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We built a free Mermaid diagram editor with on-device AI

A free Mermaid diagram editor that renders live as you type, exports presentation-ready PNG and SVG, and writes diagrams from plain language using Chrome's built-in on-device AI. Here is the honest story of how we built it over a weekend.

Jun 189 min

OBD-II to Claude MCP architecture — car diagnostic port connected through BLE adapter and Python MCP server to Claude AI

Developer StoriesTechnology

I built a read-only MCP server for my car's OBD-II port

A weekend hack connecting a 2010 Ford Focus CC to Claude via OBD-II, BLE, and MCP. The hard part was not the AI. It was Bluetooth, protocols, and knowing when not to let the model act.

May 2510 min

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