StructSmith

Local-first, MCP-native tool for modeling software architecture diagrams

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StructSmith is a local-first, self-hosted tool for modeling software architecture as C4-style diagrams, with a visual React Flow editor and SQLite storage packaged in a single container. It's built as an open alternative to Structurizr that an AI coding agent can also read and edit directly over MCP, aimed at software architects and developers documenting system design.

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