feat: implement new claude skills and workflow

.claude/skills/planner/SKILL.md

@@ -0,0 +1,59 @@
+---
+name: planner
+description: Interactive planning and execution for complex tasks. Use when user asks to use or invoke planner skill.
+---
+
+# Planner Skill
+
+Two-phase workflow: **planning** (create plans) and **execution** (implement
+plans).
+
+## Invocation Routing
+
+| User Intent                                 | Script      | Invocation                                                                         |
+| ------------------------------------------- | ----------- | ---------------------------------------------------------------------------------- |
+| "plan", "design", "architect", "break down" | planner.py  | `python3 scripts/planner.py --step-number 1 --total-steps 4 --thoughts "..."`      |
+| "review plan" (after plan written)          | planner.py  | `python3 scripts/planner.py --phase review --step-number 1 --total-steps 2 ...`    |
+| "execute", "implement", "run plan"          | executor.py | `python3 scripts/executor.py --plan-file PATH --step-number 1 --total-steps 7 ...` |
+
+Scripts inject step-specific guidance via JIT prompt injection. Invoke the
+script and follow its REQUIRED ACTIONS output.
+
+## When to Use
+
+Use when task has:
+
+- Multiple milestones with dependencies
+- Architectural decisions requiring documentation
+- Complexity benefiting from forced reflection pauses
+
+Skip when task is:
+
+- Single-step with obvious implementation
+- Quick fix or minor change
+- Already well-specified by user
+
+## Resources
+
+| Resource                              | Contents                                   | Read When                                       |
+| ------------------------------------- | ------------------------------------------ | ----------------------------------------------- |
+| `resources/diff-format.md`            | Unified diff specification for plans       | Writing code changes in milestones              |
+| `resources/temporal-contamination.md` | Comment hygiene detection heuristics       | Writing comments in code snippets               |
+| `resources/default-conventions.md`    | Priority hierarchy, structural conventions | Making decisions without explicit user guidance |
+| `resources/plan-format.md`            | Plan template structure                    | Completing planning phase (injected by script)  |
+
+**Resource loading rule**: Scripts will prompt you to read specific resources at
+decision points. When prompted, read the full resource before proceeding.
+
+## Workflow Summary
+
+**Planning phase**: Steps 1-N explore context, evaluate approaches, refine
+milestones. Final step writes plan to file. Review phase (TW scrub -> QR
+validation) follows.
+
+**Execution phase**: 7 steps -- analyze plan, reconcile existing code, delegate
+milestones to agents, QR validation, issue resolution, documentation,
+retrospective.
+
+All procedural details are injected by the scripts. Invoke the appropriate
+script and follow its output.