{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "c4023fcd1843b398dc0c6a2dc39fd9781cf1bd872773c10be3d1d0309deecc2d",
  "signature": "BlBdMrp4j8MlrmEiD9OLNhCOBvHBj6qOM0xFWC0MEjaXia/WH1ZzV3n71wzZ12SyJaXfBlu29Vckjd7oEJg8Cw==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T00:22:38.363Z",
  "slug": "csp-builder",
  "version": "0.1.0",
  "filename": "csp-builder-agent-plugin.zip",
  "bytes": 3371,
  "content_digest": "60212e0bb6f83354b7ab749ac0026ffb9f30cbaadd6f884b0f9b6ab4b3e6bfd2",
  "content_signature": "wkmJRMtE/HCGUlZO0vqmSV10JFP1jDCX6HiYIzZa1yQQkHJ9UbhX/jvMVz89GphvsQSDAo9rlN8qkmQTdJ6DCg==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "ff181ac31bbb6b24fcf64e9ebe1696270ade210056562df2004c985646cfa563"
    },
    {
      "path": "skills/csp-builder/SKILL.md",
      "sha256": "dc8e1882cf4e9187a4f3906490c5994737acd98b5d2051a243df0d7d7cbd8888"
    }
  ],
  "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]"
  }
}