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Object Versioning and Overwrite Semantics as a Reproducibility Anchor

The outcome requires a result someone else can re-derive from the recorded inputs; a mutable key makes 'the inputs' a moving target and quietly invalidates the claim. Versioning versus immutable write-once keys is a real design trade with cost consequences, which keeps it analysable rather than a switch to flip.

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Preserving and Restoring Object Versions with Amazon S3 Versioning

Object versioning in Amazon S3 is a bucket-level property that changes the write semantics of an object store from destructive overwrite to immutable append: a PUT to an existing key mints a new obje…