Automation

Cleans up after merged work, once it shipped: removing a branch needs git, the forge or the user to say it merged; removing it or filling in its issue waits for the pipeline holding it to pass; merged, clean work gets a follow-up to remove its worktree and branches.

Comments worth keeping: limit-edits flags comment-heavy edits, limit-turns sends a follow-up when a turn's diff adds too many comments.