# Work Card Execution Receipt

## Card Reference
- **Card ID**: [e.g. CARD-04]
- **Title**: [e.g. Implement JWT Verification Middleware]
- **Status**: [COMPLETED / IN_PROGRESS]

## Touched Files & Modifications
- [x] `src/middleware/jwt-verifier.ts` (New file: Implemented token parsing and signature verification)
- [x] `test/middleware/jwt-verifier.test.ts` (New file: Added unit tests with test vectors)

## Invariant & Acceptance Verification
- **Acceptance Command**: `bun test test/middleware/jwt-verifier.test.ts`
- **Result**: PASSED (6 tests passed, 0 failures in 12ms)
- **Mutation Generation**: Advanced to gen 4.