docs(phase-09): add research and validation strategy

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.planning/phases/09-weight-classification-and-visualization/09-VALIDATION.md

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+---
+phase: 9
+slug: weight-classification-and-visualization
+status: draft
+nyquist_compliant: false
+wave_0_complete: false
+created: 2026-03-16
+---
+
+# Phase 9 — Validation Strategy
+
+> Per-phase validation contract for feedback sampling during execution.
+
+---
+
+## Test Infrastructure
+
+| Property | Value |
+|----------|-------|
+| **Framework** | Bun test runner |
+| **Config file** | none — existing infrastructure |
+| **Quick run command** | `bun test` |
+| **Full suite command** | `bun test` |
+| **Estimated runtime** | ~5 seconds |
+
+---
+
+## Sampling Rate
+
+- **After every task commit:** Run `bun test`
+- **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 |
+|---------|------|------|-------------|-----------|-------------------|-------------|--------|
+| 09-01-01 | 01 | 1 | CLAS-01, CLAS-04 | unit | `bun test tests/services/setup.service.test.ts` | ❌ W0 | ⬜ pending |
+| 09-01-02 | 01 | 1 | CLAS-03 | unit | `bun test tests/services/setup.service.test.ts` | ❌ W0 | ⬜ pending |
+| 09-01-03 | 01 | 1 | CLAS-01 | route | `bun test tests/routes/setups.test.ts` | ❌ W0 | ⬜ pending |
+| 09-02-01 | 02 | 2 | CLAS-02 | unit | `bun test tests/services/setup.service.test.ts` | ❌ W0 | ⬜ pending |
+| 09-02-02 | 02 | 2 | VIZZ-01, VIZZ-02, VIZZ-03 | manual | N/A — visual component | N/A | ⬜ pending |
+
+*Status: ⬜ pending · ✅ green · ❌ red · ⚠️ flaky*
+
+---
+
+## Wave 0 Requirements
+
+- [ ] `tests/services/setup.service.test.ts` — classification CRUD tests (service layer)
+- [ ] `tests/routes/setups.test.ts` — classification API endpoint tests
+- [ ] `tests/helpers/db.ts` — update CREATE TABLE for setup_items to include classification column
+
+*Existing test infrastructure covers framework setup. Wave 0 adds phase-specific test files.*
+
+---
+
+## Manual-Only Verifications
+
+| Behavior | Requirement | Why Manual | Test Instructions |
+|----------|-------------|------------|-------------------|
+| Classification badge click-to-cycle | CLAS-01 | UI interaction, React component | Click badge on item card in setup, verify it cycles base→worn→consumable→base |
+| Summary card weight subtotals | CLAS-02 | Visual layout verification | Add items to setup, classify some as worn/consumable, verify subtotals update |
+| Donut chart renders with segments | VIZZ-01 | Recharts canvas/SVG rendering | Open setup with items, verify donut chart shows colored segments |
+| Chart toggle category/classification | VIZZ-02 | UI interaction | Click pill toggle, verify chart segments change between category and classification views |
+| Chart hover tooltips | VIZZ-03 | Hover interaction | Hover over donut segments, verify tooltip shows name, weight, percentage |
+
+---
+
+## 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