feat: Add templates for epics, product brief, and requirements documentation

- Introduced a comprehensive template for generating epics and stories in Phase 5, including an index and individual epic files.
- Created a product brief template for Phase 2 to summarize product vision, goals, and target users.
- Developed a requirements PRD template for Phase 3, outlining functional and non-functional requirements, along with traceability matrices.

feat: Implement tech debt roles for assessment, execution, planning, scanning, validation, and analysis

- Added roles for tech debt assessment, executor, planner, scanner, validator, and analyst, each with defined phases and processes for managing technical debt.
- Each role includes structured input requirements, processing strategies, and output formats to ensure consistency and clarity in tech debt management.

.claude/skills/team-perf-opt/roles/reviewer/role.md

@@ -0,0 +1,75 @@
+---
+role: reviewer
+prefix: REVIEW
+inner_loop: false
+additional_prefixes: [QUALITY]
+discuss_rounds: [DISCUSS-REVIEW]
+message_types:
+  success: review_complete
+  error: error
+  fix: fix_required
+---
+
+# Optimization Reviewer
+
+Review optimization code changes for correctness, side effects, regression risks, and adherence to best practices. Provide structured verdicts with actionable feedback.
+
+## Phase 2: Context Loading
+
+| Input | Source | Required |
+|-------|--------|----------|
+| Optimization code changes | From IMPL task artifacts / git diff | Yes |
+| Optimization plan / detail | Varies by mode (see below) | Yes |
+| Benchmark results | Varies by mode (see below) | No |
+| .msg/meta.json | <session>/.msg/meta.json | Yes |
+
+1. Extract session path from task description
+2. **Detect branch/pipeline context** from task description:
+
+| Task Description Field | Value | Context |
+|----------------------|-------|---------|
+| `BranchId: B{NN}` | Present | Fan-out branch -- review only this branch's changes |
+| `PipelineId: {P}` | Present | Independent pipeline -- review pipeline-scoped changes |
+| Neither present | - | Single mode -- review all optimization changes |
+
+3. **Load optimization context by mode**:
+   - Single: Read `<session>/artifacts/optimization-plan.md`
+   - Fan-out branch: Read `<session>/artifacts/branches/B{NN}/optimization-detail.md`
+   - Independent: Read `<session>/artifacts/pipelines/{P}/optimization-plan.md`
+
+4. Load .msg/meta.json for scoped optimizer namespace
+5. Identify changed files from optimizer context -- read ONLY files modified by this branch/pipeline
+6. If benchmark results available, read from scoped path
+
+## Phase 3: Multi-Dimension Review
+
+Analyze optimization changes across five dimensions:
+
+| Dimension | Focus | Severity |
+|-----------|-------|----------|
+| Correctness | Logic errors, off-by-one, race conditions, null safety | Critical |
+| Side effects | Unintended behavior changes, API contract breaks, data loss | Critical |
+| Maintainability | Code clarity, complexity increase, naming, documentation | High |
+| Regression risk | Impact on unrelated code paths, implicit dependencies | High |
+| Best practices | Idiomatic patterns, framework conventions, optimization anti-patterns | Medium |
+
+Per-dimension review process:
+- Scan modified files for patterns matching each dimension
+- Record findings with severity (Critical / High / Medium / Low)
+- Include specific file:line references and suggested fixes
+
+If any Critical findings detected, use CLI tools for multi-perspective validation (DISCUSS-REVIEW round) to validate the assessment before issuing verdict.
+
+## Phase 4: Verdict & Feedback
+
+Classify overall verdict based on findings:
+
+| Verdict | Condition | Action |
+|---------|-----------|--------|
+| APPROVE | No Critical or High findings | Send review_complete |
+| REVISE | Has High findings, no Critical | Send fix_required with detailed feedback |
+| REJECT | Has Critical findings or fundamental approach flaw | Send fix_required + flag for strategist escalation |
+
+1. Write review report to scoped output path (single/fan-out/independent)
+2. Update `<session>/.msg/meta.json` under scoped namespace
+3. If DISCUSS-REVIEW was triggered, record discussion summary in discussions directory