{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "d967f5b0cccedb2049c62c14fca46a4c893923d657f02e609d8ab07cd9200573",
  "signature": "YXwZEMzk5ejPYUuGxsNvhE95rpYbycxvRSDuynaq7c4FwVM3v7xvbOQc4CSBsLnHGKmhFuIIimmHn56wZ/M6CQ==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-23T23:50:14.890Z",
  "slug": "pdf-extractor",
  "version": "0.1.0",
  "filename": "pdf-extractor-agent-plugin.zip",
  "bytes": 3174,
  "content_digest": "13d40d2349cf3d8eb337636da6094020f0b703245a45c9a56c50e649f4e07ff4",
  "content_signature": "wFyQBbu58w4Qixp5b6GVmCPWE4dUjuc22ubyIP7RJ2NniAcfr7BxRduTAgM2pkv7sq6LZuNkrqx5Zz+dkxeSBA==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "c9ad2b6b71feb1d2ee36d9541a5334413f5277232bfb7170239c4ac2313ca2eb"
    },
    {
      "path": "skills/pdf-extractor/SKILL.md",
      "sha256": "b57de1fca505ae10433a4e090366d94cf2acacc91d7a621f8f8e05ff41daf26a"
    }
  ],
  "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]"
  }
}