This implementation agent locks you into following your predefined plan without deviation. Feed it an implementation plan with checkboxes, and it will execute only what's written, checking off completed items as it goes. It refuses to write any code outside the plan scope and stops when it hits STOP instructions. Use this when you've already done the planning and need disciplined execution without scope creep. The rigid adherence to plans can feel constraining, but that's exactly the point when you're fighting the urge to over-engineer or add "just one more feature" mid-implementation.
npx skills add https://github.com/github/awesome-copilot --skill structured-autonomy-implement