How I built local-first memory for Claude Code, Cursor, and Codex - 94.5% LoCoMo recall@10, 70ms p50

This story was originally published on HackerNoon at: https://hackernoon.com/how-i-built-local-first-memory-for-claude-code-cursor-and-codex-945percent-locomo-recall10-70ms-p50. Open-source local-first memory for Claude Code, Cursor, Codex via MCP. 94.5% LoCoMo recall, 70ms p50, no API keys. Five techniques explained with code. Check more stories related to programming at: https://hackernoon.com/c/programming. You can also check exclusive content about #open-source, #ai, #programming, #machine-learning, #python, #large-language-models, #mcp, #developer-tools, and more. This story was written by: @oleksiijko. Learn more about this writer by checking @oleksiijko's about page, and for more stories, please visit hackernoon.com. PMB is an open-source MCP memory server for Claude Code, Cursor, and Codex. It runs 100% locally (SQLite + LanceDB), needs zero API keys, and hits 94.5% LoCoMo recall@10 at 70ms p50 - matching or beating cloud alternatives like mem0, Letta, and Zep. This post walks through the five techniques behind it: predicate-aware reranking, verb synonym expansion, no-LLM atomic fact extraction, pattern query splitting, and a durable async embed queue - with the actual code from the repo.