init

Opt-in onboarding for the mARC agent team. Scaffolds a per-repo team binding so the team graduates from ephemeral session-memory to persistent, versioned config — without ever writing a file silently. Discovers the repo's org/repo/ project at runtime via gh, prefills .agents/team.toml, and (optionally) a lean AGENTS.md skeleton and the enabledPlugins pin in .codex/settings.json. Each artifact is independently opt-in and is shown to you before anything is written. Invoke with /marc:init.