dashboard@82acd6f94699

This is not an image: it is a BuildKit attestation entry of a multi-arch index.

docker buildx stores the attestations it generates as an extra entry of the index, with the placeholder platform unknown/unknown, describing the variant 84875b77dd19. It appears whenever a build records provenance — on by default since Docker 24 / buildx 0.11 — or an SBOM (--sbom=true); images built with plain docker build or with --provenance=false have no such entry. docker pull never fetches it by itself; docker buildx imagetools inspect and docker sbom read it.

This entry contains: SLSA provenance v1 (27.7 KiB) — no SBOM: the build did not pass --sbom=true.

It belongs to dashboard:0.7, dashboard:0.7.5, dashboard@941e16187d7d, so it cannot be deleted on its own: removing it would break that index. Delete the tag or the index and the next prune untagged run (or a retention policy) removes this entry; garbage collection reclaims its bytes.

To build without attestation entries: docker buildx build --provenance=false --sbom=false …

docker pull chicor.ee/tund/dashboard@sha256:82acd6f94699b28a6896e5f378e67153bd9c72563851196890d2590327621fd5

Digest: 82acd6f94699b28a6896
Media type: application/vnd.oci.image.manifest.v1+json
Platform: none — attestation entry (unknown/unknown)
Total size: 27.7 KiB
Pushed: Oct 6, 2026byGitHub Actions · tund/github-ci

Cargo plan

1 layer27.7 KiB

#	Instruction	Digest	Shared	Size
1	`—`	e2fdfbf58956	unique	27.7 KiB

{
  "schemaVersion": 2,
  "mediaType": "application/vnd.oci.image.manifest.v1+json",
  "artifactType": "application/vnd.docker.attestation.manifest.v1+json",
  "config": {
    "mediaType": "application/vnd.oci.empty.v1+json",
    "digest": "sha256:44136fa355b3678a1146ad16f7e8649e94fb4fc21fe77e8310c060f61caaff8a",
    "size": 2,
    "data": "e30="
  },
  "layers": [
    {
      "mediaType": "application/vnd.in-toto+json",
      "digest": "sha256:e2fdfbf58956ef79258ed8d7c5c71d32b6576f6b082606a59e052ae43b9dd3ef",
      "size": 28402,
      "annotations": {
        "in-toto.io/predicate-type": "https://slsa.dev/provenance/v1"
      }
    }
  ],
  "subject": {
    "mediaType": "application/vnd.oci.image.manifest.v1+json",
    "digest": "sha256:84875b77dd1914fcf4d2ba98f7bb0f3c9ad28c360db5126426cbf5261750b725",
    "size": 1813
  }
}