MCP
Diagrams over MCP.
Your agent supplies the structure. A constraint solver decides where everything goes.
$curl -fsSL https://lucidtrain.com/install.sh | sh
- Architecture Diagram MCP ServerPoint your existing agent at it and get diagrams that a solver laid out rather than a language model.
- Architecture Diagrams in Claude CodeKeep working in Claude Code and get a diagram that a layout solver produced.
- Architecture Diagrams in CursorStay in the editor, get a diagram a solver arranged.
- draw.io MCP Server AlternativeThe difference is who decides where the boxes go.
- Excalidraw MCP Server AlternativeSame format, no lock-in, and a solver does the arranging.
- MCP ConnectorsRegistry search or a command and some environment variables. Anything that speaks stdio.
Elsewhere
- System Design TemplatesEach template is a real diagram produced by the same layout engine the app runs, not a picture of one.
- AI System DesignThe diagram can cause the code, not just describe it.
- Harness EngineeringAgent equals model plus harness. The harness is the half you can actually change.
- Coding Engines Lucid Train Can DriveThe binary is already on your machine and already signed in. Nothing is proxied and no credential passes through us.
- Dependency and Agent Supply Chain AuditYour packages are audited by everyone. The programs your agent launches are audited by almost no one.
- Grafana and Observability in a Coding AgentNothing is exported to us. It reads the Grafana you already run, with your credential, on your machine.
- AI Design Mode for Web PagesRunning on the Claude Code or Codex CLI you already have, with your repository open beside it.
- Software Architecture GlossaryWhat each term means, where it came from, and where it stops being useful.
- Guides to Choosing Architecture ToolsNo winner is declared, because the right answer depends on constraints a web page cannot see.
- Alternatives to Popular Diagramming and Agent ToolsEach page sorts the field by the reason you are leaving, because that is what decides the answer.
- Generate a Diagram from Your CodeEvery source below lists the exact files it reads and the constructs it maps to diagram nodes.
- AI Diagram GeneratorsThe agent emits a semantic graph and ELK computes the layout, so overlapping boxes are structurally impossible.
- Compare Lucid TrainEvery page says what the other tool is better at. If that section were empty the comparison would not be worth reading.
- Convert Code and DiagramsEvery conversion page states what survives the round trip and what does not.
- Use CasesEach page includes who it is not for, which is usually the more useful half.
- Beyond DiagramsDiagrams are the front door. These are the rooms behind it.