Notes for iPhone and Mac that ChatGPT, Claude, Claude Code and Codex can read and edit. Feels like Apple Notes, imports it too. Open source, encrypted.
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Second Brain GitHub Repositories (2026) · Open Source Tools
Discover the best Second Brain open source repositories on GitHub. Explore trending tools, live star counts, source code, and developer projects updated daily.
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22 matching projects · updated Nov 13, 2026
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Shared memory for AI coding tools: hybrid search, cited Q&A, harness memory discovery and a built-in Web console. Local index, MCP + HTTP.
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