Merge Open PRs

Review every open pull request aimed at the default/trunk branch, merge the ones that pass review and CI into the trunk, then tidy up the branches and worktrees the merges leave behind. This is an orchestrator: it reviews with code-review, merges with gh, and prunes with release-cleanup. It never bypasses a failing gate and never deletes work that is not provably merged.

This skill is standalone and manually triggerable (exposed as /merge). It does not cut a release (use the release skill to tag from trunk) and does not deploy (use deploy). It lands the open feature/fix PRs onto the trunk and cleans up.

Contract

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