Catching Bugs Before They Land: JiTTesting’s Human-on-the-Loop Approach at Full Scale

Meta has moved Catching Just-in-Time Tests (JiTTests) from research prototype into production, where LLMs generate tests for each code change before it lands. Two workflows, one intent-aware and one treating every diff as a suspected bug, produce candidate failures that are filtered by an LLM ensemble and a rule-based assessor…