Build knowledge agents without embeddings

Vercel released an open-source Knowledge Agent Template that replaces vector/embedding pipelines with a filesystem + bash approach, giving agents direct file access via grep and directory navigation. The architecture reduced per-call costs from ~$1.00 to ~$0.25 on their sales call summarization agent while improving output quality. Built on Vercel Sandbox, AI SDK, and Chat SDK, it supports plugging in GitHub repos, YouTube transcripts, markdown docs, and custom APIs.