Lucid Train vs OpenDesign

Lucid Train is a desktop coding harness that draws architecture diagrams from a codebase and passes the diagram to a coding agent as a specification. The agent emits a semantic graph, and the ELK layout engine positions diagram elements and routes edges. Diagrams are Excalidraw scenes that can export to SVG and PNG or become Markdown specifications; Mermaid support and diagram import are also listed. Proposed edits appear as diffs, and commands use risk tiers, with catastrophic commands refused. Model options include local Ollama, OpenRouter, other OpenAI-compatible endpoints, and hosted cloud models. Repository files are processed locally; prompts and code go to the selected provider, or nowhere when using local models. The maker says it collects no telemetry, analytics, prompts, code, or usage data from local or bring-your-own-key sessions. API keys are stored locally or in the OS keychain. Connectors include GitHub, Vercel, Railway, and Grafana, plus arbitrary stdio MCP servers; remote HTTP and SSE servers cannot connect directly. The free CLI is open source. The native app costs $2.50 per month, billed $30 a year, and includes a 7-day free trial.

OpenDesign is an open-source AI design workspace that uses local coding agents to create runnable design files. It can produce prototypes, landing pages, slide decks, dashboards, brand systems, images, and HTML video, with clickable prototypes and HTML or code exports. The site lists 152+ design systems and a library of templates and skills. OpenDesign supports 17 first-party bring-your-own-key adapters, including Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot CLI, OpenCode, and Qwen. Its API can also be used with Codex, Claude Code, DSH, OpenCode, and Hermes through an OpenDesign API key. The desktop app, daemon, and skill runtime run on the user’s machine, and generated files are stored in the project directory. OpenDesign says it has no server of its own; prompts and skill context go to the provider associated with the keys the user supplies. The app supports macOS 11 or newer on Apple Silicon or Intel, and Windows 10 or 11 x64. The free plan is local CLI plus BYOK, with no recurring OpenDesign model-credit grant; paid plans start at $5/user/mo.