docs(14): add validation strategy

2026-03-23 20:54:44 +08:00
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+---
+phase: 14
+slug: robustness-cost
+status: draft
+nyquist_compliant: false
+wave_0_complete: false
+created: 2026-03-23
+---
+
+# Phase 14 — Validation Strategy
+
+> Per-phase validation contract for feedback sampling during execution.
+
+---
+
+## Test Infrastructure
+
+| Property | Value |
+|----------|-------|
+| **Framework** | pytest 7.x |
+| **Config file** | pytest.ini (已存在) |
+| **Quick run command** | `python3 -m pytest tests/test_semantic_robustness.py -v -x` |
+| **Full suite command** | `python3 -m pytest tests/ -v` |
+| **Estimated runtime** | ~5 seconds |
+
+---
+
+## Sampling Rate
+
+- **After every task commit:** Run `python3 -m pytest tests/test_semantic_robustness.py -v -x`
+- **After every plan wave:** Run `python3 -m pytest tests/ -v`
+- **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 |
+|---------|------|------|-------------|-----------|-------------------|-------------|--------|
+| 14-01-01 | 01 | 1 | ROBUST-01 | unit | `pytest tests/test_semantic_robustness.py::test_llm_failure_fallback -x` | ❌ W0 | ⬜ pending |
+| 14-02-01 | 02 | 1 | ROBUST-02 | unit | `pytest tests/test_semantic_robustness.py::test_parse_failure_retry -x` | ❌ W0 | ⬜ pending |
+| 14-02-02 | 02 | 1 | ROBUST-04 | unit | `pytest tests/test_semantic_robustness.py::test_fallback_logging -x` | ❌ W0 | ⬜ pending |
+| 14-03-01 | 03 | 1 | ROBUST-03 | unit | `pytest tests/test_semantic_robustness.py::test_ai_unavailable_fallback -x` | ❌ W0 | ⬜ pending |
+| 14-04-01 | 04 | 1 | COST-01 | unit | `pytest tests/test_semantic_robustness.py::test_long_text_chunking -x` | ❌ W0 | ⬜ pending |
+| 14-05-01 | 05 | 1 | COST-02 | unit | `pytest tests/test_semantic_robustness.py::test_cache_hit -x` | ❌ W0 | ⬜ pending |
+| 14-05-02 | 05 | 1 | COST-03 | integration | `pytest tests/test_srt_processor.py::test_semantic_segmentation_toggle -x` | ❌ W0 | ⬜ pending |
+
+*Status: ⬜ pending · ✅ green · ❌ red · ⚠️ flaky*
+
+---
+
+## Wave 0 Requirements
+
+- [ ] `tests/test_semantic_robustness.py` — 覆盖 ROBUST-01, ROBUST-02, ROBUST-03, ROBUST-04, COST-01, COST-02
+- [ ] `tests/test_srt_processor.py` — 覆盖 COST-03（配置开关）
+- [ ] `tests/conftest.py` — 共享 fixtures（mock LLM client, 样本字幕数据）
+- [ ] 框架安装: 无需安装，pytest 已配置
+
+**Mock Strategy:** 使用 unittest.mock.patch 模拟 SimpleAIClient.generate()，测试不同失败场景（网络错误、解析失败、超时等）
+
+---
+
+## Manual-Only Verifications
+
+| Behavior | Requirement | Why Manual | Test Instructions |
+|----------|-------------|------------|-------------------|
+| 无 | - | - | 所有阶段行为都有自动化验证 |
+
+---
+
+## 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