theokit-sdk

Open-source TypeScript SDK and agent runtime you own end to end. Agent.create / prompt / stream / resume, 43 LLM providers on your own keys, MCP with OAuth PKCE, subagents, workflows, evals, memory, and a bubblewrap+seccomp kernel sandbox for tool execution. Local-first, opt-in cloud, Apache-2.0.

GitHub

Official source

Start locally with the CLI guide