Sealant Documentation

Sealant is an open-source, self-hosted runtime for agentic development. It gives coding harnesses a real, disposable development environment to work in — a workspace — and turns every harness execution — a run — into a durable, replayable execution record. You run it on your own infrastructure; your code never leaves it.

Start here

• Install Sealant — one command, needs only Docker with Compose v2:

  curl -fsSL https://get.sealant.dev | sh

• Create your first workspace — sign up in the web app, add an SSH key, build a workspace around a real repository, and SSH into it.

Learn the system

• What is Sealant — the model, who it's for, and what it deliberately is not.
• How Sealant works — the services a self-hosted install runs and how a workspace request flows through them.
• What ships today — an honest status table of every surface: shipped, preview, or planned.

Go deeper

• Guides — connect the GitHub App, SSH into workspaces, create workspaces, runs and execution records, upgrade, repair, uninstall.
• Reference — environment variables, ports and data, the HTTP API, the SDK, and the CLI.
• Concepts — workspaces, execution records, harnesses, the security model.
• Contributing — work on Sealant itself.