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/history.md

@@ -1,4 +1,4 @@
-Use this skill for deep memory search and recall. Trigger if the user says "what did I say about...", "when did we discuss...", "find that conversation about...", "history of...", or asks about past information that needs multi-file search.
+Use this skill for deep memory search and recall. Trigger if the user says "what did I say about...", "when did we discuss...", "find that conversation about...", "history of...", or asks about past information that needs multi-file search. For simple date/keyword lookups, a quick Grep suffices — this skill is for when you need to piece together a narrative from multiple entries.
 
 ## Domain