---
phase: 14
slug: robustness-cost
status: draft
nyquist_compliant: true
wave_0_complete: true
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