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Every PR merged green, yet main breaks twice a week. What does introducing a merge queue actually change?

Green PRs can still break main because they were validated against a stale tip. Merge queues revalidate the exact combination that lands, trading extra validation work for coverage of combined changes.

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Green PRs can still break main because they were validated against a stale tip. Merge queues revalidate the exact combination that lands, trading extra validation work for coverage of combined changes.

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