Can Your AI Analyst Keep a Secret? - Aaron Linsky, Bridgewater & Nikhil Benesch, turbopuffer

An AI analyst at a firm like Bridgewater needs private documents, but every email, memo and research note carries its own permissions. Aaron Linsky (head of product engineering, Bridgewater Associates) explains why the Vault's 100 million permissioned documents broke their first search setup, and Nikhil Benesch (CTO, turbopuffer) breaks down the fix: post-filtering loses recall, pre-filtering is too slow, and "native filtering" over a clustered vector index gets both, delivering about 120ms P90 searches across 400 million vectors. Chapters 00:00 Intro: why permissions matter for AI analysts 02