Open with orientation
Check the working state, read the current task, and revisit any session note that affects it. Confirm the relevant files still match your assumptions. Choose a small outcome and a check that would demonstrate it. For an unfamiliar area, make the first request an explanation or investigation rather than an edit.
Close with a reviewed result
Inspect the diff against the intended behavior, then run the checks appropriate to the change. Record failures and anything left unverified. Update the task state and leave one next action if work remains. Before moving to another repository, confirm that its context and permissions will not be confused with the session you are leaving.