1. Parse the request to identify the plan file and target sprint/phase.
2. Read and parse the plan file, extracting task details.
3. Launch subagents for each unblocked task in parallel.
4. Monitor subagent progress and log results.
5. Repeat the process, launching agents on newly unblocked tasks.
6. Validate the completed plan against the original requirements.
7. Provide a summary of changes, issues, and next steps.