{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "bd81bf7a1dc9db9a1f299a63ffc2e220ce2c0873d4a35601e86feb75996e695f",
  "signature": "+CTe7zuMVqbo9b+o537bG4k5nP+jswo6Et4Tdxb2qECzOd2pO6lCDivaosMRRWWRKVejPggWCXSyrCTfXqw+BA==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T01:08:49.570Z",
  "slug": "expense-policy-checker",
  "version": "0.1.0",
  "filename": "expense-policy-checker-agent-plugin.zip",
  "bytes": 3520,
  "content_digest": "6b415bad499037892eb914337cf7f9034b46b76fa303fb49623520588d3f6a7b",
  "content_signature": "gtXvxSirUXgb/nziySkkPmAspqkX9jNq3FzIA742+3CNbV1HJ5K43anaFEwjNl5ng4gIoVxq88qjMjKaWhmyBw==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "718adb157cfebd7d39a77a2ed974d676ab6a4c39c2b02b63152ae1381bb3b3a3"
    },
    {
      "path": "skills/expense-policy-checker/SKILL.md",
      "sha256": "bad1897aedcf6786fe73d55c4b9a6abdefae5b2ff1cb160c2ecc965e7fb7c62f"
    }
  ],
  "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]"
  }
}