Lucid Train
Lucid Train is a systems-design-first coding harness that generates architecture diagrams directly from your codebase.
Our verdict
Who it's for
Generate architecture diagrams from code, offline
Who should look elsewhere
Desktop app requires a paid subscription after a trial period.
Pros
- +Fully offline operation with local models ensures complete code privacy.
- +Architecture-first approach helps developers understand and document system design before coding.
- +Free CLI with no account needed, and a paid desktop app with no usage metering.
Cons
- −Desktop app requires a paid subscription after a trial period.
- −Relies on users providing their own API keys or local models for advanced features.
Key features
- ✓Architecture diagram generation from any codebase, handed to coding agents as a specification.
- ✓Multi-project workspaces with per-repo agent sidecars and history.
- ✓Reviewable diffs with risk-tiered commands that refuse catastrophic edits.
- ✓Command palette for tabs, projects, themes, and editor integration.
- ✓Support for MCP servers and SKILL.md packs from skills.sh.
- ✓Voice push-to-talk with on-device transcription and vision model image attachment.
- ✓Design mode for generating self-contained HTML from descriptions.
- ✓Dependency and MCP auditing across nine ecosystems (osv-scanner, npm, cargo, pip, etc.).
Pricing
| Plan | Price | Billing | Notes |
|---|---|---|---|
| CLI (Free) | — | month | The full agent, in one Rust binary; Local models, or your own API keys; Open source · no account needed |
| Desktop (Lucid Train) | $2.5 | month | Everything in the CLI, in a native app; Design, Diagram, Audit and Dashboards; Local models, or your own API keys |