Lucid Train
Build system design for new and existing codebase
Lucid Train launched on August 24, 2026 with 114 votes, #302 of 23,274 launches that month and more than 95% of that year's launches.
In plain words
Lucid Train generates architecture diagrams directly from a codebase and passes them to a coding agent as specifications for building or modifying systems. It runs entirely offline using local models on a desktop app or 6 MB Rust binary, supporting multiple repositories simultaneously with version control tracking. The tool integrates with VS Code, Cursor, and Zed, includes voice commands with on-device transcription, and supports image uploads for vision models. It is designed for developers working on system design and codebase architecture tasks.
written from the facts on this page · September 2026
From the sources
Lucid Train generates architecture diagrams from your codebase, then hands the diagram to a coding agent as a specification. Local models, fully offline.
Point it at your repo and it draws the architecture, then hands that diagram to the coding agent as a specification. Desktop app or a 6 MB Rust binary. Your models, fully offline. One request goes through a small orchestrator, comes back as an architecture drawing, and leaves as the spec the coding agent builds from. Several repos at once, each with its own agent sidecar and history. Every edit lands as a diff. Commands are risk-tiered; catastrophic is refused. Push-to-talk with on-device transcription. Attach images for vision models. One identity in both schemes. Opens VS Code, Cursor or Zed in a click. Describe a page, get self-contained HTML. Click one element to rewrite only it.…from lucidtrain.com
Pricing, as stated on its site
Free tier, paid plans from $2.5/mo — CLI is free and open source. Desktop app costs $2.50/month (billed $30/year) with a 7-day free trial. All model usage is separate and billed by the provider directly, not by Lucid Train.
checked September 2026 · prices change
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