docs(phase-30): add validation strategy

.planning/phases/30-onboarding-redesign/30-VALIDATION.md

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+---
+phase: 30
+slug: onboarding-redesign
+status: draft
+nyquist_compliant: false
+wave_0_complete: false
+created: 2026-04-12
+---
+
+# Phase 30 — Validation Strategy
+
+> Per-phase validation contract for feedback sampling during execution.
+
+---
+
+## Test Infrastructure
+
+| Property | Value |
+|----------|-------|
+| **Framework** | Bun test (unit/integration), Playwright (E2E) |
+| **Config file** | `bunfig.toml`, `playwright.config.ts` |
+| **Quick run command** | `bun test` |
+| **Full suite command** | `bun test && bun run test:e2e` |
+| **Estimated runtime** | ~30 seconds (unit) + ~60 seconds (E2E) |
+
+---
+
+## Sampling Rate
+
+- **After every task commit:** Run `bun test`
+- **After every plan wave:** Run `bun test && bun run test:e2e`
+- **Before `/gsd-verify-work`:** Full suite must be green
+- **Max feedback latency:** 30 seconds
+
+---
+
+## Per-Task Verification Map
+
+| Task ID | Plan | Wave | Requirement | Threat Ref | Secure Behavior | Test Type | Automated Command | File Exists | Status |
+|---------|------|------|-------------|------------|-----------------|-----------|-------------------|-------------|--------|
+| 30-01-01 | 01 | 1 | D-09/D-10 | — | N/A | integration | `bun test tests/services/discovery.service.test.ts` | ❌ W0 | ⬜ pending |
+| 30-01-02 | 01 | 1 | D-11/D-12 | — | N/A | integration | `bun test tests/services/onboarding.service.test.ts` | ❌ W0 | ⬜ pending |
+| 30-02-01 | 02 | 2 | D-06/D-07/D-08 | — | N/A | E2E | `bun run test:e2e -- --grep onboarding` | ❌ W0 | ⬜ pending |
+| 30-02-02 | 02 | 2 | D-13/D-14/D-15 | — | N/A | E2E | `bun run test:e2e -- --grep onboarding` | ❌ W0 | ⬜ pending |
+| 30-03-01 | 03 | 2 | D-16/D-17/D-18 | — | N/A | E2E | `bun run test:e2e -- --grep onboarding` | ❌ W0 | ⬜ pending |
+
+*Status: ⬜ pending · ✅ green · ❌ red · ⚠️ flaky*
+
+---
+
+## Wave 0 Requirements
+
+- [ ] `tests/services/discovery.service.test.ts` — stubs for popular items by tag query
+- [ ] `tests/services/onboarding.service.test.ts` — stubs for batch item creation from catalog
+- [ ] `e2e/onboarding.spec.ts` — stubs for full onboarding flow E2E
+
+*Existing test infrastructure covers framework setup — no new framework install needed.*
+
+---
+
+## Manual-Only Verifications
+
+| Behavior | Requirement | Why Manual | Test Instructions |
+|----------|-------------|------------|-------------------|
+| Full-screen visual polish | D-13 | Visual design quality | Open app in incognito, verify full-viewport steps with generous spacing |
+| Step transitions smoothness | D-15 | Animation quality | Navigate through all steps, verify smooth transitions |
+| Hobby card visual design | D-06 | Design subjective | Verify card layout matches Notion/Linear style |
+
+---
+
+## 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 < 30s
+- [ ] `nyquist_compliant: true` set in frontmatter
+
+**Approval:** pending