Summary & Key Takeaways ​

• The signed shared-artifact cache is now horizontally scalable with S3-compatible storage.
• The experimental shared-artifact protocol is generalized to identify discriminated subjects.
• Published build artifacts are now immutable; publishing a different one over an existing key results in a 409 Conflict.
• Immutability applies to every consumer an artifact can reach, preventing later builds from taking precedence.
• pnpr reclaims unreferenced shared artifact blobs after ambiguous object-storage write failures.
• pnpm install --fix-lockfile now regenerates broken lockfile metadata while preserving compatible locked versions.

Our Commentary ​

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