WIP almost done with track planning

conductor/tracks/pipeline_pause_resume_20260306/spec.md

@@ -1,27 +1,21 @@
-# Track Specification: Pipeline Pause/Resume
+# Track Specification: Pipeline Pause/Resume (pipeline_pause_resume_20260306)
 
 ## Overview
-Global pause/resume for entire DAG execution pipeline.
+Add global pause/resume for entire DAG execution pipeline. Allow user to freeze all worker activity and resume later.
 
-## Current State Audit
-### Already Implemented
-- DAG engine execution
-- auto_queue mode
-
-### Gaps to Fill
-- No pause mechanism
-- No resume capability
-
-## Goals
-- Global pause button
-- Resume button
-- Frozen state visualization
+## Architectural Constraints
+- **State Preservation**: Worker state MUST be preserved across pause.
+- **Atomic Operation**: Pause/Resume MUST be atomic.
 
 ## Functional Requirements
-- Pause all workers
-- Resume from paused state
-- State persistence
+- **Pause Button**: Freeze all worker activity.
+- **Resume Button**: Continue from paused state.
+- **Visual Indicator**: Show pipeline is paused.
+- **State Display**: Show which workers are paused.
 
-## Non-Functional Requirements
-- Worker state preservation
-- Clean resume
+## Acceptance Criteria
+- [ ] Pause button freezes pipeline.
+- [ ] Resume button continues execution.
+- [ ] Visual indicator shows paused state.
+- [ ] Worker states preserved.
+- [ ] No data loss on resume.