AI code review pushes PostgreSQL 19 to November and sends up to ten features back to version 20

PostgreSQL 19, expected in late September 2026, will not ship until around November 19: AI-assisted code review surfaced roughly forty defects the committers could not absorb in time, and eight to ten features are being sent back to version 20. If you adopt LLM review mid-release, budget for this revert tax instead of eating it.