Engines
Bring the CLI you already pay for.
The binary is already on your machine and already signed in. Nothing is proxied and no credential passes through us.
Signed & notarized by Apple · opens without a Gatekeeper warning
sha256 698955a0187bc039f4c74f5d05a9f10fbb27376a45788a0a241d1326b73873c7
$curl -fsSL https://lucidtrain.com/install.sh | sh
- Run Lucid Train on Claude CodeThe same binary you already run in a terminal, driven from a window that also has your diagrams, your dependency audit and your dashboards in it.
- Run Lucid Train on the Codex CLIJSON-RPC to a local app-server, and the only engine besides Claude Code that can also drive the design canvas.
- Run Lucid Train on the Cursor CLICursor's headless agent, with the diagram canvas and the approval gate wrapped around it.
- Run Lucid Train on OpenCodeThe open-source option, and the only engine that talks HTTP rather than stdio.
- Run Lucid Train on OpenRouterOne key, many models, and the only route here that lets you split Plan, Edit and Vision across different providers.
- Run Lucid Train on a Claude or ChatGPT SubscriptionNeither route asks you for an API key. One of them is a supported integration and one of them is interop; the difference matters.
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.
- 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.
- MCP and Architecture DiagramsYour agent supplies the structure. A constraint solver decides where everything goes.
- 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.