Built a PostgreSQL extension with two use cases:

1. Privacy: Train LLMs without leaking customer names Hash identities before training. Model learns patterns, not people. Use case: Healthcare SaaS training on patient records (HIPAA safe)

2. RAG billing: Charge per-document retrieved instead of flat subscriptions The "Spotify model" for knowledge bases Use case: Legal databases charging $0.25/case vs $10k/year unlimited

Pure SQL. 30-second install. MIT license.

Looking for feedback from anyone building RAG systems or training AI on sensitive data.