docs(phase-5): add research and validation strategy

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.planning/phases/05-package-export/05-VALIDATION.md

@@ -0,0 +1,78 @@
+---
+phase: 5
+slug: package-export
+status: draft
+nyquist_compliant: false
+wave_0_complete: false
+created: 2026-04-10
+---
+
+# Phase 5 — Validation Strategy
+
+> Per-phase validation contract for feedback sampling during execution.
+
+---
+
+## Test Infrastructure
+
+| Property | Value |
+|----------|-------|
+| **Framework** | pytest (existing test suite) |
+| **Config file** | none — runs with `pytest tests/` |
+| **Quick run command** | `pytest tests/test_packages.py tests/test_icon_upload.py -x` |
+| **Full suite command** | `pytest tests/ -x` |
+| **Estimated runtime** | ~10 seconds |
+
+---
+
+## Sampling Rate
+
+- **After every task commit:** Run `pytest tests/test_packages.py tests/test_icon_upload.py -x`
+- **After every plan wave:** Run `pytest tests/ -x`
+- **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 |
+|---------|------|------|-------------|-----------|-------------------|-------------|--------|
+| 05-01-01 | 01 | 1 | PKG-03 | integration | `pytest tests/test_packages.py::TestNinjaDownload -x` | ❌ W0 | ⬜ pending |
+| 05-02-01 | 02 | 1 | PKG-01 | integration | `pytest tests/test_packages.py::TestIntunewinDownload -x` | ❌ W0 | ⬜ pending |
+| 05-02-02 | 02 | 1 | PKG-02 | unit | `pytest tests/test_intunewin.py -x` | ✅ | ⬜ pending |
+| 05-03-01 | 03 | 2 | PKG-04 | integration | `pytest tests/test_icon_upload.py -x` | ❌ W0 | ⬜ pending |
+| 05-03-02 | 03 | 2 | PKG-05 | integration | `pytest tests/test_packages.py::TestCommandPreview -x` | ❌ W0 | ⬜ pending |
+
+*Status: ⬜ pending · ✅ green · ❌ red · ⚠️ flaky*
+
+---
+
+## Wave 0 Requirements
+
+- [ ] `tests/test_packages.py` — stubs for PKG-01, PKG-03, PKG-05
+- [ ] `tests/test_icon_upload.py` — stubs for PKG-04
+- [ ] `requirements.txt` — add `Pillow>=10.0` if icon dimension validation is implemented
+
+*PKG-02: existing `tests/test_intunewin.py` already covers the format — no new test file needed.*
+
+---
+
+## Manual-Only Verifications
+
+| Behavior | Requirement | Why Manual | Test Instructions |
+|----------|-------------|------------|-------------------|
+| .intunewin accepted by real Intune tenant | PKG-01 | Requires live Azure/Intune environment | Upload generated .intunewin via Intune portal → verify app appears without errors |
+
+---
+
+## 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