AGENTS.md gets the "State syncs; reactions don't" section under Syncing
boards — the actor-only rule, the file-carried backstops behind it, and
the two consequences you can see (a half-done side effect is nobody's to
finish automatically; ownership gates work launches). The Pull requests
section says which board opens one and how ↑ open PR asks afterwards, the
card-actions list gains ▸ take over and ↑ open PR, "Claiming a card" stops
saying the claim refuses nothing, and the merge & clean up paragraph
documents the origin-side merge — including the constraint the local path
hid: whoever clicks needs merge rights on the repo, not just push rights.
.env.example: BOARD_COMMIT_MOVES documents the claim as a launch gate,
BOARD_SYNC the actor-only reactions and the origin-side merge.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
