Add v0.5.0: CCGS Skill Testing Framework, skill-improve, 4 new skills, director gate path fixes

- Add CCGS Skill Testing Framework: self-contained QA layer with 72 skill specs,
  49 agent specs, catalog.yaml, quality-rubric.md, templates, README, CLAUDE.md
- Add /skill-improve: test-fix-retest loop covering static + category checks
- Add 4 missing skills: /art-bible, /asset-spec, /day-one-patch, /security-audit
- Add /skill-test category mode (Phase 2D) with quality rubric evaluation
- Extend /skill-test audit to cover agent specs alongside skill specs
- Update all skill-test and skill-improve path refs to CCGS Skill Testing Framework/
- Remove stale tests/skills/ directory (superseded by CCGS Skill Testing Framework)
- Add director gate intensity modes (full/lean/solo) to gate-check and related skills

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

.claude/skills/quick-design/SKILL.md

@@ -4,7 +4,6 @@ description: "Lightweight design spec for small changes — tuning adjustments,
 argument-hint: "[brief description of the change]"
 user-invocable: true
 allowed-tools: Read, Glob, Grep, Write, Edit
-context: fork
 ---
 
 # Quick Design
@@ -55,8 +54,10 @@ Before drafting anything, read the relevant context:
 
 - Search `design/gdd/` for the GDD most relevant to this change. Read the
   sections that this change would affect.
-- Read `design/gdd/systems-index.md` to understand where this system sits in
-  the dependency graph and what tier it belongs to.
+- Check whether `design/gdd/systems-index.md` exists. If it does, read it to
+  understand where this system sits in the dependency graph and what tier it
+  belongs to. If it does not exist, note "No systems index found — skipping
+  dependency tier check." and continue.
 - Check `design/quick-specs/` for any prior quick specs that touched this
   system — avoid contradicting them.
 - If this is a Tuning change, also check `assets/data/` for the data file that