docs: CLAUDE.md 작업 프로토콜 추가 및 수정 계획 작성

- CLAUDE.md: Claude-Gemini 교차 토론 프로토콜 추가
- CLAUDE.md: 존재하지 않는 디렉토리 3개 제거
- analysis/fix-plan: 4 Phase 수정 계획 (Claude-Gemini 합의)
- .claude/agents/: dev 리뷰 에이전트 9개 복사
- .claude/skills/: 프로젝트 스킬 4개 복사

.claude/skills/project-diff-review.md

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+# Project Diff Review Skill
+
+## Trigger
+`/project-diff [absolute_path] [commit_range or PR#]` or "변경분 리뷰", "PR 리뷰"
+
+## Description
+Targeted review of a specific commit range or PR. Only analyzes changed files against the existing audit baseline. Much faster than full audit.
+
+## Input
+- Absolute project path
+- Commit range (e.g., `HEAD~3..HEAD`) or PR number
+- Optional: previous audit report for delta comparison
+
+## Execution Workflow
+
+### Step 1: Identify Changes
+- `git diff --name-only [range]` to get changed files
+- Categorize changes: new files, modified files, deleted files
+
+### Step 2: Targeted Analysis (only relevant agents)
+- Changed source files → `dev-code-quality`, `dev-architecture`
+- Changed security-related files → `dev-security`
+- Changed package files → `dev-supply-chain`
+- Changed test files → `dev-test-coverage`
+- Changed docs → `dev-docs-sync`
+- Changed CI/config → `dev-devops`
+- Performance-sensitive changes → `dev-performance`
+
+### Step 3: Impact Assessment
+- Does this change improve or degrade each dimension?
+- New technical debt introduced?
+- Existing issues fixed?
+
+## Output Format
+Final deliverable in **Korean (한국어)**.
+
+```markdown
+# [Project Name] Diff Review — [commit range]
+
+## Changes Summary
+- Files changed: [count]
+- Lines added: [count]
+- Lines removed: [count]
+
+## Review Results
+| File | Agent | Finding | Severity |
+|------|-------|---------|----------|
+| | | | |
+
+## Health Score Impact
+| Dimension | Before | After | Delta |
+|-----------|--------|-------|-------|
+
+## Approval Status
+- [ ] Security: PASS/FAIL
+- [ ] Architecture: PASS/FAIL
+- [ ] Tests: PASS/FAIL
+- [ ] Docs updated: PASS/FAIL
+
+## Verdict: [✅ APPROVE / ⚠️ REQUEST CHANGES / 🔴 BLOCK]
+```
+
+## Brutal Analysis Principles
+- A diff that adds code without tests should be flagged
+- A diff that changes API without updating docs should be flagged
+- Security regressions = automatic BLOCK
+
+## Claude-Gemini Cross-Debate Protocol
+For diff reviews, Claude analyzes → Gemini reviews the same diff → consensus on verdict.