# Progress — challenger_18_1

**Last visited**: 2026-10-02T06:58:00Z
**Status**: Empirical stress testing complete. Findings reproduced and documented. Preparing handoff.md.

- [x] Step 1: DISPATCH.md updated with timestamp header.
- [x] Step 2: BRIEFING.md created.
- [x] Step 3: Reference documents read (ORIGINAL_REQUEST.md, PROJECT.md, TEST_READY.md, worker_iter3/handoff.md).
- [x] Step 4: Examine client codebase (`client/web_pc/`) and existing test suites.
- [x] Step 5: Design and implement empirical adversarial stress test script (`empirical_stress_test.py`, `test_targeted_findings.py`, `test_chat_guard.py`).
- [x] Step 6: Execute adversarial test script and project unit/E2E test suite.
- [x] Step 7: Analyze failure modes, edge cases, attack cancellation, kinematics consistency.
- [x] Step 8: Update BRIEFING.md.
- [ ] Step 9: Write comprehensive handoff.md with 5 components and verdict: REJECT.
- [ ] Step 10: Notify parent agent via send_message.