# Track Specification: Pipeline Pause/Resume

## Overview
Global pause/resume for entire DAG execution pipeline.

## 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

## Functional Requirements
- Pause all workers
- Resume from paused state
- State persistence

## Non-Functional Requirements
- Worker state preservation
- Clean resume