X_SCRAPE_YIELD_COLLAPSED

the run succeeded and returned far too little

terminal, and the silent-green alarm. Two triggers: fewer rows than expect.minRows, or a fall past expect.maxDrop against the trailing median of the last expect.window runs (default 7, and no baseline below 3 samples). A run that succeeds and returns nothing is the worst failure a scraper has, because it stays green. A collapsed run is deliberately not recorded — check, then record, and record only a run that passed, or three broken runs at 2 rows make the median 2 and the alarm silences itself exactly when it was working

open the run's page.html artifact and compare it with the extract selectors — a collapse is the page changing far more often than the data changing