Completes the B1 loop past EXECUTING, and answers the question raised reviewing #6: PR acceptance is a milestone's final gate, so there is no separate FINISHED state — completion returns to milestone planning or to IDLE. - publish.py: MilestonePublisher commits the work on a task-namespaced branch, pushes, and opens a PR carrying the approved plan. Intent is recorded before the first externally visible act, so a crash anywhere in the sequence leaves a durable record and boot reconciliation asks Gitea whether the PR exists rather than opening a second one - Nothing to commit is reported, not raised: the executor may legitimately conclude there was nothing to change - control.py: PR_OPEN state with EXECUTING -> PR_OPEN and PR_OPEN -> {MILESTONE_PLANNING, IDLE}; operator commands 'next milestone' and 'project complete' - A configured publisher always contributes its own reconciler at boot, so an interrupted publish is settled against external truth without the caller having to remember to register it - A publish failure gates to the operator rather than retrying into a possible duplicate Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>