{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "039b3d60a9eaa71a7b6ad396a7eb82948b1fa2aa63e08cc326827b37f0e908db",
  "signature": "pPXFEo7wfa3fS8RtVddc8L9ha8gp4rfqAc8YmVQjzUioOHlan/XiSMhomwVT/c3KtGzPZsB8ubnXjiKqwNeeBA==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T02:02:22.774Z",
  "slug": "retail-promo-planner",
  "version": "0.1.0",
  "filename": "retail-promo-planner-agent-plugin.zip",
  "bytes": 3537,
  "content_digest": "521406aadfd1699f60d86cf8e18a842a5895e8c529059bc653ebbbd2fd283566",
  "content_signature": "5nE28LZku0I/Ub/n6KCkxuhVnzBkvi7GR4B8NR3wLBjkFd6wPJEswWd5JO04RGQzhUsNHkhP1tJnQEiKudq0AA==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "dc68ec4e8fbfb58ee99ca73b460c247e9c60bc683ef371a4478b9086f070abb7"
    },
    {
      "path": "skills/retail-promo-planner/SKILL.md",
      "sha256": "6b33fb30645b6534c7ecd5e080489454a3f600fe5e421cc90fc911d3103e98d0"
    }
  ],
  "verify": {
    "public_key_url": "https://superagentskill.com/api/public/signing-key.pem",
    "instructions": "sha256 the downloaded .zip, compare with `sha256`, then verify the base64 `signature` as an Ed25519 signature over the ascii sha256 hex string using the public key. An extracted or repacked copy can still be verified via `content_digest` / `content_signature`. Helper: node scripts/verify-package-signature.mjs <file.zip> <signature.json> [public-key.pem]"
  }
}