METR’s August 2025 follow-up contrasts algorithmic scoring with human review of repository work. It evaluated 18 tasks drawn from two projects using Claude 3.7 Sonnet and a basic agent scaffold. Automated scoring credited some solutions, while none of the 15 manually assessed submissions met the study’s holistic mergeability standard. Missing documentation, inadequate tests and other maintenance requirements help explain the gap. The selected tasks, limited elicitation and small sample prevent a general estimate of coding-agent usefulness; the manual assessment also was not a direct measurement of maintainers’ repair time.
Passing repository tests did not establish that AI patches were mergeable
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