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Source changed 2026-10-03 02:22:15 UTC · snapshot created 2026-10-03 03:38:22 UTC · last check 2026-10-03 03:55:20 UTC

SYSE.30:2 - Problem

A source revision omits many influences on a build: dependency resolution, generated inputs, tool versions, platform defaults and ambient state. “Run the same command again” can reuse yesterday’s output or resolve a different dependency today. The command may succeed in both cases without reproducing the claimed artifact.

Without an explicit output and comparison criterion, a team can also confuse repeatable execution, equivalent behavior and byte identity. Each supports a different later use.