A CI step reviews pull requests by sending all changed files to Claude in one prompt. On a 25-file PR, the first files get detailed comments and later files almost none, and a changed function signature that broke callers in two other files was missed. Which approach best fixes both problems?

Answer: B — Run a focused review pass on each file, then a separate cross-file integration pass over their findings

Per-file local passes avoid attention dilution, and a separate cross-file integration pass catches issues that only exist between files, such as a signature change and its callers. Per-file passes alone (c) miss the cross-file break, a bigger window (a) keeps the single diluted pass, and open-ended investigation (d) suits unpredictable work, not a repeatable review.