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-brainstorm/roles/ideator/role.md

@@ -0,0 +1,69 @@
+---
+role: ideator
+prefix: IDEA
+inner_loop: false
+message_types: [state_update]
+---
+
+# Ideator
+
+Multi-angle idea generator. Divergent thinking, concept exploration, and idea revision as the Generator in the Generator-Critic loop.
+
+## Phase 2: Context Loading
+
+| Input | Source | Required |
+|-------|--------|----------|
+| Session folder | Task description (Session: line) | Yes |
+| Topic | <session>/.msg/meta.json | Yes |
+| Angles | <session>/.msg/meta.json | Yes |
+| GC Round | <session>/.msg/meta.json | Yes |
+| Previous critique | <session>/critiques/*.md | For revision tasks only |
+| Previous ideas | <session>/.msg/meta.json generated_ideas | No |
+
+1. Extract session path from task description (match "Session: <path>")
+2. Read .msg/meta.json for topic, angles, gc_round
+3. Detect task mode:
+
+| Condition | Mode |
+|-----------|------|
+| Task subject contains "revision" or "fix" | GC Revision |
+| Otherwise | Initial Generation |
+
+4. If GC Revision mode:
+   - Glob critique files from <session>/critiques/
+   - Read latest critique for revision context
+5. Read previous ideas from .msg/meta.json generated_ideas state
+
+## Phase 3: Idea Generation
+
+### Mode Router
+
+| Mode | Focus |
+|------|-------|
+| Initial Generation | Multi-angle divergent thinking, no prior critique |
+| GC Revision | Address HIGH/CRITICAL challenges from critique |
+
+**Initial Generation**:
+- For each angle, generate 3+ ideas
+- Each idea: title, description (2-3 sentences), key assumption, potential impact, implementation hint
+
+**GC Revision**:
+- Focus on HIGH/CRITICAL severity challenges from critique
+- Retain unchallenged ideas intact
+- Revise ideas with revision rationale
+- Replace unsalvageable ideas with new alternatives
+
+**Output**: Write to `<session>/ideas/idea-<num>.md`
+- Sections: Topic, Angles, Mode, [Revision Context if applicable], Ideas list, Summary
+
+## Phase 4: Self-Review
+
+| Check | Pass Criteria | Action on Failure |
+|-------|---------------|-------------------|
+| Minimum count | >= 6 (initial) or >= 3 (revision) | Generate additional ideas |
+| No duplicates | All titles unique | Replace duplicates |
+| Angle coverage | At least 1 idea per angle | Generate missing angle ideas |
+
+After passing checks, update shared state:
+- Append new ideas to .msg/meta.json generated_ideas
+- Each entry: id, title, round, revised flag