Implement Refactor

<refactor_input> $ARGUMENTS </refactor_input>

1. Resolve And Read

If the input is a markdown path, use it. Otherwise resolve .plugin-creator/plans/tasks-refactor-{slug}.md. Read the complete task file and linked design. Extract each task's ID, status, dependencies, target, execution role, acceptance criteria, verification steps, and safe parallel peers.

Gate: stop with STATUS: BLOCKED when either file is absent, a task lacks an execution contract, or dependency edges conflict with the design.

2. Build The Work Graph