# Progress — challenger_18_4

- Last visited: 2026-10-02T07:37:00Z
- Status: Complete. All empirical challenger tests, unit tests, and full 21 E2E tests PASSED. Hard handoff report written. Verdict: APPROVE.
- Tasks:
  - [x] Read DISPATCH.md, ORIGINAL_REQUEST.md, PROJECT.md, challenger_18_2 handoff, worker_iter4 handoff
  - [x] Initialize BRIEFING.md and progress.md
  - [x] Inspect existing test scripts (`test_do_primary.py`, `trace_errors.py`, etc.)
  - [x] Run `python .agents/teamwork/reviewer_18_2/test_do_primary.py`: PASS (`doPrimaryAttack evaluate result: OK`)
  - [x] Run `python .agents/teamwork/challenger_18_2/trace_errors.py`: PASS (0 page errors, 0 exceptions)
  - [x] Implement comprehensive empirical challenger test script `empirical_resilience_test.py`
  - [x] Run `python .agents/teamwork/challenger_18_4/empirical_resilience_test.py`:
    - Server path traversal rejection: 11/11 vectors returned HTTP 404 (PASS)
    - Multi-resolution scaling: 11/11 viewports (16:9, 16:10, 21:9, 32:9, 4:3) with 0 scrollbars (PASS)
    - Primary attack audio execution (`sfxEngine.playWeaponSlash`): SUCCESS, 0 TypeErrors (PASS)
    - 10 key/mouse action triggers (click, Q, W, E, R, 1, Space, C, I, Esc): 0 page/console errors (PASS)
    - RMB primary attack: 0 errors (PASS)
    - Dodge i-frame lifecycle & `#badge-iframe` expiration: 0 errors (PASS)
    - DOM element `#badge-iframe` presence: Verified (PASS)
    - Final page errors: 0, Console errors: 0 (PASS)
  - [x] Run `pytest tests/e2e/test_pc_desktop_client_e2e.py -k "traversal or zero_console" -v`: 2 passed in 4.11s (PASS)
  - [x] Run full `pytest tests/e2e/test_pc_desktop_client_e2e.py -v`: 21 passed in 58.55s (PASS)
  - [x] Write handoff.md with empirical metrics, logic chain, and verdict (APPROVE)
  - [x] Send notification message to parent agent