feat: smart-suggest ROI script + hook tuning + guide updates (Mar 16)

- Add examples/scripts/smart-suggest-roi.py: stdlib-only analyzer correlating
  suggestion log with session JSONL files to measure command acceptance rate.
  4 acceptance signals, tier breakdown, daily trend, --json/--since/--no-sessions CLI.
- Tune Aristote smart-suggest hook: tighten 5 over-firing triggers (/tech:commit,
  /tech:sonarqube, /tech:dupes, /check-conventions a11y, /tech:worktree)
- Guide: identity re-injection hook, context engineering maturity grid, code review
  workflow, 1M context window GA update, Spring Break promo, security audit patterns
- Resource evaluations: Nick Tune hooks (3/5), VicKayro security audit (2/5),
  Karl Mazier CLAUDE.md templates, Paul Rayner ContextFlow, Siddhant agent trace,
  Andrew Yng context hub, JP Caparas 1M context window

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

machine-readable/reference.yaml

@@ -113,6 +113,9 @@ deep_dive:
   changelog_fragments_ci: "guide/workflows/changelog-fragments.md:169"  # Independent CI migration check job
   # Smart-Suggest Hook
   smart_suggest_hook: "examples/hooks/bash/smart-suggest.sh"  # UserPromptSubmit behavioral coach, 3-tier priority, ROI logging
+  # Identity Re-injection After Compaction (Nick Tune pattern, Feb 2026)
+  identity_reinjection_hook: "guide/ultimate-guide.md:10171"  # UserPromptSubmit guard: re-injects agent identity lost after context compaction
+  identity_reinjection_example: "examples/hooks/bash/identity-reinjection.sh"  # Checks last assistant message for identity marker, injects additionalContext if missing
   # Template Installation
   install_templates_script: "scripts/install-templates.sh"
   # Session management