Chroma

Chroma is the thing people actually reach for. Fifteen million downloads a month, 27,000 stars, and a place in 90,000+ codebases — not because anyone sold it to them, but because it is the shortest path from "I have documents" to "my model can find them." Now it is aiming at something bigger than retrieval: the memory layer agents run on. Jeff Huber and Anton Troynikov have built the rare piece of infrastructure developers describe with affection.