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Preview.6 release contract

Invitation-only preview: use v0.1.0-preview.6 only when its non-draft GitHub prerelease provides the Linux/x64 archive and checksum together with the immutable image matrix in RELEASES.md.

Docker image-store compatibility

Preview.6 fixes the runtime identity boundary exposed by Docker's two image stores. Classic Docker reports the image configuration digest as .Id, while Docker's containerd image store may report the OCI manifest digest. Those local values are not portable configuration.

Provider policy, Control tasks, and Docker create/inspect now bind the complete canonical repository@sha256:manifest reference. The runtime accepts the image only when Docker resolves that exact reference to either the same manifest ID or an exact RepoDigests entry, and container readback must bind the same reference plus Docker's resolved local ID. A mutable tag, bare repository, wrong registry digest, or mismatched container readback fails before execution.

Compatibility and retained behavior

  • Preview.6 keeps the Preview.5 Buyer and Provider command surface.
  • CPU-only, single-GPU, and atomic 2–8 GPU offers remain supported.
  • SAME_NODE and P2P_REQUIRED retain their Preview.5 meanings.
  • The CUDA compatibility class and immutable validation/workload image manifests are unchanged.
  • Existing Preview.5 configuration that copied Docker-local image IDs must be replaced with the exact registry references in PROVIDER.md before setup or serve.

No release claim is made from source alone. Installation is supported only from the published archive after verifying SHA256SUMS.