Ruby gem written and maintained by Stephen Margheim that automatically patches a Rails application's SQLite configuration to be production-ready. Applied by `bundle add`: sets up initializers that switch Active Record to immediate-mode transactions, install a GVL-releasing Ruby busy_handler, apply a fair 1 ms retry interval, and wire up optional isolated reader/writer connection pools (opt-in, marked experimental as of March 2024). Also backports SQLite-adapter features from rails main that hadn't yet shipped in a point release: deferred foreign keys (for circular references), virtual columns, custom returning values on insert, declaring SQLite pragmas in database.yml, and loading SQLite extensions (e.g. a vector-similarity extension) via database.yml.