feat(pipeline): add Unix toolbox orientation to pipeline skills

- Add Orientation sections to housekeeping, reflect, evolve with shell
  commands (find -mtime, grep -c, git diff, wc -c) for efficient scoping
- Update CLAUDE.md memory retrieval to use domain-scoped L0 grep

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

CLAUDE.md

@@ -156,7 +156,7 @@ The `/reflect` skill reads recent session transcripts to review interactions, ca
 When responding to any query:
 
 1. **Identify domain** — match query to a domain via file structure knowledge
-2. **L0 scan if uncertain** — if multiple files could be relevant, grep L0 headers in the domain directory before opening files
+2. **L0 scan** — once you know the domain, run `grep -rn "<!-- L0:" memory/{domain}/` to get all file summaries in one call. This replaces reading INDEX.md — faster and fewer tokens. Use this to pick the right file(s) before opening anything.
 3. **Select files by query type:**
    - Schedule, tasks → action-items.md + calendar.md
    - Person, "who is" → entities.md