---
phase: 26
slug: pwa-performance
status: draft
nyquist_compliant: false
wave_0_complete: false
created: 2026-04-02
---

# Phase 26 — Validation Strategy

> Per-phase validation contract for feedback sampling during execution.

---

## Test Infrastructure

| Property | Value |
|----------|-------|
| **Framework** | vitest 3.x |
| **Config file** | vitest.config.ts (existing) |
| **Quick run command** | `npx vitest run --no-coverage` |
| **Full suite command** | `npx vitest run --no-coverage` |
| **Estimated runtime** | ~5 seconds |

---

## Sampling Rate

- **After every task commit:** Run `npx vitest run --no-coverage`
- **After every plan wave:** Run `npx vitest run --no-coverage`
- **Before `/gsd:verify-work`:** Full suite must be green
- **Max feedback latency:** 10 seconds

---

## Per-Task Verification Map

| Task ID | Plan | Wave | Requirement | Test Type | Automated Command | File Exists | Status |
|---------|------|------|-------------|-----------|-------------------|-------------|--------|
| TBD | TBD | TBD | PWA-01..08, PERF-01, PERF-05 | unit+integration | `npx vitest run` | TBD | ⬜ pending |

*Status: ⬜ pending · ✅ green · ❌ red · ⚠️ flaky*

*Note: Task-level mapping will be populated by the planner.*

---

## Wave 0 Requirements

- Existing vitest infrastructure covers server and UI tests
- No new test framework installation needed

*Existing infrastructure covers all phase requirements.*

---

## Manual-Only Verifications

| Behavior | Requirement | Why Manual | Test Instructions |
|----------|-------------|------------|-------------------|
| Add to Home Screen prompt | PWA-01 | Browser-specific install prompt | Visit on mobile Chrome, verify install banner |
| Splash screen and icon | PWA-02 | Visual rendering on device | Install PWA, verify icon and splash |
| Offline mode + message queue | PWA-03, PWA-04 | Requires network disconnection | Disable network, verify cached UI loads, send message, reconnect |
| Mobile keyboard layout | PWA-05 | Physical device interaction | Open on phone, verify sticky input bar with keyboard |
| Pull-to-refresh gesture | PWA-06 | Touch gesture on mobile | Pull down on conversation list |
| Push notifications | PWA-07 | Requires real push subscription | Accept notifications, trigger agent event |
| Page load time | PERF-01, PERF-05 | Requires Lighthouse/DevTools | Run Lighthouse audit, verify <2s broadband |

---

## 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 < 10s
- [ ] `nyquist_compliant: true` set in frontmatter

**Approval:** pending