ac-coverage

# AC Coverage Assistant | AC 覆蓋率助手 Analyze Acceptance Criteria (AC) to test traceability and generate coverage reports. 分析驗收條件（AC）與測試之間的追蹤關係，並產生覆蓋率報告。 ## What This Does vs `/coverage` | 與 `/coverage` 的區別 | Aspect | `/coverage` | `/ac-coverage` | |--------|-------------|----------------| | **Scope** | Code-level (line/branch/function) | Requirement-level (AC-to-test) | | **Input** | Source code + test runner | SPEC file + test annotations | | **Question** | "How much code is tested?" | "Which AC have tests?" | | **Output** | Coverage percentages | Traceability matrix + gap report | ## Workflow | 工作流程 1. **Parse SPEC** — Extract AC definitions (AC-1, AC-2, ...) from the specification file 2. **Scan Tests** — Search test files for `@AC` and `@SPEC` annotations using standard linking conventions 3. **Build Matrix** — Map each AC to its test references (file, test name, line) 4. **Classify Status** — Mark each AC as ✅ covered, ⚠️ partial, or ❌ uncovered 5. **Calculate Coverage** — Apply formula: `Coverage % = (covered + partial × 0.5) / total × 100` 6. **Generate Report** — Output standardized Markdown report ## Linking Convention | 標註慣例 Tests MUST reference their source AC using standard annotations: ```typescript // TypeScript/JavaScript describe('AC-1: User login with valid credentials', () => { // @AC AC-1 // @SPEC SPEC-001 it('should redirect to dashboard on successful login', () => { ... }); }); ``` ```python # Python class TestAC1_UserLogin: """AC-1: User login with valid credentials @AC AC-1 @SPEC SPEC-001 """ def test_redirect_to_dashboard(self): ... ``` ```gherkin # BDD Feature @SPEC-001 @AC-1 Scenario: User login with valid credentials ``` ## Coverage Thresholds | 覆蓋率門檻 | Threshold | Default Value | Enforcement | |-----------|---------------|-------------| | **Check-in** | 80% | Required for feature branch merge | | **Release** | 100% | Required for production release | | **Warning** | 60% | Triggers coverage warning | Thresholds are configurable via `--threshold` parameter or project configuration. ## Report Format | 報告格式 The generated report follows the standard format from `core/acceptance-criteria-traceability.md`: ```markdown # AC Coverage Report **Specification**: SPEC-001 — Feature Name **Generated**: 2026-03-18 **Coverage**: 75% (6/8 AC) ## Summary | Status | Count | Percentage | |--------|-------|------------| | ✅ Covered | 5 | 62.5% | | ⚠️ Partial | 2 | 25.0% | | ❌ Uncovered | 1 | 12.5% | ## Traceability Matrix | AC-ID | Description | Status | Test Reference | |-------|-------------|--------|----------------| | AC-1 | Login with valid credentials | ✅ | auth.test.ts:15 | | AC-2 | Reject invalid credentials | ✅ | auth.test.ts:32 | | ... | ... | ... | ... | ## Gaps - **AC-8**: Social login — Blocked by OAuth sandbox ## Action Items 1. [ ] AC-8: Set up OAuth sandbox (ETA: TBD) ``` ## Next Steps Guidance | 下一步引導 After `/ac-coverage` completes, the AI assistant should suggest: > **AC 覆蓋率分析完成。建議下一步 / AC coverage analysis complete. Suggested next steps:** > - 覆蓋率達標 → 執行 `/checkin` 品質關卡 — Coverage meets threshold → Run `/checkin` quality gates > - 有未覆蓋 AC → 執行 `/derive-tdd` 補齊測試 — Uncovered AC found → Run `/derive-tdd` to add tests > - 有部分覆蓋 AC → 檢查缺少的邊界情況 — Partial AC → Review missing edge cases ## Reference | 參考 - Core standard: [acceptance-criteria-traceability.md](../../core/acceptance-criteria-traceability.md) - SPEC: [SPEC-AC-COVERAGE.md](../../docs/specs/skills/SPEC-AC-COVERAGE.md) - Related: [test-coverage-assistant](../test-coverage-assistant/SKILL.md) (code-level coverage) - Related: [checkin-assistant](../checkin-assistant/SKILL.md) (quality gates)