diff --git a/conductor/tracks/discussion_takes_branching_20260311/plan.md b/conductor/tracks/discussion_takes_branching_20260311/plan.md
index 00e1a62..bd70f67 100644
--- a/conductor/tracks/discussion_takes_branching_20260311/plan.md
+++ b/conductor/tracks/discussion_takes_branching_20260311/plan.md
@@ -18,8 +18,8 @@
 - [x] Task: Implement the sequence differencing and compression logic to clearly highlight variances between takes. [510527c]
 - [x] Task: Conductor - User Manual Verification 'Phase 3: Synthesis Workflow Formatting' (Protocol in workflow.md)
 
-## Phase 4: Synthesis UI & Agent Integration
+## Phase 4: Synthesis UI & Agent Integration [checkpoint: 253d386]
 - [x] Task: Write GUI tests for the multi-take selection interface and synthesis action. [a452c72]
 - [x] Task: Implement a UI mechanism allowing users to select multiple takes and provide a synthesis prompt. [a452c72]
 - [x] Task: Implement the execution pipeline to feed the compressed differences and user prompt to an AI agent, and route the generated synthesis to a new "take" tab. [a452c72]
-- [ ] Task: Conductor - User Manual Verification 'Phase 4: Synthesis UI & Agent Integration' (Protocol in workflow.md)
\ No newline at end of file
+- [x] Task: Conductor - User Manual Verification 'Phase 4: Synthesis UI & Agent Integration' (Protocol in workflow.md)
\ No newline at end of file