Pgrx

Postgres-native agent-loop runtime in Rust. Invoke an LLM agent and its tool dispatch from SQL like a stored procedure — the agent reads and writes your tables directly, with a small trait-based kernel and everything else as a plugin.

The Rust performance line for pg-raggraph: a real pgrx extension with async background-worker ingest and hybrid retrieval, plus a sidecar mode for managed Postgres where you can’t load an extension at all.

A 17× perf gap between pg-raggraph and Apache AGE turned out to be 5 lines of glue code in the bakeoff adapter, not an architectural problem. The fix, the four library-side wins still on the floor, and the three architectural directions ahead — pg_net sidecar, pgrx Rust extension, hybrid embedding tiers.