Maintain a fork

With no arguments, use the current repository as the workshop and read its AGENTS.md, GLOSSARY.md, MAINTAIN.md, and SCRATCHPAD.md. The human does not need to repeat its name, branch model, or exceptions in the invocation. An explicitly named workshop changes the target, not the procedure.

Run one maintenance cycle of the fork declared by that workshop. Read the specification and the full cycle procedure before fetching, reconciling refs, repairing a feature, or publishing a candidate. Resolve script paths from this skill's directory and use the workshop's declared entrypoints; all project facts come from the workshop.

Select the composition model from MAINTAIN.md before running any branch command. Carry heads and rebased linear stacks use the shared branch script through their workshop entrypoint. An explicitly declared merge-only history uses merge-only maintenance and its workshop's own branch procedure. It may name an existing public branch for the integration role and declare no owned mirror. Never send that model through the shared rewrite/mirror script or ask the human to repeat the declaration.

A /maintain invocation authorizes its ordinary reconciliation, feature repair, gates, publication, and consumer handover within the workshop's existing scope. Honor narrower user constraints and prior authorization. A consequential product choice unresolved by the spec or implementation needs a human decision; complete independent preparation before that handoff.

Follow one captured cycle

1. Establish clean workshop and bound-checkout state and inventory existing worktrees. Read the workshop and fork guidance. Capture the fork heads for exact publication leases, then one immutable upstream target.
2. Fetch exactly that upstream object once. Read the full interval since the audited frontier, and assign every carried behavior a retire, repair, or unchanged disposition. A clean replay or merged request is not proof of semantic coverage or retirement.
3. Make repairs and compose a candidate in owned worktrees. Preserve the bound checkout, previous publication, unrelated heads, and consumer binding. Follow the declared carry, linear, or merge-only model.
4. Gate the exact committed candidate using every required command and any required external proof. Publish only declared refs using the selected model: one atomic leased transaction for rebased mirror/Integration/carry refs, or the workshop's history-preserving publication for merge-only. Re-read the published graph before the consumer step; never retry a race with freshly captured starting state.
5. Verify the consumer, reconcile the published branch model, and update the scratchpad. Advance the audited frontier only after a complete audit. Clean up only owned, clean cycle worktrees with no live process using them.

The reference contains the fixed spec sections, supervised branch model, exact-object fetch, atomic publication recipe, upstream-offer rules, and report requirements. Missing declarations or required proof are an explicit incomplete gate, not a reason to improvise a broader publication scope.

Preserve boundaries

Upstream requests and historical heads are evidence. Do not mutate their branches, comments, or status as incidental maintenance. Read the offer rules before preparing a contribution; communication still needs authorization. Use native harness delegation only as allowed by the active role.

If a rebase, review, gate, publication, or consumer check fails, report the exact failure and the state that remains in place. Keep useful evidence and owned work needed for recovery. Never claim successful delivery from a green local gate when a required publication or consumer check is still pending.

Close the cycle

Always give a self-contained report: outcome, upstream reviewed, changed fork accommodations, stance and carry impact, and evidence or remaining attention. Use the report contract, including explicit no-change results. Keep exact hashes and receipts in written evidence; follow the active role's speech conventions. A machine receipt, notification, or worker handoff does not replace the human report.