diff --git a/conductor/tracks/mock_provider_hardening_20260305/plan.md b/conductor/tracks/mock_provider_hardening_20260305/plan.md
index fce40ed..288a87a 100644
--- a/conductor/tracks/mock_provider_hardening_20260305/plan.md
+++ b/conductor/tracks/mock_provider_hardening_20260305/plan.md
@@ -9,13 +9,13 @@
     - [x] SAFETY: Ensure it still defaults to `success` to not break existing tests.
 - [x] Task: Conductor - User Manual Verification 'Phase 1: Mock Extension' [f186d81]
 
-## Phase 2: Negative Path Testing
-- [ ] Task: Write `test_negative_flows.py`
-    - [ ] WHERE: `tests/test_negative_flows.py`
-    - [ ] WHAT: Write tests that launch `live_gui`, inject `MOCK_MODE` via `ApiHookClient` custom callback or `env` dictionary, and assert the UI gracefully handles the failure.
-    - [ ] HOW: Use `wait_for_event('response')` and check that the payload status is `"error"`.
-    - [ ] SAFETY: Ensure `timeout` tests don't actually hang the test suite for 120s (configure the timeout shorter if possible in test setup).
-- [ ] Task: Conductor - User Manual Verification 'Phase 2: Negative Tests'
+## Phase 2: Negative Path Testing [checkpoint: 7e88ef6]
+- [x] Task: Write `test_negative_flows.py` [f5fa001]
+    - [x] WHERE: `tests/test_negative_flows.py`
+    - [x] WHAT: Write tests that launch `live_gui`, inject `MOCK_MODE` via `ApiHookClient` custom callback or `env` dictionary, and assert the UI gracefully handles the failure.
+    - [x] HOW: Use `wait_for_event('response')` and check that the payload status is `"error"`.
+    - [x] SAFETY: Ensure `timeout` tests don't actually hang the test suite for 120s (configure the timeout shorter if possible in test setup).
+- [x] Task: Conductor - User Manual Verification 'Phase 2: Negative Tests' [7e88ef6]
 
 ## Phase 3: Final Validation
 - [ ] Task: Full Suite Validation