docs(04): add validation strategy

.planning/phases/04-analysis-orchestration/04-VALIDATION.md

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+---
+phase: 04
+slug: analysis-orchestration
+status: draft
+nyquist_compliant: true
+wave_0_complete: true
+created: 2026-03-13
+---
+
+# Phase 4 — Validation Strategy
+
+> Per-phase validation contract for feedback sampling during execution.
+
+---
+
+## Test Infrastructure
+
+| Property | Value |
+|----------|-------|
+| **Framework** | pytest 8.x |
+| **Config file** | pytest.ini (exists) |
+| **Quick run command** | `pytest tests/unit -v --tb=short` |
+| **Full suite command** | `pytest -v` |
+| **Estimated runtime** | ~30 seconds |
+
+---
+
+## Sampling Rate
+
+- **After every task commit:** Run `pytest tests/unit -v --tb=short -x`
+- **After every plan wave:** Run `pytest -v`
+- **Before `/gsd:verify-work`:** Full suite must be green
+- **Max feedback latency:** 30 seconds
+
+---
+
+## Per-Task Verification Map
+
+| Task ID | Plan | Wave | Requirement | Test Type | Automated Command | File Exists | Status |
+|---------|------|------|-------------|-----------|-------------------|-------------|--------|
+| 04-01-01 | 01 | 1 | MNT-01 | unit | `pytest tests/test_processors/test_base.py -v` | ⬜ W0 | ⬜ pending |
+| 04-01-02 | 01 | 1 | MNT-01 | unit | `pytest tests/test_processors/test_parse.py -v` | ⬜ W0 | ⬜ pending |
+| 04-02-01 | 02 | 2 | MNT-01 | unit | `pytest tests/test_processors/test_download.py -v` | ⬜ W0 | ⬜ pending |
+| 04-03-01 | 03 | 3 | MNT-01 | unit | `pytest tests/test_processors/test_analyze.py -v` | ⬜ W0 | ⬜ pending |
+| 04-04-01 | 04 | 4 | MNT-01 | unit | `pytest tests/test_pipeline/test_pipeline.py -v` | ⬜ W0 | ⬜ pending |
+| 04-04-02 | 04 | 4 | MNT-01 | unit | `pytest tests/test_cli/test_process_command.py -v` | ⬜ W0 | ⬜ pending |
+| 04-05-01 | 05 | 5 | MNT-01 | integration | `pytest tests/test_integration/test_e2e_workflow.py -v` | ⬜ W0 | ⬜ pending |
+
+*Status: ⬜ pending · ✅ green · ❌ red · ⚠️ flaky*
+
+---
+
+## Wave 0 Requirements
+
+Existing infrastructure covers all phase requirements:
+- `pytest.ini` — configured with pythonpath
+- `tests/conftest.py` — shared fixtures exist
+- `tests/test_processors/` — directory exists for processor tests
+
+---
+
+## Manual-Only Verifications
+
+| Behavior | Requirement | Why Manual | Test Instructions |
+|----------|-------------|------------|-------------------|
+| AI analysis quality | MNT-01 | Requires AI API call | Run `kb-workflow process <url>` and verify report quality |
+| E2E with real URLs | MNT-01 | Network dependent | Test with actual B站/知乎 URLs |
+
+---
+
+## Validation Sign-Off
+
+- [x] All tasks have `<automated>` verify or Wave 0 dependencies
+- [x] Sampling continuity: no 3 consecutive tasks without automated verify
+- [x] Wave 0 covers all MISSING references
+- [x] No watch-mode flags
+- [x] Feedback latency < 30s
+- [x] `nyquist_compliant: true` set in frontmatter
+
+**Approval:** pending