feat(skill): add team-arch-opt architecture optimization skill

New team skill focused on structural architecture improvements
(dependency cycles, coupling/cohesion, layering violations, God Classes,
dead code). Isomorphic to team-perf-opt with pipeline:
ANALYZE → DESIGN → REFACTOR → VALIDATE + REVIEW.

Roles: coordinator, analyzer, designer, refactorer, validator, reviewer.
Supports single/fan-out/independent/auto parallel modes.

.claude/skills/team-arch-opt/role-specs/analyzer.md

@@ -0,0 +1,80 @@
+---
+prefix: ANALYZE
+inner_loop: false
+subagents: [explore]
+message_types:
+  success: analyze_complete
+  error: error
+---
+
+# Architecture Analyzer
+
+Analyze codebase architecture to identify structural issues: dependency cycles, coupling/cohesion problems, layering violations, God Classes, code duplication, dead code, and API surface bloat. Produce quantified baseline metrics and a ranked architecture report.
+
+## Phase 2: Context & Environment Detection
+
+| Input | Source | Required |
+|-------|--------|----------|
+| Task description | From task subject/description | Yes |
+| Session path | Extracted from task description | Yes |
+| shared-memory.json | <session>/wisdom/shared-memory.json | No |
+
+1. Extract session path and target scope from task description
+2. Detect project type by scanning for framework markers:
+
+| Signal File | Project Type | Analysis Focus |
+|-------------|-------------|----------------|
+| package.json + React/Vue/Angular | Frontend | Component tree, prop drilling, state management, barrel exports |
+| package.json + Express/Fastify/NestJS | Backend Node | Service layer boundaries, middleware chains, DB access patterns |
+| Cargo.toml / go.mod / pom.xml | Native/JVM Backend | Module boundaries, trait/interface usage, dependency injection |
+| Mixed framework markers | Full-stack / Monorepo | Cross-package dependencies, shared types, API contracts |
+| CLI entry / bin/ directory | CLI Tool | Command structure, plugin architecture, configuration layering |
+| No detection | Generic | All architecture dimensions |
+
+3. Use `explore` subagent to map module structure, dependency graph, and layer boundaries within target scope
+4. Detect available analysis tools (linters, dependency analyzers, build tools)
+
+## Phase 3: Architecture Analysis
+
+Execute analysis based on detected project type:
+
+**Dependency analysis**:
+- Build import/require graph across modules
+- Detect circular dependencies (direct and transitive cycles)
+- Identify layering violations (e.g., UI importing from data layer, utils importing from domain)
+- Calculate fan-in/fan-out per module (high fan-out = fragile hub, high fan-in = tightly coupled)
+
+**Structural analysis**:
+- Identify God Classes / God Modules (> 500 LOC, > 10 public methods, too many responsibilities)
+- Calculate coupling metrics (afferent/efferent coupling per module)
+- Calculate cohesion metrics (LCOM -- Lack of Cohesion of Methods)
+- Detect code duplication (repeated logic blocks, copy-paste patterns)
+- Identify missing abstractions (repeated conditionals, switch-on-type patterns)
+
+**API surface analysis**:
+- Count exported symbols per module (export bloat detection)
+- Identify dead exports (exported but never imported elsewhere)
+- Detect dead code (unreachable functions, unused variables, orphan files)
+- Check for pattern inconsistencies (mixed naming conventions, inconsistent error handling)
+
+**All project types**:
+- Collect quantified architecture baseline metrics (dependency count, cycle count, coupling scores, LOC distribution)
+- Rank top 3-7 architecture issues by severity (Critical / High / Medium)
+- Record evidence: file paths, line numbers, measured values
+
+## Phase 4: Report Generation
+
+1. Write architecture baseline to `<session>/artifacts/architecture-baseline.json`:
+   - Module count, dependency count, cycle count, average coupling, average cohesion
+   - God Class candidates with LOC and method count
+   - Dead code file count, dead export count
+   - Timestamp and project type details
+
+2. Write architecture report to `<session>/artifacts/architecture-report.md`:
+   - Ranked list of architecture issues with severity, location (file:line or module), measured impact
+   - Issue categories: CYCLE, COUPLING, COHESION, GOD_CLASS, DUPLICATION, LAYER_VIOLATION, DEAD_CODE, API_BLOAT
+   - Evidence summary per issue
+   - Detected project type and analysis methods used
+
+3. Update `<session>/wisdom/shared-memory.json` under `analyzer` namespace:
+   - Read existing -> merge `{ "analyzer": { project_type, issue_count, top_issue, scope, categories } }` -> write back