# Plan, execute and review changes

Keep preparation, execution and canonical Apply distinct.

## Prepare a plan

Use the Plan button, or Shift+Tab while the composer has focus. Specify your objective, constraints and acceptance conditions. Review the structured project plan and edit it before execution. A saved plan is not evidence that its steps ran.

## Execute in isolation

Explicitly approve execution. The assistant works on an isolated candidate; that is not yet your accepted project. Inspect command results, warnings and simulation evidence. Approval applies to the particular action and revision, not to unrelated later work.

## Compare and decide

Changes shows the current candidate against its baseline. Project History contains retained revisions and lifecycle records. Review files and supported object/visual comparisons, then Apply or reject. Unsupported comparisons must say so. A candidate modified after review needs fresh approval.

## Recover safely

If your trusted project changes concurrently, resolve the conflict instead of overwriting it. Rollback must preserve unrelated later edits. Save a backup before major changes and distinguish a visually attractive result from a validated simulation.