Land Stack

Take a finished orchestrate-implementation run from "every ticket has a draft PR" to "every PR is merged, every issue is closed, every worktree is gone". Landing is one-way, so each step proves its precondition before acting.

Contract

• Land oldest first. A PR merges only when it targets the target branch, its head equals the ledger's accepted head, and its checks are green.
• Human approval is optional. Without --require-approvals, the loop gate and green checks are the review. Say so in the report.
• Stop at the first PR that cannot merge. Merged tickets stay merged; the run pauses with the ledger and evidence, and resume continues from the next.
• Archive a ticket environment only after its merge is confirmed on the remote.
• Work from the ledger: read run.json, write every transition.

References