{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "92e6439e264383a0ac050579b5bf010fa3c980fb78047299c42b79839889d27d",
  "signature": "VTBTc+IViw6lR52WTvRhVq2BF3DpDEv/0cZ6U5I2y1w6p1BCSvuKrqsjNohRJSrfjzbCt5Fb7wh+KtN4w6JeBA==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T00:21:01.683Z",
  "slug": "customs-classifier",
  "version": "0.1.0",
  "filename": "customs-classifier-agent-plugin.zip",
  "bytes": 3448,
  "content_digest": "63015844488f53967e93a83b6ad6413f7c0ac72da94b72c9e586f3536e4a9957",
  "content_signature": "BHoUMVHoW9W5XoG8FzWHMc7kkyaRoAZY1BILhH47iOhS82pMK7bm2MlJT9I5x3O9XsZzkVIPJ6k74jMfnA5ACg==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "a48ac24906047d4e45d4b40fd5d1b4d5418c38192f6019082725c21c63a56c90"
    },
    {
      "path": "skills/customs-classifier/SKILL.md",
      "sha256": "f8bf6e6568c2b150904d8f0038fe479137809054f9ebac6c03915474e4c8fe1c"
    }
  ],
  "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]"
  }
}