Done-card publication controls. Completed cards now inspect the exact BB worker checkout before offering manual publication actions. The panel can commit through BB, show and transition an existing pull request, request a guarded PR merge, or explicitly squash merge locally. Default branches, detached checkouts, non-Git folders, unavailable hosts, missing approvals, failing checks, and non-mergeable PRs fail closed with actionable guidance. Publication history is recorded independently from the workflow's Done status.