pg_pipeline

https://github.com/roman-haidarov/pg_pipeline

A driver-adjacent Ruby control-plane over ruby-pg/libpq. It multiplexes independent, session-neutral extended-protocol operations from many Async fibers onto a small number of PostgreSQL connections while keeping explicit transactions and session-changing work on exclusive pinned connections. Control-plane only: all wire work stays in libpq. Zero lines of C.