{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "20282539a572ec062179ff4b54554d9480d5758c191ece07b6ef594a1020320d",
  "signature": "4vFQMDusUvDt1iCTYQIkR62KxhkZDGOLWnd/8AdKQWN0B2MNiKIjjI6fcBDKyH1OiMOtxrKMS3AkpbpYtMIuDQ==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T02:03:59.376Z",
  "slug": "gtm-discovery-call-coach",
  "version": "0.1.0",
  "filename": "gtm-discovery-call-coach-agent-plugin.zip",
  "bytes": 4398,
  "content_digest": "cea4cbda7d63ed3280ab5b82119f2bf2fc857feca51f3ab2722dd03e4baf7036",
  "content_signature": "HddMRYxo1YvuSvS897CXcdsYoOsmUCsHVHJu2ius3cPmxtZyHPPWoUjj0om55hUtKqP4AipcWsoI4Iw7jLZrBw==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "21cb17bcfa38c7f3ce757c23bd12811c30875f8f2f20e594b1b37461c6202bb0"
    },
    {
      "path": "skills/gtm-discovery-call-coach/SKILL.md",
      "sha256": "863b24241bd75772b9327100d9e49265cdbcc3ed032cd10b467eedc8e528fff0"
    },
    {
      "path": "skills/gtm-discovery-call-coach/references/examples.md",
      "sha256": "92d79b3a33385cb09a5a2d27771170366482b9fe853b73b77466b21b7c2012d4"
    }
  ],
  "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]"
  }
}