{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "4b3cee0d44958056d9ca068b46feb5aba5af3f257101b508e358add2f3d829b9",
  "signature": "91KrqFoG7+ZEwCeXkXRCC6p+6KlLA239824M9Xo5Po+ClvsfV/A8N5dBkOkXo2+dTyTbLAKaqAs4PlOtI9EWCw==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-23T23:29:23.560Z",
  "slug": "freight-rfp-runner",
  "version": "0.1.0",
  "filename": "freight-rfp-runner-agent-plugin.zip",
  "bytes": 3474,
  "content_digest": "880dbbc5d157e5514efc3647b90a77c43a80ce1c345b35da06620bddbe0633df",
  "content_signature": "FZbZU9Ok2zC2yKLI7vbFFoo8R0xjzG1fgPesJJwqr2sSE/tSLeFPd7mzr6lW4jwBbDsao86P2svcFQ2jI38IAg==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "dbfe8ed61c0bb3e15bf5bd6ddf381ab233352aa6488b091ee412f5e77baee28f"
    },
    {
      "path": "skills/freight-rfp-runner/SKILL.md",
      "sha256": "672dd5911412f7fb0da05fe738fb4cfe373799caa108611091535648be02c94b"
    }
  ],
  "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]"
  }
}