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A Default Return Is a New API: Reviewing Agent PRs That Swallow Failures

This story is from 2026-09-13. It is preserved in the archive; the latest stories are on the live feed.

Agent-generated pull requests often look correct because they stop throwing. That is the defect. When a helper that used to raise KeyError , TimeoutError , or PermissionError starts returning [] , None , or 0 , callers inherit a new API without a version bump. This note is a review workflow, not a…

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  1. 2026-09-13 20:54 · DEV Community — AI
    A Default Return Is a New API: Reviewing Agent PRs That Swallow Failures

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