Find latent bugs in a local PostgreSQL source tree (REL_xx_STABLE branch or HEAD) the way a core hacker does: build a heavily-poisoned debug instance (cassert + cache-discard + -O0/-ggdb3 + core dumps), fuzz it (sqlsmith) until the backend crashes, triage the core into a minimal reproducer (MRE), git-bisect the introducing commit, and render a community-style pgsql-bugs markdown report. The instance never auto-shuts-down. Use when the user says "find a bug in postgres", "fuzz postgres", "hunt for a crash", "test a recent commit", "write a repro", "bisect this crash", "把 PG 跑起来找 bug", "fuzz 一下 postgres", "看看这个 commit 会不会出问题", etc. Triggers whenever the user points at a PG source dir and wants to hunt bugs.