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.md

@@ -124,7 +124,7 @@ The `/reflect` skill reads recent session transcripts to review interactions, ca
 2. **Write immediately**: Don't wait to save something worth remembering
 3. **Observations are append-only**: `- YYYY-MM-DD [tags]: <observation>` — never edit past entries
    - Tags: `health`, `habits`, `family`, `milestone`, `work`, `insight`, `regression`, `philosophy`, `mental-health`
-4. **Action items**: `- [ ] task (added YYYY-MM-DD)` / `- [x] task (done YYYY-MM-DD)`
+4. **Action items**: `- [ ] task | due:YYYY-MM-DD | pri:critical/high/med/low | domain:tag | added:YYYY-MM-DD` / `- [x] task (done YYYY-MM-DD)`. Fields after task are optional — use what's relevant. `pri:` defaults to medium if omitted.
 5. **Entities**: 3-line compact registry format. Each entry: `### Name (relationship)` / pipe-separated key facts / `status: active|inactive | last: YYYY-MM-DD | → [[link]]`. Max 3 content lines per entry. Heavy entries promoted to detail thread files — entity stub links to thread via `→ [[link]]`. Cross-domain entities: canonical entry in primary domain, pointer in secondary (e.g. `see [[work/acme/entities#Jane]]` in personal). **Temporal validity**: When a fact changes, mark old value as superseded with date. `last:` dates updated by reflect from journal/session scans. Entities inactive 6+ months → housekeeping moves to glacier.
 6. **Hot memory <50 lines**: Prune aggressively, move detail to observations
 7. **Self-improvement**: After notable interactions, append to `cog-meta/self-observations.md`. Periodically distill patterns into `cog-meta/patterns.md`
@@ -186,6 +186,8 @@ When responding to any query:
 | `link-index.md`                 | Auto-generated by housekeeping — do not edit manually |
 | `cog-meta/scenario-calibration.md` | Updated by /reflect — scenario accuracy tracking   |
 | `cog-meta/scenarios/*.md`       | Created by /scenario, reviewed by /reflect             |
+| `cog-meta/briefing-bridge.md`   | Auto-generated by housekeeping — consumed by foresight |
+| `cog-meta/foresight-nudge.md`   | Auto-generated by foresight — one nudge per run        |
 | `glacier/index.md`              | Auto-generated by housekeeping — do not edit manually |
 
 ### Glacier Archival