{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "910470f9f9b7a87466e6268e954afa9de096b3ac3a6922e149d882ae5938091c",
  "signature": "8dCDoUrVZm3jgyDajIz0kseiHS2gVvxkg6u+J00c6iCQvk0WZZjpVuq/Wfxk6s1OxfDpkWM3QnlCcEjsYps6Dg==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T01:04:37.454Z",
  "slug": "api-designer",
  "version": "1.0.0",
  "filename": "api-designer-agent-plugin.zip",
  "bytes": 3960,
  "content_digest": "a383c085724bdb797c14519b4c307094ff872b5fb9f1fe637e1aa3213eb005af",
  "content_signature": "aaXRz3ZQUgBN9y2vu7aLjyZpHTpRWiKUOaN82yXWjVVmVepDutLUD01u+tsyqy5V0msbgx0N1kkOzxMRGZ4SDQ==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "24d87f6cf0e724e2cf9eb8f5e2fb7f98858e9695402fa1c8175c0918f1491b8b"
    },
    {
      "path": "skills/api-designer/SKILL.md",
      "sha256": "2b0517189b27f110e9892c51e5fac263053143742d5d865de91078f9a8d35e9b"
    }
  ],
  "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]"
  }
}