{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "95a75366cbb5738871abaa802db962bf22475bf6841ebba7c63d5a7be1588f1b",
  "signature": "RJny548I8Su71vTVXjuKY1hucUa5VMNeVR9u2ZZ+qQ9nbLWG+f0/EX0s2Keuvr65ItGW5ORRwccLRmZSXMUEAA==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-10-08T16:25:44.879Z",
  "slug": "micrograd-tutor",
  "version": "0.1.0",
  "filename": "micrograd-tutor-agent-plugin.zip",
  "bytes": 3174,
  "content_digest": "5128459fb21cf38a72c75ba997aa648023ea7ef79dcc8d59e499fdc54df2aaa2",
  "content_signature": "Uwfd1VyycZgBqyyV+rOyy3CbS5cxOulNUlv8VJcl5f/eqVUc3iWEixJ628wP/3kDQAcJpEN0I7HcPNwBBrLNCA==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "4f075be2bb19cf0206df3446ef3265b97e85ad9f6122253fb84a83a0fc41387e"
    },
    {
      "path": "skills/micrograd-tutor/SKILL.md",
      "sha256": "1d142830fde3083d39a2a4f2bda830579c22254fb128f73a8527301f4766dfd0"
    }
  ],
  "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]"
  }
}