docs(01-01): complete WorkflowStateManager plan

Summary: - WorkflowStateManager with atomic write and backup rotation - 90% test coverage (20 tests) - 5 min execution time State updates: - Plan counter advanced to 3 - Progress: 67% (2/3 plans complete) - Requirements marked complete: PIPE-02, REL-01 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-13 17:19:37 +08:00
parent c87dd8b803
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+---
+phase: 01-foundation
+plan: 01
+subsystem: state-management
+tags: [pydantic, atomic-write, backup-rotation, crash-recovery]
+
+# Dependency graph
+requires:
+  - phase: 01-foundation
+    plan: 02
+    provides: WorkflowState, StepRecord, StepStatus from schemas.py
+provides:
+  - WorkflowStateManager class with atomic write and backup fallback
+  - State persistence for workflow steps
+  - Idempotent state creation via get_or_create
+affects: [pipeline-executor, workflow-orchestration]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - Atomic write pattern (tempfile.mkstemp + os.replace)
+    - Backup rotation (state.json -> state.json.bak)
+    - Fallback loading (main file -> backup on corruption)
+
+key-files:
+  created:
+    - kb_pipeline/state.py
+  modified:
+    - kb_pipeline/__init__.py
+    - tests/test_pipeline/test_state.py
+
+key-decisions:
+  - "Follow gsd-openclaw atomic write pattern for crash-safe persistence"
+  - "Return None instead of raising exception when no state file exists"
+  - "Silently fallback to backup on JSON parse errors"
+
+patterns-established:
+  - "Atomic write: write to temp file in same directory, then os.replace"
+  - "Backup rotation: rename existing state file to .bak before writing new"
+  - "Fallback loading: try main file first, then backup on any parse error"
+
+requirements-completed: [PIPE-02, REL-01, REL-03]
+
+# Metrics
+duration: 5min
+completed: 2026-03-13
+---
+
+# Phase 1 Plan 01: WorkflowStateManager Summary
+
+**WorkflowStateManager 实现原子写入、备份轮转和崩溃恢复的状态管理**
+
+## Performance
+
+- **Duration:** 5 min
+- **Started:** 2026-03-13T09:12:34Z
+- **Completed:** 2026-03-13T09:17:28Z
+- **Tasks:** 3
+- **Files modified:** 3
+
+## Accomplishments
+- WorkflowStateManager with atomic write pattern (tempfile + os.replace)
+- Backup rotation for crash recovery (workflow_state.json -> .bak)
+- Fallback loading when main file is corrupted
+- get_or_create for idempotent state creation
+- 90% test coverage (20 tests)
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Write failing tests** - `246e403` (test)
+2. **Task 2: Implement WorkflowStateManager** - `624cd76` (feat)
+3. **Task 3: Export from package** - `0dbb0c4` (refactor)
+
+**Plan metadata:** (pending final commit)
+
+_Note: TDD tasks had test -> feat -> refactor commits_
+
+## Files Created/Modified
+- `kb_pipeline/state.py` - WorkflowStateManager with atomic write, backup rotation, and fallback loading
+- `kb_pipeline/__init__.py` - Added WorkflowStateManager to package exports
+- `tests/test_pipeline/test_state.py` - 20 test cases covering all functionality
+
+## Decisions Made
+- Followed gsd-openclaw reference implementation for atomic write pattern
+- Return None instead of raising exception when no state file exists (simpler API)
+- Silently fallback to backup on JSON parse errors (robustness over strictness)
+
+## Deviations from Plan
+
+### Auto-fixed Issues
+
+**1. [Rule 1 - Bug] Fixed test case for backup fallback**
+- **Found during:** Task 2 (GREEN phase)
+- **Issue:** Test `test_load_falls_back_to_backup_on_corruption` expected backup to exist after single save, but backup is only created on second save
+- **Fix:** Modified test to save twice before corrupting main file, ensuring backup exists
+- **Files modified:** tests/test_pipeline/test_state.py
+- **Verification:** All 20 tests pass
+- **Committed in:** 624cd76 (Task 2 commit)
+
+---
+
+**Total deviations:** 1 auto-fixed (1 bug)
+**Impact on plan:** Minor test fix, no scope creep
+
+## Issues Encountered
+- pytest not found in system PATH - used project's .venv/bin/pytest instead
+
+## User Setup Required
+None - no external service configuration required.
+
+## Next Phase Readiness
+- State management foundation complete
+- Ready for pipeline executor implementation
+- Can now track step completion status with crash recovery
+
+## Self-Check: PASSED
+- kb_pipeline/state.py: FOUND
+- tests/test_pipeline/test_state.py: FOUND
+- 01-01-SUMMARY.md: FOUND
+- Commits: 246e403, 624cd76, 0dbb0c4: FOUND
+
+---
+*Phase: 01-foundation*
+*Completed: 2026-03-13*