What Is the ADE?
The Agent Development Environment (ADE) is a local-first web UI for managing your Letta agents. Chat with them. Create and configure them. Assign tools. Inspect memory. All from a browser, pointed at your own Letta server.
We're building it because the agent management layer is a critical gap in the self-hosted Letta experience. Letta provides the framework and the API; SMCP provides the tools; Broca provides the messaging layer. But there's no lightweight, open-source UI that ties it all together without depending on a hosted service. The ADE is that missing piece.
Where It Stands
The ADE is under heavy active development. We're treating it as a primitive — a foundational building block that will mature through use rather than a polished product you install on day one. Current capabilities include:
- Agent CRUD: create, configure, and delete agents with model selection, system prompt editing, and tool assignment.
- Chat interface with markdown rendering, tool call visualization, and reasoning display.
- Full Letta API coverage for agents, tools, MCP integrations, and health checks.
- Multiple deployment targets: a zero-dependency HTML/CSS/JS version that runs on anything (including a Raspberry Pi or Android phone), and a Vite+React version for the full experience.
- Responsive layout, PWA-ready.
We're Looking for Contributors
The ADE repo is currently private, but we're actively inviting contributors who want to help shape what agent management looks like in a self-hosted world. If you're interested in working on:
- Frontend development (vanilla JS or React)
- Letta API integration and testing
- Accessibility and responsive design
- Documentation and onboarding flows
...reach out. We'll add you to the repo and get you oriented. The architecture is intentionally simple (static files that talk to the Letta API) so the onboarding curve is shallow. This is an opportunity to help build a foundational piece of the SanctumOS stack while it's still early enough to influence its direction.