Scion

Scion is an open-source orchestration platform from Google Cloud for teams of AI agents and the people working with them. It runs existing harnesses such as Claude Code, Antigravity, Codex and OpenCode as independent processes with per-agent configuration and credentials, in shared workspaces or separate Git worktrees, and lets agents delegate tasks, message each other and work in parallel locally or on cloud infrastructure. It offers a CLI, a Workstation web UI and a hosted Hub, a Skill Bank for versioned skills, harness configuration bundles and an A2A bridge. Agents learn the scion CLI through skills.