feat: comprehensive pipeline skill upgrades from PAI learnings

- reflect: enforce-before-adding pattern gate, proactive synthesis step,
  improvements.md triage, debrief must list every file modified
- housekeeping: domain INDEX.md rebuild step, briefing bridge SSOT rule
  and richer section format with compression rules
- foresight: cruising velocity classification, non-obvious rule,
  anti-patterns section, scenario candidate format in nudge output,
  thread current-state in memory reads
- scenario: full rewrite with body template (Decision Point, Dependencies,
  Branches, Timeline Overlay, Contingency Map, Retrospective), anti-patterns,
  trigger threshold, related-threads frontmatter
- evolve: route content issues step, scorecard generation, architecture-only
  constraint on Next Run Priorities
- history: simple vs deep triage note
- CLAUDE.md: structured action items format, briefing-bridge and
  foresight-nudge in file edit table

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/commands/housekeeping.md

@@ -102,7 +102,9 @@ Rules:
 
 ## 7. Write Briefing Bridge
 
-Write key findings to `memory/cog-meta/briefing-bridge.md` so foresight can pick them up:
+Write key findings to `memory/cog-meta/briefing-bridge.md` so foresight can pick them up. Overwrite the file each run.
+
+**SSOT rule**: Every line in the bridge must include a `[[source]]` link to its canonical file. The bridge summarizes and links — it NEVER introduces original facts.
 
 ```markdown
 # Briefing Bridge
@@ -111,18 +113,19 @@ Write key findings to `memory/cog-meta/briefing-bridge.md` so foresight can pick
 
 ## Stale Items (>2 weeks)
 - <item> — <age> — suggested action: <action>
+- **Compression rule**: Items stale >4 weeks — group by domain as a single line
 
 ## Birthday Prep
-- <name> birthday in <N> days — interests: <from entities>
+- <name> birthday in <N> days — interests: <from entities> — gift ideas: <suggestions>
 
 ## Dormant Domains
-- <domain> — last activity: <date>
+- <domain> — last activity: <date> — recommendation: <shelf/reactivate/shut down>
 
 ## Health Escalation
-- <item> — open <N> months
+- <item> — open <N> months — urgency: <high/medium>
 ```
 
-Only include sections that have content.
+Only include sections that have content. Empty sections should be omitted.
 
 ## 8. L0 Header Maintenance
 
@@ -132,7 +135,32 @@ Check all active memory files for missing `<!-- L0: ... -->` headers. If a file
 
 L0 headers are the first tier of the retrieval protocol — they let any skill scan what a file contains before deciding to read it.
 
-## 9. Compose Debrief
+## 9. Rebuild Domain Indexes
+
+Regenerate `INDEX.md` for each domain directory. These files power the memory router — the system prompt only shows a light domain table; the model reads INDEX.md on demand to find specific files.
+
+**For each domain** (scan `memory/` for directories, skip `glacier/`):
+1. List all `.md` files in the domain (exclude `INDEX.md`, `hot-memory.md`, and empty files)
+2. Extract the L0 summary from each file (same logic as step 8)
+3. Count total files
+4. Write `memory/{domain}/INDEX.md`:
+
+```markdown
+# {Domain} Index
+<!-- L0: {domain summary} — {N} files -->
+<!-- Auto-generated by housekeeping. Do not edit. -->
+<!-- Last updated: YYYY-MM-DD -->
+
+- **{filename}** — {L0 summary}
+- **{filename}** — {L0 summary}
+...
+```
+
+- Sort entries alphabetically by filename
+- Domain summary: use the `label` from `memory/domains.yml` for the matching domain
+- If a file has no L0, list it as just `**{filename}**` (no summary)
+
+## 10. Compose Debrief
 
 Summarize everything done:
 - What was archived/pruned