- Extract PEN encoding logic into separate testable module (penEncoder.ts)
- Implement 24 comprehensive tests covering:
- Position encoding and coordinate shifting
- Lock stitch direction calculation (forward/backward)
- Lock stitch generation with rotation
- Full PEN encoding with color changes, jumps, and bounds
- Edge cases (empty arrays, single stitches, TRIM flags)
- Setup vitest for testing
- Refactor pattern converter worker to use extracted penEncoder module
- Fix bounds calculation to include non-MOVE stitches (not just STITCH)
- Remove duplicate function definitions from worker
- Add test scripts: npm run test, npm run test:ui, npm run test:run
All tests passing (24/24) and build successful.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
