finisher

Close out work by committing local changes, pushing, waiting for green CI, and merging the PR. Universal — works on any branch with an open PR; no task structure required. Use when asked to 'merge the PR', 'ship it', 'merge and close', 'commit push merge', 'finalize the PR', 'land it on main', 'we're done — close it out', or whenever the user signals end-of-work and the next step is to merge. If (and only if) the current work is one phase of a multi-phase task in tasks/**/phase-N-*/, also make upcoming phase tech-decomposition documents accurate for the implementation that just landed by adding handoff notes or updating stale assumptions before merging — otherwise this step is silently skipped. Make sure to use this skill whenever the user signals end-of-implementation and wants the changes merged — even if they don't say the word "skill". NOT for opening a new PR (use plain gh pr create). NOT for addressing review comments (use /prc). NOT for preparing a session handoff to a fresh context (use /ph).