docs(phase-2): add research and validation strategy

.planning/phases/02-planning-threads/02-VALIDATION.md

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+---
+phase: 2
+slug: planning-threads
+status: draft
+nyquist_compliant: false
+wave_0_complete: false
+created: 2026-03-15
+---
+
+# Phase 2 — Validation Strategy
+
+> Per-phase validation contract for feedback sampling during execution.
+
+---
+
+## Test Infrastructure
+
+| Property | Value |
+|----------|-------|
+| **Framework** | Bun test runner (built-in, Jest-compatible API) |
+| **Config file** | None — Bun detects test files automatically |
+| **Quick run command** | `bun test --bail` |
+| **Full suite command** | `bun test` |
+| **Estimated runtime** | ~5 seconds (Phase 1 + Phase 2 tests) |
+
+---
+
+## Sampling Rate
+
+- **After every task commit:** Run `bun test --bail`
+- **After every plan wave:** Run `bun test`
+- **Before `/gsd:verify-work`:** Full suite must be green
+- **Max feedback latency:** 5 seconds
+
+---
+
+## Per-Task Verification Map
+
+| Task ID | Plan | Wave | Requirement | Test Type | Automated Command | File Exists | Status |
+|---------|------|------|-------------|-----------|-------------------|-------------|--------|
+| 02-01-01 | 01 | 1 | THRD-01 | unit | `bun test tests/services/thread.service.test.ts -t "create"` | ❌ W0 | ⬜ pending |
+| 02-01-02 | 01 | 1 | THRD-01 | integration | `bun test tests/routes/threads.test.ts -t "create"` | ❌ W0 | ⬜ pending |
+| 02-01-03 | 01 | 1 | THRD-02 | unit | `bun test tests/services/thread.service.test.ts -t "candidate"` | ❌ W0 | ⬜ pending |
+| 02-01-04 | 01 | 1 | THRD-02 | integration | `bun test tests/routes/threads.test.ts -t "candidate"` | ❌ W0 | ⬜ pending |
+| 02-01-05 | 01 | 1 | THRD-03 | unit | `bun test tests/services/thread.service.test.ts -t "update\|delete"` | ❌ W0 | ⬜ pending |
+| 02-01-06 | 01 | 1 | THRD-04 | unit | `bun test tests/services/thread.service.test.ts -t "resolve"` | ❌ W0 | ⬜ pending |
+| 02-01-07 | 01 | 1 | THRD-04 | integration | `bun test tests/routes/threads.test.ts -t "resolve"` | ❌ W0 | ⬜ pending |
+| 02-01-08 | 01 | 1 | THRD-04 | unit | `bun test tests/services/thread.service.test.ts -t "list"` | ❌ W0 | ⬜ pending |
+
+*Status: ⬜ pending · ✅ green · ❌ red · ⚠️ flaky*
+
+---
+
+## Wave 0 Requirements
+
+- [ ] `tests/services/thread.service.test.ts` — stubs for THRD-01, THRD-02, THRD-03, THRD-04
+- [ ] `tests/routes/threads.test.ts` — integration tests for thread API endpoints
+- [ ] `tests/helpers/db.ts` — MODIFY: add threads + thread_candidates table creation to in-memory setup
+
+---
+
+## Manual-Only Verifications
+
+| Behavior | Requirement | Why Manual | Test Instructions |
+|----------|-------------|------------|-------------------|
+| Tab switching between "My Gear" and "Planning" | THRD-01 | Navigation UX | Click tabs, verify correct content shown, URL updates |
+| Thread card grid layout and tag chips | THRD-01 | Visual layout | View thread list, verify cards show name, candidate count, price range |
+| Candidate card grid within thread | THRD-02 | Visual layout | Open thread, verify candidates display as cards |
+| Slide-out panel for candidate add/edit | THRD-02/03 | UI interaction | Add/edit candidate, verify panel slides from right |
+| Resolution confirmation dialog | THRD-04 | UI interaction | Click resolve, verify confirmation dialog appears |
+| Resolved thread hidden from active list | THRD-04 | UI state | Resolve thread, verify it disappears, toggle shows archived |
+
+---
+
+## Validation Sign-Off
+
+- [ ] All tasks have `<automated>` verify or Wave 0 dependencies
+- [ ] Sampling continuity: no 3 consecutive tasks without automated verify
+- [ ] Wave 0 covers all MISSING references
+- [ ] No watch-mode flags
+- [ ] Feedback latency < 5s
+- [ ] `nyquist_compliant: true` set in frontmatter
+
+**Approval:** pending