Scion

Scion is an experimental multi-agent orchestration testbed built by Google Cloud Platform that manages "deep agents" running in isolated containers. It orchestrates agents like Claude Code, Gemini CLI, Codex, and others as concurrent processes, each with its own container, git worktree, and credentials. Rather than prescribing rigid orchestration patterns, Scion takes a "less is more" approach — agents dynamically learn a CLI tool, letting the models themselves decide how to coordinate. It supports local execution, remote VMs, and Kubernetes clusters.

• Harness Agnostic — Works with Gemini CLI, Claude Code, OpenCode, and Codex; adaptable to anything that runs in a container.
• True Isolation — Each agent runs in its own container with separated credentials, config, and a dedicated git worktree, preventing merge conflicts.
• Parallel Execution — Run multiple agents concurrently as fully independent processes, locally or remotely.
• Attach / Detach — Agents run in tmux sessions for background operation; attach for human-in-the-loop interaction and tunnel into remote agents securely.
• Specialization via Templates — Define agent roles such as "Security Auditor" or "QA Tester" with custom system prompts and skill sets.
• Multi-Runtime — Manage execution across Docker, Podman, Apple containers, and Kubernetes via named profiles.
• Observability — Normalized OTEL telemetry across harnesses for logging and metrics across agent swarms.
• Hub-Based Orchestration — Optional central control plane for multi-machine orchestration via a Hub and Runtime Broker model.
• Quick Install — Install from source with go install github.com/GoogleCloudPlatform/scion/cmd/scion@latest, then run scion init in your project directory.