{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "3382147ac068de8dd625d24e2d44bf6c007510f4c940a2c02b400769b716fafd",
  "signature": "GKsXYOLNGuGlm17zXWV4VhFUhLeUWb49rXPcPsT8b97v1bYEUaMWFTfPQ+dxAePDGZGBD49rPnhocMxJMPJmCw==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T02:02:18.489Z",
  "slug": "gx-cro-expert",
  "version": "0.1.0",
  "filename": "gx-cro-expert-agent-plugin.zip",
  "bytes": 4747,
  "content_digest": "06ffa9785ac07b7eca39389f9c299aee97fc883d97c350ce00f8d656a791f156",
  "content_signature": "qiDfz6vf0Ja0Cr5wsFdM6b9YUREYhWpL8b91bnuDftfO1iFoKKA5R78cTFW8MRiAG8FOU05Yk/RO6b0JNu5XDA==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "30234f3b82014f9786d462c2a4ebd0bd569cc9fea3ecfb010eeea256e5c8bcf1"
    },
    {
      "path": "skills/gx-cro-expert/SKILL.md",
      "sha256": "df8eb1d659773c744741134e976fd2952393098389bfee9637052ca489eb100e"
    },
    {
      "path": "skills/gx-cro-expert/references/examples.md",
      "sha256": "6b512ba03968fe43ae5607d5ef058adc3ecf7a5449675b6a0954f62d92b2b45a"
    }
  ],
  "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]"
  }
}