{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "6ef8a0bf88018c1bd08d3a20330f1707e8af37a961ef7f34ea8f0f9fecd7a92c",
  "signature": "NIv/0qbQPj7mEu/AGEvH0LqUYY4MVFOlOT5IXV6FMioixC2pG+3muQ7x1Lg5KJznxrnVzufvl0JNxGoIKgx8Bw==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T01:08:00.261Z",
  "slug": "ad-creative-tester",
  "version": "0.1.0",
  "filename": "ad-creative-tester-agent-plugin.zip",
  "bytes": 3494,
  "content_digest": "24e46e4224d246a5e0ad6e2648d82167461be8ed4a6692fbc29e6011f2f02262",
  "content_signature": "gy7ppqV0aLyOjMaqJsa4iwqtNsAY4gq8K+llJ08tE51jsrq5liXoEy+9WYdWw6+0SlLGX8run5miIX9TL+gGAA==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "9ce56acda62c94d456b0c86a9f5520e4c1c67fd3e5abe5ad35a9dea751f4424f"
    },
    {
      "path": "skills/ad-creative-tester/SKILL.md",
      "sha256": "9b3cf486c844606bb8317b03055a98691df8a102d1c72733b046a9e67ea4266d"
    }
  ],
  "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]"
  }
}