Feather is context infrastructure for AI agents: adaptive memory, a semantic graph and sub-millisecond retrieval, shipped as a single .feather file with zero servers. It is open source under MIT, built on a custom Rust and C++ engine, and retrieves in 0.3ms at 10K vectors and 9.8ms at 10M. Memory ages through recall-based stickiness and time decay rather than sitting static. Feather i... https://hawky.ai/blog/ai-ad-intelligence-tools