Realm

Realm, the home of AI Generated Code, is the agent sandbox component of the GSD-Core USSR Stack, which is Ultrathink, Substrate, Swarm and Realm. It runs an agent’s execution and file mutations inside a locked-down sandbox. It ships an Omp plugin, a standalone realm command-line tool with a long-running local daemon, and MCP and ACP surfaces so other agent hosts can use the same sandbox. The code is public on GitHub under AGPL-3.0-only.

No. Realm’s default advisory mode does not contain: while the realm is disconnected, the Omp guard warns and still allows host write and edit calls. Containment requires opting into the fail-closed policy. Under fail-closed, every file mutation either lands inside the realm under policy or fails closed, and the user can see whether the realm is active or disconnected for the session.

Partly. Realm is pre-release: v0.1.x is the first release line, for a milestone provisionally named v1.0. In that milestone, realm up refuses to start with the error AGENTOS_NOT_CONFIGURED until an AgentOS driver is bound, and that driver is deferred to a follow-up milestone. Podman-gated and host-gated checks still await human verification on a Podman 5.x host. You can build and test Realm from a clone with npm ci, npm run build and npm test.

Realm ships an Omp plugin that autostarts per session, and MCP and ACP surfaces over stdio (realm mcp and realm acp) that let Muse Code, Claude Code, Grok Build and Hermes Agent use the same sandbox. Per-host setup notes live in the repository’s docs, and for Claude Code the MCP route is claude mcp add realm -- realm mcp. ACP setup is not documented for every host, so check the host notes before relying on it.

Realm needs Node.js 22.13.0 or later. Linux is the only verified platform, and macOS and Windows are out of scope. The live sandbox suites need Podman 5.x, and Realm does not install or upgrade Podman for you.

Realm is licensed AGPL-3.0-only. Versions follow 0.<milestone>.<part>, and each green push to main publishes the next part as a GitHub release with a packed tarball attached. The latest release is v0.1.3, and the package is private: it is distributed as that release tarball, not on npm.

Realm is the agent sandbox component of the GSD-Core USSR Stack, alongside Ultrathink (planning), Agent Substrate (runtime, memory, skills and ledger) and Agent Swarm (the SDLC agents). Each has its own page on this site. Realm’s README does not document a runtime coupling to the other three, so treat it as a component of the same stack rather than a dependency of them.

An agent inside Realm gets 6 tools behind one frozen schema: exec, read, write, list, status and retry. Paths are workspace-relative, exec takes an argument vector first, and shell mode is gated by policy.