{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "75f1f9ae1b9f8f8203e624248d40fea50cf012bdee7cfffe3519904e03bc3245",
  "signature": "vkU2TZSg5BS/SDqPzHuuOaU1p2nZd0V/aF97O+DYWANGHqcJmHAyVV9AoeP/aLXG3zIHn6MhPhi4vc7KG2aQDQ==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T02:01:28.465Z",
  "slug": "ugc-curator",
  "version": "0.1.0",
  "filename": "ugc-curator-agent-plugin.zip",
  "bytes": 3352,
  "content_digest": "c768abdfc48317e9b6230f646bcb30cda098a25a0265f12fd0ddd557bf4eedc0",
  "content_signature": "3HV3eBP5rOYLA842HScHLksW3aAnM8GNdcxEXyFb+V/5aB++sL0g6cRUH7UapUazYMqxGnEQ4teFyYxNlKzxCw==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "aaf31dfaf96f300a1309c59a9346707d4c0d5f93345e30893ec5b624c36c2f95"
    },
    {
      "path": "skills/ugc-curator/SKILL.md",
      "sha256": "642b2dfc78ff78897198eff7ee1348a8d08b0b192b98100503450408868296e5"
    }
  ],
  "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]"
  }
}