mybrain vs second-brain

Personal knowledge base with semantic search for Claude — local PostgreSQL + pgvector, MCP server for Claude Code CLI and Claude Desktop. Inspired by Nate B Jones's Open Brain guide (promptkit.natebjones.com)

Local-first personal knowledge base CLI — hybrid FTS + pgvector search, a GraphRAG entity graph, and LLM enrichment over your notes, transcripts, Slack & Gmail. Runs fully local on Ollama (no cloud, no API keys); queryable by any AI agent through the built-in MCP server. Postgres-backed, publishes a

MCP Servers

MCP Servers

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Python

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MIT

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24

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