Use when the user asks for Gemini's review of a generated artifact (plan, spec, markdown doc, HTML spec, report, implementation plan) with phrases like "get Gemini's take", "send to Gemini for review", "what would Gemini say about this", "run it through Antigravity", "send to agy". Also offer proactively after generating a substantial plan, spec, or report ("want me to send this to Gemini?"). Grounds the review in the current project's own CLAUDE.md/conventions and the artifact's cited sources. Returns raw Gemini feedback for manual triage; never auto-edits the artifact. Requires the `agy` CLI (Google Antigravity, the successor to the retired `gemini` CLI).
