docs(02): add phase 2 plans

.planning/phases/02-platform-skills/02-VALIDATION.md

@@ -0,0 +1,83 @@
+---
+phase: 2
+slug: platform-skills
+status: draft
+nyquist_compliant: false
+wave_0_complete: false
+created: 2026-03-13
+---
+
+# Phase 2 — Validation Strategy
+
+> Per-phase validation contract for feedback sampling during execution.
+
+---
+
+## Test Infrastructure
+
+| Property | Value |
+|----------|-------|
+| **Framework** | pytest 8.x |
+| **Config file** | pytest.ini |
+| **Quick run command** | `pytest tests/test_pipeline/test_link_parser.py tests/test_platforms/ -x -v` |
+| **Full suite command** | `pytest tests/ -v --cov=kb_pipeline` |
+| **Estimated runtime** | ~15 seconds |
+
+---
+
+## Sampling Rate
+
+- **After every task commit:** Run `pytest tests/test_pipeline/test_link_parser.py tests/test_platforms/ -x`
+- **After every plan wave:** Run `pytest tests/ -v --cov=kb_pipeline`
+- **Before `/gsd:verify-work`:** Full suite must be green
+- **Max feedback latency:** 15 seconds
+
+---
+
+## Per-Task Verification Map
+
+| Task ID | Plan | Wave | Requirement | Test Type | Automated Command | File Exists | Status |
+|---------|------|------|-------------|-----------|-------------------|-------------|--------|
+| 02-01-01 | 01 | 1 | PLAT-01/02/03 | unit | `pytest tests/test_pipeline/test_link_parser.py -x` | ❌ W0 | ⬜ pending |
+| 02-01-02 | 01 | 1 | PLAT-01/02/03 | unit | `pytest tests/test_pipeline/test_idempotency.py -x` | ❌ W0 | ⬜ pending |
+| 02-02-01 | 02 | 1 | PLAT-01 | unit | `pytest tests/test_platforms/test_bilibili.py::test_video_metadata -x` | ❌ W0 | ⬜ pending |
+| 02-02-02 | 02 | 1 | PLAT-02 | unit | `pytest tests/test_platforms/test_bilibili.py::test_article_content -x` | ❌ W0 | ⬜ pending |
+| 02-02-03 | 02 | 2 | PLAT-01 | integration | `pytest tests/test_platforms/test_bilibili.py::test_video_content -x` | ❌ W0 | ⬜ pending |
+| 02-03-01 | 03 | 2 | PLAT-03 | unit | `pytest tests/test_platforms/test_zhihu.py::test_answer_content -x` | ❌ W0 | ⬜ pending |
+| 02-03-02 | 03 | 2 | PLAT-03 | unit | `pytest tests/test_platforms/test_zhihu.py::test_zhuanlan_content -x` | ❌ W0 | ⬜ pending |
+
+*Status: ⬜ pending · ✅ green · ❌ red · ⚠️ flaky*
+
+---
+
+## Wave 0 Requirements
+
+- [ ] `tests/test_pipeline/test_link_parser.py` — LinkParser 单元测试
+- [ ] `tests/test_pipeline/test_idempotency.py` — 幂等检查测试
+- [ ] `tests/test_platforms/__init__.py` — 测试模块初始化
+- [ ] `tests/test_platforms/conftest.py` — 平台测试共享 fixtures
+- [ ] `tests/test_platforms/test_bilibili.py` — B站适配器测试
+- [ ] `tests/test_platforms/test_zhihu.py` — 知乎适配器测试
+- [ ] Mock fixtures: B站/知乎 API 响应数据
+
+---
+
+## Manual-Only Verifications
+
+| Behavior | Requirement | Why Manual | Test Instructions |
+|----------|-------------|------------|-------------------|
+| 短链解析 (b23.tv) | PLAT-01 | 需要真实网络请求 | 提供真实 b23.tv 短链，验证解析到正确 URL |
+| Cookie 过期检测 | PLAT-03 | 需要过期 Cookie | 使用过期 Cookie 访问知乎，验证错误提示 |
+
+---
+
+## 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 < 15s
+- [ ] `nyquist_compliant: true` set in frontmatter
+
+**Approval:** pending