{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "0efce0e02a9bda0b6cd65be3b45bb3e8ab555a62ca86acc12794a2e16a290370",
  "signature": "/3AQiDLrgbOX4PgGSiNodztNG0jm2Pk0B3EnFBgsuFQv6NNZt52FicYy4uEffmP1X7hUQu6uInqvHP5U20JVDg==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T01:07:37.172Z",
  "slug": "od-copywriting",
  "version": "0.1.0",
  "filename": "od-copywriting-agent-plugin.zip",
  "bytes": 4124,
  "content_digest": "f42829414963cee405ad3113a8de0c26d971ecec945c5ccb4ad5e5d7f98db0b6",
  "content_signature": "8MGcqWKUc7HFXN3bDWiOThSJizVFlDhnZVsKYhhA68YPIwIxI3ZYAIQxxdfSvcMwBuGEARHips5Vs2DI6Y9zAw==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "a3b16cf8f30be4a4bb4f9b3a88a4caa726839e18b7954f185677298a5fa50979"
    },
    {
      "path": "skills/od-copywriting/SKILL.md",
      "sha256": "62e6a517d1b2aaeae6daf4a456484034ea7ac762e958a5c519f58b50bae45c94"
    },
    {
      "path": "skills/od-copywriting/references/examples.md",
      "sha256": "24a7b9f738e8db3f816dc107e47de07a92de2ac2baaeebfc81b897c1bdd7a074"
    }
  ],
  "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]"
  }
}