Notes from the workbench

Memory you can defend, measured in public.

Technical notes on building trustworthy agent memory on PostgreSQL and pgvector: validity, supersession, calibration, abstention, and the measurements behind each claim. Subscribe with the Atom feed.

• 2026-08-23

  The retracted claim is the nearer match

  Agent memory that keeps its history holds both the claim and the correction, and on cosine similarity the retracted claim often wins. One pair of memos from the shipped demo corpus shows the failure exactly, and why no ranker fixes it.