quill: add draft-evidence-check skill with verify script

wizard-work/quill/draft-evidence-check/SKILL.md

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+---
+name: draft-evidence-check
+description: Verify every draft claim has evidence before declaring done.
+lane: Draft
+---
+
+# Draft Evidence Check
+
+Before any draft is declared finished, run this checklist. A claim without evidence is a stub.
+
+## When to Use
+
+- You just finished a draft artifact (file, report, skill, brief).
+- The user asked for a "finished" or "final" version.
+- You are about to commit or ship text that contains assertions.
+
+## Protocol
+
+1. Extract every factual claim from the draft.
+2. For each claim, mark one of:
+   - `measured`: backed by real tool output, file contents, or live data.
+   - `cited`: backed by a quoted source with a path or URL.
+   - `claimed`: asserted without supporting evidence in the draft.
+3. If any claim is marked `claimed`, stop. Add the evidence or downgrade the claim to a hypothesis.
+4. Run the CHECK command (a single shell command whose exit code is the verdict).
+
+## Verification
+
+- All claims are `measured` or `cited`.
+- Zero `claimed` items remain.
+- The draft contains an explicit `VERDICT:` line.
+- The draft contains a `CHECK:` line with a bare shell command (no `|| true`, no `; echo ...`).
+
+## Example
+
+Bad:
+```
+The system is healthy. VERDICT: correct
+```
+
+Good:
+```
+`terminal(command="systemctl is-active nginx")` returned `active`.
+VERDICT: nginx is running on this host.
+CHECK: systemctl is-active nginx
+```
+
+## Pitfalls
+
+- Do not substitute plausible-looking output for missing evidence. If a tool call failed, say so and stop.
+- Do not add fallback arms (`|| true`, `; exit 0`) to the CHECK line. The exit code must be the verdict.
+- "The executor said done" is not "a test passed."

wizard-work/quill/draft-evidence-check/sample-draft.md

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+# Sample Draft: Server Health Check
+
+Claim: nginx is not running on this host.
+Evidence: `terminal(command="systemctl is-active nginx")` returned `inactive` on 2026-10-26.
+Status: measured.
+
+Claim: Disk usage on /root is at 99%.
+Evidence: `terminal(command="df -h /root")` returned `99%` used on 2026-10-26.
+Status: measured.
+
+Claim: This draft meets the evidence-check protocol.
+Evidence: verify.py returned PASS with exit code 0.
+Status: measured.
+
+VERDICT: all claims are measured; draft is evidence-backed.
+CHECK: python3 /root/troupe-standup/wizard-work/quill/draft-evidence-check/verify.py

wizard-work/quill/draft-evidence-check/verify.py

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+#!/usr/bin/env python3
+"""Verify draft-evidence-check skill and a sample draft."""
+import re
+import sys
+import pathlib
+
+def check_skill(path):
+    content = pathlib.Path(path).read_text()
+    errors = []
+    if not content.startswith("---"):
+        errors.append("SKILL.md missing leading ---")
+    if "name: draft-evidence-check" not in content:
+        errors.append("Missing name field")
+    if "description:" not in content:
+        errors.append("Missing description field")
+    if "## When to Use" not in content:
+        errors.append("Missing 'When to Use' section")
+    if "## Protocol" not in content:
+        errors.append("Missing 'Protocol' section")
+    if "## Verification" not in content:
+        errors.append("Missing 'Verification' section")
+    if "## Pitfalls" not in content:
+        errors.append("Missing 'Pitfalls' section")
+    return errors
+
+def check_draft(path):
+    content = pathlib.Path(path).read_text()
+    errors = []
+    if "VERDICT:" not in content:
+        errors.append("Draft missing VERDICT: line")
+    if "CHECK:" not in content:
+        errors.append("Draft missing CHECK: line")
+    # Extract CHECK line
+    m = re.search(r'^CHECK:\s*(.+)$', content, re.MULTILINE)
+    if not m:
+        errors.append("Could not parse CHECK: line")
+    else:
+        cmd = m.group(1).strip()
+        if "|| true" in cmd or "|| echo" in cmd or "|| exit" in cmd:
+            errors.append("CHECK: line contains forbidden fallback arm")
+        if ";" in cmd and not cmd.startswith("#"):
+            errors.append("CHECK: line contains semicolon (not a bare command)")
+    return errors
+
+if __name__ == "__main__":
+    skill_path = pathlib.Path(__file__).parent / "SKILL.md"
+    draft_path = pathlib.Path(__file__).parent / "sample-draft.md"
+    
+    skill_errors = check_skill(skill_path)
+    draft_errors = check_draft(draft_path)
+    
+    all_errors = skill_errors + draft_errors
+    if all_errors:
+        print("FAIL:")
+        for e in all_errors:
+            print(f"  - {e}")
+        sys.exit(1)
+    else:
+        print("PASS: skill and draft meet evidence-check protocol")
+        sys.exit(0)