diff --git a/conductor/tracks/mma_core_engine_20260224/plan.md b/conductor/tracks/mma_core_engine_20260224/plan.md
index 4ad5841..481ef26 100644
--- a/conductor/tracks/mma_core_engine_20260224/plan.md
+++ b/conductor/tracks/mma_core_engine_20260224/plan.md
@@ -15,8 +15,8 @@
 ## Phase 2: Track 2 - State Machine & Data Structures
 - [x] Task: The Dataclasses (f9b5a50)
     - [x] Create `models.py` defining `Ticket` and `Track` (f9b5a50)
-- [ ] Task: Worker Context Definition
-    - [ ] Define `WorkerContext` holding `Ticket` ID, model config, and ephemeral messages
+- [x] Task: Worker Context Definition (ee71929)
+    - [x] Define `WorkerContext` holding `Ticket` ID, model config, and ephemeral messages (ee71929)
 - [ ] Task: State Mutator Methods
     - [ ] Implement `ticket.mark_blocked()`, `ticket.mark_complete()`, `track.get_executable_tickets()`