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-iterdev/specs/pipelines.md

@@ -0,0 +1,94 @@
+# IterDev Pipeline Definitions
+
+## Three-Pipeline Architecture
+
+### Patch Pipeline (2 beats, serial)
+
+```
+DEV-001 -> VERIFY-001
+[developer]  [tester]
+```
+
+### Sprint Pipeline (4 beats, with parallel window)
+
+```
+DESIGN-001 -> DEV-001 -> [VERIFY-001 + REVIEW-001] (parallel)
+[architect]   [developer]  [tester]       [reviewer]
+```
+
+### Multi-Sprint Pipeline (N beats, iterative)
+
+```
+Sprint 1: DESIGN-001 -> DEV-001 -> DEV-002(incremental) -> VERIFY-001 -> DEV-fix -> REVIEW-001
+Sprint 2: DESIGN-002(refined) -> DEV-003 -> VERIFY-002 -> REVIEW-002
+...
+```
+
+## Generator-Critic Loop (developer <-> reviewer)
+
+```
+DEV -> REVIEW -> (if review.critical_count > 0 || review.score < 7)
+              -> DEV-fix -> REVIEW-2 -> (if still issues) -> DEV-fix-2 -> REVIEW-3
+              -> (max 3 rounds, then accept with warning)
+```
+
+## Pipeline Selection Logic
+
+| Signal | Score |
+|--------|-------|
+| Changed files > 10 | +3 |
+| Changed files 3-10 | +2 |
+| Structural change | +3 |
+| Cross-cutting concern | +2 |
+| Simple fix | -2 |
+
+| Score | Pipeline |
+|-------|----------|
+| >= 5 | multi-sprint |
+| 2-4 | sprint |
+| 0-1 | patch |
+
+## Task Metadata Registry
+
+| Task ID | Role | Pipeline | Dependencies | Description |
+|---------|------|----------|-------------|-------------|
+| DESIGN-001 | architect | sprint/multi | (none) | Technical design and task breakdown |
+| DEV-001 | developer | all | DESIGN-001 (sprint/multi) or (none for patch) | Code implementation |
+| DEV-002 | developer | multi | DEV-001 | Incremental implementation |
+| DEV-fix | developer | sprint/multi | REVIEW-* (GC loop trigger) | Fix issues from review |
+| VERIFY-001 | tester | all | DEV-001 (or last DEV) | Test execution and fix cycles |
+| REVIEW-001 | reviewer | sprint/multi | DEV-001 (or last DEV) | Code review and quality scoring |
+
+## Checkpoints
+
+| Trigger Condition | Location | Behavior |
+|-------------------|----------|----------|
+| GC loop exceeds max rounds | After REVIEW-3 | Stop iteration, accept with warning, record in wisdom |
+| Sprint transition | End of Sprint N | Pause, retrospective, user confirms `resume` for Sprint N+1 |
+| Pipeline stall | No ready + no running tasks | Check missing tasks, report blockedBy chain to user |
+
+## Multi-Sprint Dynamic Downgrade
+
+If Sprint N metrics are strong (velocity >= expected, review avg >= 8), coordinator may downgrade Sprint N+1 from multi-sprint to sprint pipeline for efficiency.
+
+## Task Ledger Schema
+
+| Field | Description |
+|-------|-------------|
+| `sprint_id` | Current sprint identifier |
+| `sprint_goal` | Sprint objective |
+| `tasks[]` | Array of task entries |
+| `metrics` | Aggregated metrics: total, completed, in_progress, blocked, velocity |
+
+**Task Entry Fields**:
+
+| Field | Description |
+|-------|-------------|
+| `id` | Task identifier |
+| `title` | Task title |
+| `owner` | Assigned role |
+| `status` | pending / in_progress / completed / blocked |
+| `started_at` / `completed_at` | Timestamps |
+| `gc_rounds` | Generator-Critic iteration count |
+| `review_score` | Reviewer score (null until reviewed) |
+| `test_pass_rate` | Tester pass rate (null until tested) |