Cross Review Use this skill to hand a plan or an implementation to other agent CLIs (by default the opposite CLI and Antigravity) for an independent, read-only review. The host agent prepares a self-contained brief, the bundled runner starts the reviewer with a fixed read-only policy, and the host passes the result to as claims to validate. Responsibility boundary This skill owns the path from a review need to an external reviewer's result: It does not fix findings, decide whether they are valid, run , or finish a branch. Two modes exist: - - review an implementation plan against its spec bef…