The git/GitHub side of the task lifecycle, bundled as skills: the advanced procedures (git-github-advanced — commit layering, squash-merge recovery, CI-trigger rules, merge-relocation traps) and the owner's merge command (merge-to-main — "LGTM").
No prose and no checks of its own — the lifecycle checks (task-lifecycle,
squash-merge-history) stay in basics. Every repo gets this pack through basics's
requires closure (materialized into declarations at --init and the baselining backfill),
never by direct seeding.