INDEPENDENT DEVELOPER / AI / OPEN SOURCE

Building products and sharing the work.

Building AI products, open source tools, and sharing lessons from indie development.

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MandarinClips

Chinese learning through movies.

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IndexFlow

Open source SEO/GEO indexing infrastructure.

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AgentBridge

MCP bridge for AI coding agents.

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ABOUT

Sanfeng's developer lab

A long-term home for product experiments, engineering practice, open source work, and notes from building independently.

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