{
  "slug": "llb-adds-image-registry-and-oci-layout-raw-blob-sources-271bc78842e1",
  "title": "LLB adds image registry and OCI layout raw blob sources",
  "tools": [
    "buildkit"
  ],
  "tags": [
    "agent"
  ],
  "introduced_at": "2026-03-04T00:45:05.000Z",
  "announced_at": "2026-03-04T00:45:05.000Z",
  "effective_at": null,
  "date_basis": "source-publication",
  "status": "unknown",
  "how": {
    "incantation": "When an LLB definition needs one raw blob from a container image registry or OCI layout, use the matching blob source. It downloads the blob as a single file into an empty snapshot.",
    "examples": [
      "blob := llb.ImageBlob(\"<registry>/<repository>@sha256:<digest>\", llb.Filename(\"<filename>\"))",
      "blob := llb.OCILayoutBlob(\"<repository>@sha256:<digest>\", llb.ImageBlobOCIStore(\"\", \"<store-id>\"), llb.Filename(\"<filename>\"))"
    ],
    "gotchas": [
      "Version: v0.28.0",
      "reference (required): Blob reference in the form <registry>/<repository>@sha256:<digest> for a registry source, or <repository>@sha256:<digest> for an OCI layout source.",
      "llb.Filename(\"<filename>\"): Sets the downloaded blob's filename.",
      "llb.ImageBlobOCIStore(\"\", \"<store-id>\") (required): Selects the OCI layout content store by ID for the OCI layout source.",
      "Prerequisite: The source types were added in BuildKit v0.28.0.",
      "Prerequisite: For OCI layout sources, register the OCI content store in the LLB solve options using the same store ID."
    ]
  },
  "why_it_matters": "Define an LLB source that reads a raw blob from an image registry or OCI layout.",
  "sources": [
    "https://github.com/moby/buildkit/releases/tag/v0.28.0",
    "https://github.com/moby/buildkit/pull/4286/files"
  ],
  "rank": 0.94025,
  "judge": {
    "publish": true,
    "judge_model": "codex-cli/gpt-6-luna+typesafe/jev-1.13.0",
    "prompt_version": "extract-v7+enrich-v2+judge-v2x3+jev-publish-v1"
  },
  "review_state": "approved",
  "provenance": {
    "run_id": "wave1b-20261016",
    "verdict_id": "wave1b-20261016:wave1b-20261016-a27af3dcbf06c191-4:gate",
    "evidence_hash": "0acf7129aa3c7c725471a92b49c03729ec93221224dbcb1d14f467f2f038798d"
  },
  "review": {
    "draft_hash": "7fdfc30181db1ce19135fb8ad1f6811dd4582aa5110f57e8ae295acedfe60369",
    "reviewer": "publication-gate",
    "reviewed_at": "2026-10-07T00:00:00.000Z",
    "decision": "wave1b-20261016:gate",
    "reason": "3 of 3 judge runs approved with p_yes >= 0.9 (mean 0.94 >= 0.9; 2 needed) and Jev gave 0.61 (>= 0.6 needed)."
  }
}