undo-last-change

What it does

Reverts the most recent implement-step by performing a git reset --hard HEAD~1. This undoes the last code change and updates the project state to reflect the rollback.

Input

Parameter	Type	Required	Description
projectPath	string	No	Path to the project directory (default: cwd)

Notes

• Only reverts one step at a time. Call multiple times to go further back.
• Updates .mistflow/state.json to mark the step as incomplete.
• This is a destructive operation — uncommitted changes are lost.
• The AI typically uses this when a step introduces bugs that are easier to redo than fix.