{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "bc4eee44d98bb562acae9a33b6d5f0d6e7bc6de5f1319e70c5f8322130f7a84f",
  "signature": "xRfefipFc4uQwxdMovTabavc1Wo5w0PC0lXsNgv+hHG01wJZtb62KD/6v+5rLtYKjBw5+oT7zcdIVwOiPrH5BA==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-10-08T16:25:44.493Z",
  "slug": "test-driven-design",
  "version": "0.1.0",
  "filename": "test-driven-design-agent-plugin.zip",
  "bytes": 3201,
  "content_digest": "7c3b9908ad4a82d509cf562c948ff094fd972d3b16d615db82b42ec55513d82d",
  "content_signature": "kQzHY3/SBcE/M4IZ2yY6JIU8yqEZCoLxcTSLFcsQf1XyBu618IuDNpibIdfmKR+cWJuFDXyKFI5GVPZBbhnwDg==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "20ea37c5755be624ec199b4978a3655cc602ea39bfb49659ec8d87c1bc265268"
    },
    {
      "path": "skills/test-driven-design/SKILL.md",
      "sha256": "b7dc4f1949fb42c47aad9ceb65ea2e735a84b2001586bed159429d6da23db054"
    }
  ],
  "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]"
  }
}