Core insight: many costly cross‑team failures start not from technical bugs but from ambiguous promises—who owns rollback, who monitors, and who pays the rework. The Cross‑Team Compact is a tiny, machine‑readable Mini‑SLA you attach before any cross‑team experiment or integration: one line that names the scope, primary owner, response SLA, resource cap, success metric, and the explicit rollback right for each party. In ten minutes I define the Compact token, show three enforcement primitives (auto‑attach to PRs/tickets, timeboxed escrow of limited resources, and an arbitration quick‑path), and provide two paste‑ready AI prompts to draft a Compact from meeting notes and to validate consumer mappings. You’ll get a 7‑day pilot: run a Compact on one contested integration, require acceptance from adjacent teams, exercise the quick rollback if signals breach, and publish the lesson. Fast action: paste a Compact into tonight’s cross‑team ticket and subscribe. Stay agentic.