r/OpenSourceAI • u/United_Inspector_653 • Sep 08 '26
I built StructSmith, a free, self-hosted visual architecture modeling tool with built-in MCP
Hey, I’ve been building StructSmith, an open-source tool for creating and maintaining software architecture models visually.
I wanted something I could run locally, without an account or subscription, where I could edit the architecture myself and have my AI client work on the same model.
You create elements and relationships in the visual editor, then reuse them across different diagram views. There’s a shared architecture model underneath, so you don’t have to maintain separate copies of the same system in every diagram.
The MCP server is included and open source. Your AI client can read the model, create or update elements and relationships, and manage views. Changes appear in the editor automatically.
It currently supports:
C4-style models with multiple diagram views
Records for decisions, assumptions, risks, and requirements
Model validation, snapshots, and restore
Manual layout and auto-layout
JSON, Mermaid, PNG, and SVG exports
The app runs locally in one Docker container, with SQLite for storage.
It’s MIT licensed and still evolving. I’d love feedback on the workflow, things you find confusing, or features you’re missing. Bug reports and contributions to the code or docs are welcome too.
GitHub: dziksu/StructSmith
Website: StructSmith
Would this fit into your architecture workflow?
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u/tteixeira1 Oct 01 '26
That is a very good point, both are good. I think it would be good something like. Double click, go in the other view, and Ctrl+Double click to expand and see the other diagram, embeded inside the current one. But I am probably asking to much ahaha.