Testing & QA Agent Skill

Pick the right PostgreSQL test flavor for a core / contrib patch — covers pg_regress .sql / .out pairs, isolationtester specs and permutations for concurrency / deadlock races, TAP (PostgreSQL::Test::Cluster) for multi-node and pg_basebackup / replication / recovery scenarios, and src/test/modules for in-tree C test modules. Spans where test files live, how to wire them into the right schedule / meson.build, and how to run a single test fast (REGRESS_OPTS, --temp-instance, PROVE_FLAGS). Use whenever adding tests to a PG patch, reviewing a patch's test coverage, picking between regress / isolation / TAP for a new feature, debugging a regression diff, or asked "where should the test for X live". Skip for pytest / unittest / Jest / Vitest / Mocha / RSpec / JUnit / Go testing / Rust cargo-test app testing, pgbench / sysbench / HammerDB performance benchmarking, end-to-end / Selenium / Playwright web testing, and load / stress testing of production PG.

A minimal skill for testing