dashboard@4a00e2eaa9fb

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 9bee6617c964. 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 (30.5 KiB) — no SBOM: the build did not pass --sbom=true.

It belongs to dashboard:main, dashboard:main-2b5ae4b, dashboard@96a78a6b3cb0, 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@sha256:4a00e2eaa9fb2b90db181813e8b6e2ef0cd604468e833f0b7e3d9f262f617209

Digest: 4a00e2eaa9fb2b90db18
Media type: application/vnd.oci.image.manifest.v1+json
Platform: none — attestation entry (unknown/unknown)
Total size: 30.5 KiB
Pushed: Oct 20, 2026byGitHub Actions · tund/github-ci

Cargo plan

1 layer30.5 KiB

#	Instruction	Digest	Shared	Size
1	`—`	4445e79ff71d	unique	30.5 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": "sha256:4445e79ff71dc9d239fe8a2022731b7610816e867d30326569fc3b960a07663b",
      "size": 31184,
      "annotations": {
        "in-toto.io/predicate-type": "https://slsa.dev/provenance/v1"
      }
    }
  ],
  "subject": {
    "mediaType": "application/vnd.oci.image.manifest.v1+json",
    "digest": "sha256:9bee6617c9644e81b029ca589583b905c217b988d5e55225aa40c9f814de9f60",
    "size": 1813
  }
}