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StructSmith
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StructSmith

Active·★ 26·MIT·Updated 2026-10-20

StructSmith is a local-first, open-source tool for modeling software architecture, offering a modern React Flow editor and built-in MCP for AI client integration. It allows users to model, document, and share software architecture with AI assistants, providing a self-hosted alternative to Structurizr.

#Software Architecture#C4 Model#Architecture Diagramming#AI Integration#Local-first#Open Source#Dev Tooling
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#Model Context Protocol (MCP)
$ Install
$ docker run -d --name structsmith -p 127.0.0.1:8090:8080 -v structsmith-data:/data --restart unless-stopped ghcr.io/dziksu/structsmith:latest
↗ Visit site★ GitHub
01

Features

01Local-first, open-source, MIT licensed with no accounts or telemetry, working fully offline.
02Modern React Flow editor for visualizing and laying out semantic architecture models.
03Built-in Model Context Protocol (MCP) for seamless integration with various AI clients.
04Support for C4 model elements, relationships, views, and semantic nested boundaries.
05Import existing Mermaid diagrams and export to JSON, Mermaid, PNG, or SVG formats.
02

Compatibility

Docker
Deployment
Verified via docs
Bun
Runtime
Verified via docs
SQLite
Database
Verified via docs
AI Clients (via MCP)
Integration
Verified via docs
03

Quick start

1
$ docker run -d --name structsmith -p 127.0.0.1:8090:8080 -v structsmith-data:/data --restart unless-stopped ghcr.io/dziksu/structsmith:latest
04

Use cases

↳Designing and documenting software architecture, including using the C4 model.
↳Facilitating architecture workshops and designing system integrations.
↳Collaborating on architecture work with AI assistants.
↳Creating presales and solution architecture diagrams.
↳Documenting existing systems and their components.
05

Alternatives

⚡Top VS:
VSstructurizr★484→VSglade-mcp★214→VStiger-cli★126→

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dziksu /
StructSmith
↗

Local-first, MCP-native tool for modelling software architecture. C4-style semantic model, React Flow editor, SQLite, single container — a self-hosted Structurizr alternative your AI client can edit over MCP.

26MIT
Last commit3d ago
StatusActive
CategoryDev Tooling
Links
Documentation↗Discussion↗Issues↗Releases↗
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