OKF Agent Memory implements Google's Open Knowledge Format v0.2 as git-native agent memory in pure Go, with no vector database

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This project (216 stars, on the Hacker News front page 2026-09-06) stores project memory as plain Markdown with YAML frontmatter in a knowledge/ directory, searched by in-memory BM25 and exposed through an embedded MCP server, positioning itself between ad-hoc CLAUDE.md/AGENTS.md files and black-box vector stores. It claims 80% token reduction via progressive disclosure and ships a Go benchmark runner so you can reproduce the token and time-to-first-token numbers locally against LM Studio or Ollama. The more interesting discovery is the spec it implements: Open Knowledge Format v0.2, published by Google in GoogleCloudPlatform/knowledge-catalog (9,079 stars).