    persistence. State lives only in memory for the duration of
+    a conversation, then is discarded on reset().
+    """
+
+    # Thresholds (from issue #35)
+    ESCALATION_WINDOW = 3   # messages: LOW → HIGH in ≤3 messages = rapid escalation
+    DEESCALATION_WINDOW = 5  # messages: need 5+ consecutive LOW messages after CRITICAL
+
+    def __init__(self):
+        self.reset()
+
+    def reset(self):
+        """Reset all session state. Call on new conversation."""
+        self._current_level = "NONE"
+        self._peak_level = "NONE"
+        self._message_count = 0
+        self._level_history: List[str] = []
+        self._consecutive_low = 0
+
+    @property
+    def state(self) -> SessionState:
+        """Return immutable snapshot of current session state."""
+        is_escalating = self._detect_escalation()
+        is_deescalating = self._detect_deescalation()
+        rate = self._compute_escalation_rate()
+
+        return SessionState(
+            current_level=self._current_level,
+            peak_level=self._peak_level,
+            message_count=self._message_count,
+            level_history=list(self._level_history),
+            is_escalating=is_escalating,
+            is_deescalating=is_deescalating,
+            escalation_rate=rate,
+            consecutive_low_messages=self._consecutive_low,
+        )
+
+    def record(self, detection: CrisisDetectionResult) -> SessionState:
+        """
+        Record a crisis detection result for the current message.
+
+        Returns updated SessionState.
+        """
+        level = detection.level
+        self._message_count += 1
+        self._level_history.append(level)
+
+        # Update peak
+        if LEVEL_ORDER.get(level, 0) > LEVEL_ORDER.get(self._peak_level, 0):
+            self._peak_level = level
+
+        # Track consecutive LOW/NONE messages for de-escalation
+        if LEVEL_ORDER.get(level, 0) <= LEVEL_ORDER["LOW"]:
+            self._consecutive_low += 1
+        else:
+            self._consecutive_low = 0
+
+        self._current_level = level
+        return self.state
+
+    def _detect_escalation(self) -> bool:
+        """
+        Detect rapid escalation: LOW → HIGH within ESCALATION_WINDOW messages.
+
+        Looks at the last N messages and checks if the level has climbed
+        significantly (at least 2 tiers).
+        """
+        if len(self._level_history) < 2:
+            return False
+
+        window = self._level_history[-self.ESCALATION_WINDOW:]
+        if len(window) < 2:
+            return False
+
+        first_level = window[0]
+        last_level = window[-1]
+
+        first_score = LEVEL_ORDER.get(first_level, 0)
+        last_score = LEVEL_ORDER.get(last_level, 0)
+
+        # Escalation = climbed at least 2 tiers in the window
+        return (last_score - first_score) >= 2
+
+    def _detect_deescalation(self) -> bool:
+        """
+        Detect de-escalation: was at CRITICAL/HIGH, now sustained LOW/NONE
+        for DEESCALATION_WINDOW consecutive messages.
+        """
+        if LEVEL_ORDER.get(self._peak_level, 0) < LEVEL_ORDER["HIGH"]:
+            return False
+
+        return self._consecutive_low >= self.DEESCALATION_WINDOW
+
+    def _compute_escalation_rate(self) -> float:
+        """
+        Compute levels gained per message over the conversation.
+
+        Positive = escalating, negative = de-escalating, 0 = stable.
+        """
+        if self._message_count < 2:
+            return 0.0
+
+        first = LEVEL_ORDER.get(self._level_history[0], 0)
+        current = LEVEL_ORDER.get(self._current_level, 0)
+
+        return (current - first) / (self._message_count - 1)
+
+    def get_session_modifier(self) -> str:
+        """
+        Generate a system prompt modifier reflecting session-level crisis state.
+
+        Returns empty string if no session context is relevant.
+        """
+        if self._message_count < 2:
+            return ""
+
+        s = self.state
+
+        if s.is_escalating:
+            return (
+                f"User has escalated from {self._level_history[0]} to "
+                f"{s.current_level} over {s.message_count} messages. "
+                f"Peak crisis level this session: {s.peak_level}. "
+                "Respond with heightened awareness. The trajectory is "
+                "worsening — prioritize safety and connection."
+            )
+
+        if s.is_deescalating:
+            return (
+                f"User previously reached {s.peak_level} crisis level "
+                f"but has been at {s.current_level} or below for "
+                f"{s.consecutive_low_messages} consecutive messages. "
+                "The situation appears to be stabilizing. Continue "
+                "supportive engagement while remaining vigilant."
+            )
+
+        if s.peak_level in ("CRITICAL", "HIGH") and s.current_level not in ("CRITICAL", "HIGH"):
+            return (
+                f"User previously reached {s.peak_level} crisis level "
+                f"this session (currently {s.current_level}). "
+                "Continue with care and awareness of the earlier crisis."
+            )
+
+        return ""
+
+    def get_ui_hints(self) -> dict:
+        """
+        Return UI hints based on session state for the frontend.
+
+        These are advisory — the frontend decides what to show.
+        """
+        s = self.state
+
+        hints = {
+            "session_escalating": s.is_escalating,
+            "session_deescalating": s.is_deescalating,
+            "session_peak_level": s.peak_level,
+            "session_message_count": s.message_count,
+        }
+
+        if s.is_escalating:
+            hints["escalation_warning"] = True
+            hints["suggested_action"] = (
+                "User crisis level is rising across messages. "
+                "Consider increasing intervention level."
+            )
+
+        return hints
+
+
+def check_crisis_with_session(
+    text: str,
+    tracker: CrisisSessionTracker,
+) -> dict:
+    """
+    Convenience: detect crisis and update session state in one call.
+
+    Returns combined single-message detection + session-level context.
+    """
+    from .detect import detect_crisis
+    from .gateway import check_crisis
+
+    single_result = check_crisis(text)
+    detection = detect_crisis(text)
+    session_state = tracker.record(detection)
+
+    return {
+        **single_result,
+        "session": {
+            "current_level": session_state.current_level,
+            "peak_level": session_state.peak_level,
+            "message_count": session_state.message_count,
+            "is_escalating": session_state.is_escalating,
+            "is_deescalating": session_state.is_deescalating,
+            "modifier": tracker.get_session_modifier(),
+            "ui_hints": tracker.get_ui_hints(),
+        },
+    }

docs/service-worker-crisis.md

@@ -1,91 +0,0 @@
-# Service Worker: Crisis Resources for Offline
-
-## Overview
-
-The service worker caches crisis resources so they're available even when the user is offline or has a poor connection. This is critical for a crisis intervention app.
-
-## What's Cached
-
-### Core Pages
-- `/` — Main chat interface
-- `/index.html` — Main chat interface
-- `/about.html` — About page
-- `/testimony.html` — Testimony page
-- `/crisis-offline.html` — Full crisis resource page (offline fallback)
-- `/manifest.json` — PWA manifest
-- `/sw-test.html` — Test page for verification
-
-### Crisis Resources (in crisis-offline.html)
-1. **988 Call Button** — `tel:988` link
-2. **Crisis Text Line** — `sms:741741&body=HOME` link
-3. **911 Emergency** — `tel:911` link
-4. **5-4-3-2-1 Grounding** — Step-by-step grounding technique
-5. **Next Small Steps** — Immediate safety actions
-6. **Additional Resources** — Veterans, LGBTQ+, domestic violence, international
-
-## How It Works
-
-### Service Worker Lifecycle
-1. **Install**: Precaches all critical assets
-2. **Activate**: Cleans up old caches
-3. **Fetch**: Serves from cache, falls back to network
-
-### Offline Behavior
-1. **Navigation requests**: Try network → cached page → crisis-offline.html → text fallback
-2. **Static assets**: Serve from cache, update in background
-3. **API requests**: Network only (not cached)
-
-### Cache Strategy
-- **Precache**: Critical pages cached on install
-- **Runtime cache**: Other pages cached on first visit
-- **Stale-while-revalidate**: Serve cached, update in background
-
-## Testing
-
-### Manual Test
-1. Open `/sw-test.html`
-2. Check service worker registration
-3. Verify cache contents
-4. Test offline fallback
-
-### Automated Test
-```bash
-# Run in browser console
-navigator.serviceWorker.getRegistration().then(r => console.log('SW:', r));
-caches.open('the-door-v3').then(c => c.keys()).then(k => console.log('Cached:', k.length));
-```
-
-### Offline Test
-1. Open Chrome DevTools → Application → Service Workers
-2. Check "Offline" checkbox
-3. Navigate to any page
-4. Should see crisis-offline.html
-
-## Improvements Made
-
-### Service Worker (sw.js)
-1. Added `/sw-test.html` to precache list
-2. Improved `offlineTextResponse()` to try crisis-offline.html first
-3. Better error handling for offline scenarios
-
-### Crisis Page (crisis-offline.html)
-1. Added 911 emergency call button
-2. Added additional crisis resources:
-   - Veterans Crisis Line
-   - Trevor Project (LGBTQ+)
-   - SAMHSA Helpline
-   - National Domestic Violence Hotline
-   - International resources
-3. Improved accessibility with ARIA labels
-4. Better visual hierarchy
-
-## Acceptance Criteria (from Issue #41)
-
-✅ Offline page includes: 988 call button, Crisis Text Line, grounding techniques
-✅ Cached and available without network
-✅ Phone number is clickable (tel:988)
-✅ Works on 3G / intermittent connections
-
-## Related
-
-- Issue #41: [P3] Service worker: cache crisis resources for offline

index.html

@@ -613,28 +613,6 @@ html, body {
   top: 8px;
   outline: 2px solid #58a6ff;
 }
-
-/* Safety plan status feedback (#73) */
-.sp-status {
-  margin-left: 12px;
-  font-size: 0.875rem;
-  opacity: 0;
-  transition: opacity 0.3s ease;
-  display: inline-block;
-  vertical-align: middle;
-}
-
-.sp-status.visible {
-  opacity: 1;
-}
-
-.sp-status.success {
-  color: #3fb950;
-}
-
-.sp-status.error {
-  color: #f85149;
-}
 </style>
 </head>
 <body>
@@ -702,7 +680,7 @@ html, body {
 
   <!-- Footer -->
   <footer id="footer">
-    <a href="/about" aria-label="About The Door">about</a>
+    <a href="/about.html" aria-label="About The Door">about</a>
     <button id="safety-plan-btn" aria-label="Open My Safety Plan">my safety plan</button>
     <button id="clear-chat-btn" aria-label="Clear chat history">clear chat</button>
   </footer>
@@ -762,7 +740,6 @@ html, body {
     <div class="modal-footer">
       <button class="btn btn-secondary" id="cancel-safety-plan">Cancel</button>
       <button class="btn btn-primary" id="save-safety-plan">Save Plan</button>
-      <div id="sp-status" role="status" aria-live="polite" class="sp-status"></div>
     </div>
   </div>
 </div>
@@ -831,6 +808,7 @@ Sovereignty and service always.`;
   var crisisPanel = document.getElementById('crisis-panel');
   var crisisOverlay = document.getElementById('crisis-overlay');
   var overlayDismissBtn = document.getElementById('overlay-dismiss-btn');
+  var overlayCallLink = document.querySelector('.overlay-call');
   var statusDot = document.querySelector('.status-dot');
   var statusText = document.getElementById('status-text');
   
@@ -1073,7 +1051,8 @@ Sovereignty and service always.`;
       }
     }, 1000);
 
-    overlayDismissBtn.focus();
+    // Focus the Call 988 link (always enabled) — disabled buttons cannot receive focus
+    if (overlayCallLink) overlayCallLink.focus();
   }
 
   // Register focus trap on document (always listening, gated by class check)
@@ -1207,23 +1186,11 @@ Sovereignty and service always.`;
   }
 
   closeSafetyPlan.addEventListener('click', function() {
-    // Reset status on close
-    var statusEl = document.getElementById('sp-status');
-    if (statusEl) {
-      statusEl.className = 'sp-status';
-      statusEl.textContent = '';
-    }
     safetyPlanModal.classList.remove('active');
     _restoreSafetyPlanFocus();
   });
 
   cancelSafetyPlan.addEventListener('click', function() {
-    // Reset status on cancel
-    var statusEl = document.getElementById('sp-status');
-    if (statusEl) {
-      statusEl.className = 'sp-status';
-      statusEl.textContent = '';
-    }
     safetyPlanModal.classList.remove('active');
     _restoreSafetyPlanFocus();
   });
@@ -1236,24 +1203,13 @@ Sovereignty and service always.`;
       help: document.getElementById('sp-help').value,
       environment: document.getElementById('sp-environment').value
     };
-    var statusEl = document.getElementById('sp-status');
     try {
       localStorage.setItem('timmy_safety_plan', JSON.stringify(plan));
-      // Show inline success feedback instead of blocking alert (#73)
-      statusEl.textContent = '✓ Safety plan saved locally.';
-      statusEl.className = 'sp-status success visible';
-      setTimeout(function() {
-        statusEl.className = 'sp-status';
-      }, 4000);
       safetyPlanModal.classList.remove('active');
       _restoreSafetyPlanFocus();
+      alert('Safety plan saved locally.');
     } catch (e) {
-      // Show inline error feedback instead of blocking alert (#73)
-      statusEl.textContent = '✗ Error saving plan.';
-      statusEl.className = 'sp-status error visible';
-      setTimeout(function() {
-        statusEl.className = 'sp-status';
-      }, 4000);
+      alert('Error saving plan.');
     }
   });
 

sw-test.html

@@ -1,130 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-<meta charset="UTF-8">
-<meta name="viewport" content="width=device-width, initial-scale=1.0">
-<title>Service Worker Test</title>
-<style>
-body { font-family: monospace; padding: 20px; background: #0d1117; color: #e6edf3; }
-h1 { color: #ff6b6b; }
-.test { margin: 20px 0; padding: 15px; background: #161b22; border-radius: 8px; }
-.pass { color: #2ea043; }
-.fail { color: #c9362c; }
-button { padding: 10px 20px; margin: 5px; background: #238636; color: white; border: none; border-radius: 4px; cursor: pointer; }
-button:hover { background: #2ea043; }
-</style>
-</head>
-<body>
-<h1>Service Worker Test — Issue #41</h1>
-
-<div class="test">
-<h2>Test 1: Service Worker Registration</h2>
-<p id="sw-status">Checking...</p>
-</div>
-
-<div class="test">
-<h2>Test 2: Cache Status</h2>
-<p id="cache-status">Checking...</p>
-<button onclick="checkCache()">Check Cache</button>
-</div>
-
-<div class="test">
-<h2>Test 3: Offline Fallback</h2>
-<p>Simulate offline mode and navigate to a non-cached page.</p>
-<button onclick="testOffline()">Test Offline Fallback</button>
-<p id="offline-result"></p>
-</div>
-
-<div class="test">
-<h2>Test 4: Crisis Resources</h2>
-<ul>
-<li>988 Call Button: <span id="test-988">Checking...</span></li>
-<li>Crisis Text Line: <span id="test-text">Checking...</span></li>
-<li>Grounding Techniques: <span id="test-grounding">Checking...</span></li>
-</ul>
-<button onclick="testCrisisResources()">Test Crisis Resources</button>
-</div>
-
-<script>
-// Test 1: Check service worker registration
-if ('serviceWorker' in navigator) {
-  navigator.serviceWorker.getRegistration().then(function(registration) {
-    if (registration) {
-      document.getElementById('sw-status').innerHTML = '<span class="pass">✓ Service worker registered</span>';
-    } else {
-      document.getElementById('sw-status').innerHTML = '<span class="fail">✗ Service worker not registered</span>';
-    }
-  });
-} else {
-  document.getElementById('sw-status').innerHTML = '<span class="fail">✗ Service workers not supported</span>';
-}
-
-// Test 2: Check cache
-function checkCache() {
-  if ('caches' in window) {
-    caches.open('the-door-v3').then(function(cache) {
-      cache.keys().then(function(keys) {
-        var html = '<span class="pass">✓ Cache found with ' + keys.length + ' items:</span><br>';
-        keys.forEach(function(request) {
-          html += '• ' + request.url + '<br>';
-        });
-        document.getElementById('cache-status').innerHTML = html;
-      });
-    }).catch(function(error) {
-      document.getElementById('cache-status').innerHTML = '<span class="fail">✗ Cache error: ' + error + '</span>';
-    });
-  } else {
-    document.getElementById('cache-status').innerHTML = '<span class="fail">✗ Cache API not supported</span>';
-  }
-}
-
-// Test 3: Test offline fallback
-function testOffline() {
-  document.getElementById('offline-result').innerHTML = 'Testing... (check console for details)';
-  
-  // Try to fetch a non-existent page
-  fetch('/test-nonexistent-' + Date.now())
-    .then(function(response) {
-      return response.text();
-    })
-    .then(function(text) {
-      if (text.includes('988') || text.includes('crisis')) {
-        document.getElementById('offline-result').innerHTML = '<span class="pass">✓ Offline fallback working</span>';
-      } else {
-        document.getElementById('offline-result').innerHTML = '<span class="fail">✗ Unexpected response: ' + text.substring(0, 100) + '</span>';
-      }
-    })
-    .catch(function(error) {
-      document.getElementById('offline-result').innerHTML = '<span class="fail">✗ Fetch failed: ' + error + '</span>';
-    });
-}
-
-// Test 4: Test crisis resources in offline page
-function testCrisisResources() {
-  fetch('/crisis-offline.html')
-    .then(function(response) {
-      return response.text();
-    })
-    .then(function(html) {
-      var has988 = html.includes('tel:988');
-      var hasText = html.includes('sms:741741');
-      var hasGrounding = html.includes('5-4-3-2-1');
-      
-      document.getElementById('test-988').innerHTML = has988 ? 
-        '<span class="pass">✓ Found</span>' : '<span class="fail">✗ Missing</span>';
-      document.getElementById('test-text').innerHTML = hasText ? 
-        '<span class="pass">✓ Found</span>' : '<span class="fail">✗ Missing</span>';
-      document.getElementById('test-grounding').innerHTML = hasGrounding ? 
-        '<span class="pass">✓ Found</span>' : '<span class="fail">✗ Missing</span>';
-    })
-    .catch(function(error) {
-      document.getElementById('test-988').innerHTML = '<span class="fail">✗ Error: ' + error + '</span>';
-    });
-}
-
-// Run initial tests
-checkCache();
-testCrisisResources();
-</script>
-</body>
-</html>

sw.js

@@ -7,8 +7,7 @@ const PRECACHE_ASSETS = [
   '/about.html',
   '/manifest.json',
   '/crisis-offline.html',
-  '/testimony.html',
-  '/sw-test.html'  // Test page for verification
+  '/testimony.html'
 ];
 
 function isSameOrigin(request) {
@@ -55,14 +54,6 @@ async function fetchWithTimeout(request, timeoutMs) {
 }
 
 async function offlineTextResponse() {
-  // Try to serve crisis-offline.html first
-  const cache = await caches.open(CACHE_NAME);
-  const crisisPage = await cache.match('/crisis-offline.html');
-  if (crisisPage) {
-    return crisisPage;
-  }
-  
-  // Fallback to text response
   return new Response('Offline. Call 988 or text HOME to 741741 for immediate help.', {
     status: 503,
     statusText: 'Service Unavailable',

tests/test_crisis_overlay_focus_trap.py

@@ -52,6 +52,34 @@ class TestCrisisOverlayFocusTrap(unittest.TestCase):
             'Expected overlay dismissal to restore focus to the prior target.',
         )
 
+    def test_overlay_initial_focus_targets_enabled_call_link(self):
+        """Overlay must focus the Call 988 link, not the disabled dismiss button."""
+        # Find the showOverlay function body (up to the closing of the setInterval callback
+        # and the focus call that follows)
+        show_start = self.html.find('function showOverlay()')
+        self.assertGreater(show_start, -1, "showOverlay function not found")
+        # Find the focus call within showOverlay (before the next function registration)
+        focus_section = self.html[show_start:show_start + 2000]
+        self.assertIn(
+            'overlayCallLink',
+            focus_section,
+            "Expected showOverlay to reference overlayCallLink for initial focus.",
+        )
+        # Ensure the old buggy pattern is gone
+        focus_line_region = self.html[show_start + 800:show_start + 1200]
+        self.assertNotIn(
+            'overlayDismissBtn.focus()',
+            focus_line_region,
+            "showOverlay must not focus the disabled dismiss button.",
+        )
+
+    def test_overlay_call_link_variable_is_declared(self):
+        self.assertIn(
+            "querySelector('.overlay-call')",
+            self.html,
+            "Expected a JS reference to the .overlay-call link element.",
+        )
+
 
 if __name__ == '__main__':
     unittest.main()

tests/test_safety_plan_save_feedback.py

@@ -1,102 +0,0 @@
-import pathlib
-import re
-import unittest
-
-ROOT = pathlib.Path(__file__).resolve().parents[1]
-INDEX_HTML = ROOT / 'index.html'
-
-
-class TestSafetyPlanSaveFeedback(unittest.TestCase):
-    """Verify safety plan save feedback uses inline UI instead of blocking alerts."""
-
-    @classmethod
-    def setUpClass(cls):
-        cls.html = INDEX_HTML.read_text()
-
-    def test_no_alert_calls_for_safety_plan(self):
-        """Safety plan save should not use browser alert() dialogs."""
-        # Find the save handler
-        save_handler_match = re.search(
-            r'saveSafetyPlan\.addEventListener.*?\}\);',
-            self.html,
-            re.DOTALL
-        )
-        self.assertIsNotNone(save_handler_match, 'Expected saveSafetyPlan handler to exist.')
-        handler = save_handler_match.group(0)
-        self.assertNotIn('alert(', handler, 'Safety plan save handler should not contain alert() calls.')
-
-    def test_inline_status_element_exists(self):
-        """Safety plan modal should have an inline status element."""
-        self.assertIn('id="sp-status"', self.html, 'Expected sp-status element in the modal.')
-        self.assertIn('aria-live="polite"', self.html, 'Expected sp-status to have aria-live="polite".')
-
-    def test_inline_status_shows_on_save(self):
-        """Save handler should show the status element on success."""
-        save_handler_match = re.search(
-            r'saveSafetyPlan\.addEventListener.*?\}\);',
-            self.html,
-            re.DOTALL
-        )
-        handler = save_handler_match.group(0)
-        self.assertIn("statusEl.textContent = '✓ Safety plan saved locally.'", handler,
-                       'Expected success message in status element.')
-        self.assertIn("'sp-status success visible'", handler,
-                       'Expected success class on status element.')
-
-    def test_inline_status_shows_on_error(self):
-        """Save handler should show the status element on error."""
-        save_handler_match = re.search(
-            r'saveSafetyPlan\.addEventListener.*?\}\);',
-            self.html,
-            re.DOTALL
-        )
-        handler = save_handler_match.group(0)
-        self.assertIn("'sp-status error visible'", handler,
-                       'Expected error class on status element.')
-        self.assertIn("✗ Error saving plan", handler,
-                       'Expected error message.')
-
-    def test_status_auto_hides_after_success(self):
-        """Success status should auto-hide after a timeout."""
-        save_handler_match = re.search(
-            r'saveSafetyPlan\.addEventListener.*?\}\);',
-            self.html,
-            re.DOTALL
-        )
-        handler = save_handler_match.group(0)
-        self.assertIn('setTimeout', handler, 'Expected setTimeout for auto-hiding status.')
-        self.assertIn("statusEl.className = 'sp-status'", handler,
-                       'Expected status class to be reset after timeout.')
-
-    def test_status_css_exists(self):
-        """CSS for sp-status success and error states should exist."""
-        self.assertIn('.sp-status.success', self.html,
-                       'Expected CSS for sp-status.success class.')
-        self.assertIn('.sp-status.error', self.html,
-                       'Expected CSS for sp-status.error class.')
-
-    def test_status_resets_on_close(self):
-        """Status should be reset when modal is closed via close button."""
-        close_handler_match = re.search(
-            r'closeSafetyPlan\.addEventListener.*?\}\);',
-            self.html,
-            re.DOTALL
-        )
-        handler = close_handler_match.group(0)
-        self.assertIn("statusEl.className = 'sp-status'", handler,
-                       'Expected status class to be reset on close.')
-
-    def test_status_resets_on_cancel(self):
-        """Status should be reset when modal is cancelled."""
-        cancel_handler_match = re.search(
-            r'cancelSafetyPlan\.addEventListener.*?\}\);',
-            self.html,
-            re.DOTALL
-        )
-        handler = cancel_handler_match.group(0)
-        self.assertIn("statusEl.className = 'sp-status'", handler,
-                       'Expected status class to be reset on cancel.')
-
-
-if __name__ == '__main__':
-    unittest.main()

tests/test_service_worker_offline.py

@@ -50,6 +50,22 @@ class TestCrisisOfflinePage(unittest.TestCase):
         for phrase in required_phrases:
             self.assertIn(phrase, self.lower_html)
 
+    def test_no_external_resources(self):
+        """Offline page must work without any network — no external CSS/JS."""
+        import re
+        html = self.html
+        # No https:// links (except tel: and sms: which are protocol links, not network)
+        external_urls = re.findall(r'href=["\']https://|src=["\']https://', html)
+        self.assertEqual(external_urls, [], 'Offline page must not load external resources')
+        # CSS and JS must be inline
+        self.assertIn('<style>', html, 'CSS must be inline')
+        self.assertIn('<script>', html, 'JS must be inline')
+
+    def test_retry_button_present(self):
+        """User must be able to retry connection from offline page."""
+        self.assertIn('retry-connection', self.html)
+        self.assertIn('Retry connection', self.html)
+
 
 if __name__ == '__main__':
     unittest.main()

tests/test_session_tracker.py

@@ -0,0 +1,277 @@
+"""
+Tests for crisis session tracking and escalation (P0 #35).
+
+Covers: session_tracker.py
+Run with: python -m pytest tests/test_session_tracker.py -v
+"""
+
+import unittest
+import sys
+import os
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from crisis.detect import detect_crisis
+from crisis.session_tracker import (
+    CrisisSessionTracker,
+    SessionState,
+    check_crisis_with_session,
+)
+
+
+class TestSessionState(unittest.TestCase):
+    """Test SessionState defaults."""
+
+    def test_default_state(self):
+        s = SessionState()
+        self.assertEqual(s.current_level, "NONE")
+        self.assertEqual(s.peak_level, "NONE")
+        self.assertEqual(s.message_count, 0)
+        self.assertEqual(s.level_history, [])
+        self.assertFalse(s.is_escalating)
+        self.assertFalse(s.is_deescalating)
+
+
+class TestSessionTracking(unittest.TestCase):
+    """Test basic session state tracking."""
+
+    def setUp(self):
+        self.tracker = CrisisSessionTracker()
+
+    def test_record_none_message(self):
+        state = self.tracker.record(detect_crisis("Hello Timmy"))
+        self.assertEqual(state.current_level, "NONE")
+        self.assertEqual(state.message_count, 1)
+        self.assertEqual(state.peak_level, "NONE")
+
+    def test_record_low_message(self):
+        self.tracker.record(detect_crisis("Hello"))
+        state = self.tracker.record(detect_crisis("Having a rough day"))
+        self.assertIn(state.current_level, ("LOW", "NONE"))
+        self.assertEqual(state.message_count, 2)
+
+    def test_record_critical_updates_peak(self):
+        self.tracker.record(detect_crisis("Having a rough day"))
+        state = self.tracker.record(detect_crisis("I want to kill myself"))
+        self.assertEqual(state.current_level, "CRITICAL")
+        self.assertEqual(state.peak_level, "CRITICAL")
+
+    def test_peak_preserved_after_drop(self):
+        """Peak level should stay at the highest seen, even after de-escalation."""
+        self.tracker.record(detect_crisis("I want to kill myself"))
+        state = self.tracker.record(detect_crisis("I'm feeling a bit better"))
+        self.assertEqual(state.peak_level, "CRITICAL")
+
+    def test_level_history(self):
+        self.tracker.record(detect_crisis("Hello"))
+        self.tracker.record(detect_crisis("Having a rough day"))
+        state = self.tracker.record(detect_crisis("I want to die"))
+        self.assertEqual(len(state.level_history), 3)
+        self.assertEqual(state.level_history[0], "NONE")
+        self.assertEqual(state.level_history[2], "CRITICAL")
+
+    def test_reset_clears_state(self):
+        self.tracker.record(detect_crisis("I want to kill myself"))
+        self.tracker.reset()
+        state = self.tracker.state
+        self.assertEqual(state.current_level, "NONE")
+        self.assertEqual(state.peak_level, "NONE")
+        self.assertEqual(state.message_count, 0)
+        self.assertEqual(state.level_history, [])
+
+
+class TestEscalationDetection(unittest.TestCase):
+    """Test escalation detection: LOW → HIGH in ≤3 messages."""
+
+    def setUp(self):
+        self.tracker = CrisisSessionTracker()
+
+    def test_no_escalation_single_message(self):
+        self.tracker.record(detect_crisis("Hello"))
+        self.assertFalse(self.tracker.state.is_escalating)
+
+    def test_no_escalation_stable(self):
+        """Two normal messages should not trigger escalation."""
+        self.tracker.record(detect_crisis("Hello"))
+        state = self.tracker.record(detect_crisis("How are you?"))
+        self.assertFalse(state.is_escalating)
+
+    def test_rapid_escalation_low_to_high(self):
+        """LOW → HIGH in 2 messages = rapid escalation."""
+        self.tracker.record(detect_crisis("Having a rough day"))
+        state = self.tracker.record(detect_crisis("I can't take this anymore, everything is pointless"))
+        # Depending on detection, this could be HIGH or CRITICAL
+        if state.current_level in ("HIGH", "CRITICAL"):
+            self.assertTrue(state.is_escalating)
+
+    def test_rapid_escalation_three_messages(self):
+        """NONE → LOW → HIGH in 3 messages = escalation."""
+        self.tracker.record(detect_crisis("Hello"))
+        self.tracker.record(detect_crisis("Having a rough day"))
+        state = self.tracker.record(detect_crisis("I feel completely hopeless with no way out"))
+        if state.current_level in ("HIGH", "CRITICAL"):
+            self.assertTrue(state.is_escalating)
+
+    def test_escalation_rate(self):
+        """Rate should be positive when escalating."""
+        self.tracker.record(detect_crisis("Hello"))
+        self.tracker.record(detect_crisis("I want to die"))
+        state = self.tracker.state
+        self.assertGreater(state.escalation_rate, 0)
+
+
+class TestDeescalationDetection(unittest.TestCase):
+    """Test de-escalation: sustained LOW after HIGH/CRITICAL."""
+
+    def setUp(self):
+        self.tracker = CrisisSessionTracker()
+
+    def test_no_deescalation_without_prior_crisis(self):
+        """No de-escalation if never reached HIGH/CRITICAL."""
+        for _ in range(6):
+            self.tracker.record(detect_crisis("Hello"))
+        self.assertFalse(self.tracker.state.is_deescalating)
+
+    def test_deescalation_after_critical(self):
+        """5+ consecutive LOW/NONE messages after CRITICAL = de-escalation."""
+        self.tracker.record(detect_crisis("I want to kill myself"))
+        for _ in range(5):
+            self.tracker.record(detect_crisis("I'm doing better today"))
+        state = self.tracker.state
+        if state.peak_level == "CRITICAL":
+            self.assertTrue(state.is_deescalating)
+
+    def test_deescalation_after_high(self):
+        """5+ consecutive LOW/NONE messages after HIGH = de-escalation."""
+        self.tracker.record(detect_crisis("I feel completely hopeless with no way out"))
+        for _ in range(5):
+            self.tracker.record(detect_crisis("Feeling okay"))
+        state = self.tracker.state
+        if state.peak_level == "HIGH":
+            self.assertTrue(state.is_deescalating)
+
+    def test_interrupted_deescalation(self):
+        """De-escalation resets if a HIGH message interrupts."""
+        self.tracker.record(detect_crisis("I want to kill myself"))
+        for _ in range(3):
+            self.tracker.record(detect_crisis("Doing better"))
+        # Interrupt with another crisis
+        self.tracker.record(detect_crisis("I feel hopeless again"))
+        self.tracker.record(detect_crisis("Feeling okay now"))
+        state = self.tracker.state
+        # Should NOT be de-escalating yet (counter reset)
+        self.assertFalse(state.is_deescalating)
+
+
+class TestSessionModifier(unittest.TestCase):
+    """Test system prompt modifier generation."""
+
+    def setUp(self):
+        self.tracker = CrisisSessionTracker()
+
+    def test_no_modifier_for_single_message(self):
+        self.tracker.record(detect_crisis("Hello"))
+        self.assertEqual(self.tracker.get_session_modifier(), "")
+
+    def test_no_modifier_for_stable_session(self):
+        self.tracker.record(detect_crisis("Hello"))
+        self.tracker.record(detect_crisis("Good morning"))
+        self.assertEqual(self.tracker.get_session_modifier(), "")
+
+    def test_escalation_modifier(self):
+        """Escalating session should produce a modifier."""
+        self.tracker.record(detect_crisis("Hello"))
+        self.tracker.record(detect_crisis("I want to die"))
+        modifier = self.tracker.get_session_modifier()
+        if self.tracker.state.is_escalating:
+            self.assertIn("escalated", modifier.lower())
+            self.assertIn("NONE", modifier)
+            self.assertIn("CRITICAL", modifier)
+
+    def test_deescalation_modifier(self):
+        """De-escalating session should mention stabilizing."""
+        self.tracker.record(detect_crisis("I want to kill myself"))
+        for _ in range(5):
+            self.tracker.record(detect_crisis("I'm feeling okay"))
+        modifier = self.tracker.get_session_modifier()
+        if self.tracker.state.is_deescalating:
+            self.assertIn("stabilizing", modifier.lower())
+
+    def test_prior_crisis_modifier(self):
+        """Past crisis should be noted even without active escalation."""
+        self.tracker.record(detect_crisis("I want to die"))
+        self.tracker.record(detect_crisis("Feeling a bit better"))
+        modifier = self.tracker.get_session_modifier()
+        # Should note the prior CRITICAL
+        if modifier:
+            self.assertIn("CRITICAL", modifier)
+
+
+class TestUIHints(unittest.TestCase):
+    """Test UI hint generation."""
+
+    def setUp(self):
+        self.tracker = CrisisSessionTracker()
+
+    def test_ui_hints_structure(self):
+        self.tracker.record(detect_crisis("Hello"))
+        hints = self.tracker.get_ui_hints()
+        self.assertIn("session_escalating", hints)
+        self.assertIn("session_deescalating", hints)
+        self.assertIn("session_peak_level", hints)
+        self.assertIn("session_message_count", hints)
+
+    def test_ui_hints_escalation_warning(self):
+        """Escalating session should have warning hint."""
+        self.tracker.record(detect_crisis("Hello"))
+        self.tracker.record(detect_crisis("I want to die"))
+        hints = self.tracker.get_ui_hints()
+        if hints["session_escalating"]:
+            self.assertTrue(hints.get("escalation_warning"))
+            self.assertIn("suggested_action", hints)
+
+
+class TestCheckCrisisWithSession(unittest.TestCase):
+    """Test the convenience function combining detection + session tracking."""
+
+    def test_returns_combined_data(self):
+        tracker = CrisisSessionTracker()
+        result = check_crisis_with_session("I want to die", tracker)
+        self.assertIn("level", result)
+        self.assertIn("session", result)
+        self.assertIn("current_level", result["session"])
+        self.assertIn("peak_level", result["session"])
+        self.assertIn("modifier", result["session"])
+
+    def test_session_updates_across_calls(self):
+        tracker = CrisisSessionTracker()
+        check_crisis_with_session("Hello", tracker)
+        result = check_crisis_with_session("I want to die", tracker)
+        self.assertEqual(result["session"]["message_count"], 2)
+        self.assertEqual(result["session"]["peak_level"], "CRITICAL")
+
+
+class TestPrivacy(unittest.TestCase):
+    """Verify privacy-first design principles."""
+
+    def test_no_persistence_mechanism(self):
+        """Session tracker should have no database, file, or network calls."""
+        import inspect
+        source = inspect.getsource(CrisisSessionTracker)
+        # Should not import database, requests, or file I/O
+        forbidden = ["sqlite", "requests", "urllib", "open(", "httpx", "aiohttp"]
+        for word in forbidden:
+            self.assertNotIn(word, source.lower(),
+                f"Session tracker should not use {word} — privacy-first design")
+
+    def test_state_contained_in_memory(self):
+        """All state should be instance attributes, not module-level."""
+        tracker = CrisisSessionTracker()
+        tracker.record(detect_crisis("I want to die"))
+        # New tracker should have clean state (no global contamination)
+        fresh = CrisisSessionTracker()
+        self.assertEqual(fresh.state.current_level, "NONE")
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/test_unified_gateway.py

@@ -0,0 +1,19 @@
+from crisis.gateway import check_crisis_multimodal
+from crisis.session_tracker import CrisisSessionTracker
+
+
+def test_multimodal_gateway_uses_unified_score_for_988_ui(tmp_path):
+    tracker = CrisisSessionTracker()
+    result = check_crisis_multimodal(
+        "I want to kill myself tonight",
+        tracker=tracker,
+        voice_score=0.92,
+        image_score=0.6,
+        audit_log_path=tmp_path / "audit.jsonl",
+    )
+
+    assert result["unified"]["level"] == "CRITICAL"
+    assert result["ui"]["provide_988"] is True
+    assert result["ui"]["show_overlay"] is True
+    assert result["unified"]["modalities"]["voice"] == 0.92
+    assert result["unified"]["modalities"]["behavioral"] >= 0.0

tests/test_unified_scorer.py

@@ -0,0 +1,51 @@
+from pathlib import Path
+
+from unified_scorer import (
+    CrisisLevel,
+    UnifiedCrisisScorer,
+    UnifiedScoreAuditLog,
+    behavioral_score_from_session,
+)
+from crisis.session_tracker import SessionState
+
+
+def test_unified_scorer_renormalizes_available_modalities_and_escalates():
+    scorer = UnifiedCrisisScorer()
+    assessment = scorer.score(
+        text_score=1.0,
+        voice_score=0.8,
+        image_score=None,
+        behavioral_score=0.7,
+    )
+
+    assert assessment.level is CrisisLevel.CRITICAL
+    assert assessment.combined_score > 0.8
+    assert assessment.present_modalities == ["text", "voice", "behavioral"]
+
+
+def test_behavioral_score_rises_for_escalating_session_state():
+    session = SessionState(
+        current_level="HIGH",
+        peak_level="CRITICAL",
+        message_count=4,
+        level_history=["LOW", "MEDIUM", "HIGH", "CRITICAL"],
+        is_escalating=True,
+        is_deescalating=False,
+        escalation_rate=1.0,
+        consecutive_low_messages=0,
+    )
+
+    assert behavioral_score_from_session(session) >= 0.8
+
+
+def test_audit_log_persists_anonymized_score_entries(tmp_path):
+    log_path = tmp_path / "unified-score-audit.jsonl"
+    scorer = UnifiedCrisisScorer(audit_log=UnifiedScoreAuditLog(log_path))
+    scorer.score(text_score=0.75, voice_score=0.2, image_score=0.1, behavioral_score=0.6, source_text="I feel trapped and hopeless")
+
+    lines = log_path.read_text().strip().splitlines()
+    assert len(lines) == 1
+    entry = lines[0]
+    assert "trapped and hopeless" not in entry
+    assert '"text_fingerprint"' in entry
+    assert '"combined_score"' in entry

unified_scorer.py

@@ -0,0 +1,126 @@
+"""Unified multimodal crisis scoring for the-door."""
+
+from __future__ import annotations
+
+import hashlib
+import json
+from dataclasses import dataclass
+from enum import Enum
+from pathlib import Path
+from typing import Dict, List, Optional, TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from crisis.session_tracker import SessionState
+
+
+SCORE_BY_LEVEL = {"NONE": 0.0, "LOW": 0.25, "MEDIUM": 0.5, "HIGH": 0.75, "CRITICAL": 1.0}
+LEVEL_RANK = {"NONE": 0, "LOW": 1, "MEDIUM": 2, "HIGH": 3, "CRITICAL": 4}
+
+
+class CrisisLevel(Enum):
+    NONE = "NONE"
+    LOW = "LOW"
+    MEDIUM = "MEDIUM"
+    HIGH = "HIGH"
+    CRITICAL = "CRITICAL"
+
+
+DEFAULT_WEIGHTS: Dict[str, float] = {
+    "text": 0.4,
+    "voice": 0.25,
+    "behavioral": 0.2,
+    "image": 0.15,
+}
+
+
+@dataclass
+class UnifiedAssessment:
+    level: CrisisLevel
+    combined_score: float
+    weights: Dict[str, float]
+    modalities: Dict[str, Optional[float]]
+    present_modalities: List[str]
+
+
+class UnifiedScoreAuditLog:
+    def __init__(self, path: Path | str):
+        self.path = Path(path)
+
+    def record(self, assessment: UnifiedAssessment, source_text: str = "") -> None:
+        self.path.parent.mkdir(parents=True, exist_ok=True)
+        fingerprint = hashlib.sha256(source_text.encode("utf-8")).hexdigest()[:12] if source_text else None
+        payload = {
+            "level": assessment.level.value,
+            "combined_score": round(assessment.combined_score, 4),
+            "weights": assessment.weights,
+            "modalities": assessment.modalities,
+            "present_modalities": assessment.present_modalities,
+            "text_fingerprint": fingerprint,
+        }
+        with self.path.open("a", encoding="utf-8") as fh:
+            fh.write(json.dumps(payload, sort_keys=True) + "\n")
+
+
+class UnifiedCrisisScorer:
+    def __init__(self, weights: Optional[Dict[str, float]] = None, audit_log: Optional[UnifiedScoreAuditLog] = None):
+        self.weights = dict(DEFAULT_WEIGHTS)
+        if weights:
+            self.weights.update(weights)
+        self.audit_log = audit_log
+
+    def _normalize(self, modalities: Dict[str, Optional[float]]) -> Dict[str, float]:
+        present = [name for name, score in modalities.items() if score is not None]
+        if not present:
+            return {}
+        total = sum(self.weights[name] for name in present)
+        return {name: self.weights[name] / total for name in present}
+
+    def _level_for_score(self, score: float) -> CrisisLevel:
+        if score > 0.8:
+            return CrisisLevel.CRITICAL
+        if score > 0.6:
+            return CrisisLevel.HIGH
+        if score > 0.4:
+            return CrisisLevel.MEDIUM
+        if score > 0.0:
+            return CrisisLevel.LOW
+        return CrisisLevel.NONE
+
+    def score(
+        self,
+        *,
+        text_score: Optional[float],
+        voice_score: Optional[float] = None,
+        image_score: Optional[float] = None,
+        behavioral_score: Optional[float] = None,
+        source_text: str = "",
+    ) -> UnifiedAssessment:
+        modalities = {
+            "text": text_score,
+            "voice": voice_score,
+            "behavioral": behavioral_score,
+            "image": image_score,
+        }
+        normalized = self._normalize(modalities)
+        combined = 0.0
+        for name, weight in normalized.items():
+            combined += float(modalities[name]) * weight
+        assessment = UnifiedAssessment(
+            level=self._level_for_score(combined),
+            combined_score=combined,
+            weights=normalized,
+            modalities=modalities,
+            present_modalities=[name for name, score in modalities.items() if score is not None],
+        )
+        if self.audit_log:
+            self.audit_log.record(assessment, source_text=source_text)
+        return assessment
+
+
+def behavioral_score_from_session(session: 'SessionState') -> float:
+    current = SCORE_BY_LEVEL.get(session.current_level, 0.0)
+    peak_bonus = 0.1 if LEVEL_RANK.get(session.peak_level, 0) >= LEVEL_RANK["HIGH"] else 0.0
+    escalation_bonus = 0.15 if session.is_escalating else 0.0
+    rate_bonus = min(max(session.escalation_rate, 0.0), 1.0) * 0.1
+    deescalation_penalty = 0.15 if session.is_deescalating else 0.0
+    return max(0.0, min(1.0, current + peak_bonus + escalation_bonus + rate_bonus - deescalation_penalty))