# Compact Status - 2025-11-21

**Focus**: Code review follow-up fixes for incremental graph updates PR

**Key Accomplishments**:
1. Refactored DependencyHandler to factory pattern (`create()` returns `Result<DependencyHandler>`)
2. Added DoS prevention via MAX_DEPENDENCY_CHAIN_DEPTH validation
3. Added TaskDeleted event handler for graph-database consistency
4. Fixed CLAUDE.md and package.json blocked npm test references
5. Created and merged follow-up PR #29 with all fixes

**Critical Decisions**:
- Factory pattern chosen over lazy init/empty graph/two-phase - makes invalid states unrepresentable
- Changed validateTaskId to return Result<void> for consistency with codebase conventions

**Next Priority Actions**:
1. Update architecture docs for factory pattern
2. Consider version bump to 0.3.1
3. Review pre-existing issues in GitHub Issue #25

**Critical Issues**:
- None blocking

**Key Files Modified**:
- `src/services/handlers/dependency-handler.ts` - Factory pattern, depth validation
- `src/core/dependency-graph.ts` - Result pattern for mutations
- `src/core/events/events.ts` - TaskDeletedEvent
- `tests/unit/core/dependency-graph.test.ts` - 14 new validation tests

**Context Notes**:
DependencyHandler now uses factory pattern - call `DependencyHandler.create()` not constructor. All graph mutation methods (addEdge, removeEdge, removeTask) return `Result<void>`. npm test is blocked; use grouped test commands or `npm run test:all`.

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*Quick summary of [full status](./../2025-11-21_2215.md)*
