{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "32f1737cea5ad1f01bd5757b140bf2567c3015a480679b283356a58eea63b43f",
  "signature": "QvEdMMGw1kkotN8tSdu7IKspqStKgM268W1nR8h5aqmSzIUHYDpZDdEnc9raAEHWM71Hk9PphTg8KLNZ8f9UDw==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T01:56:54.553Z",
  "slug": "motion-spec-author",
  "version": "0.1.0",
  "filename": "motion-spec-author-agent-plugin.zip",
  "bytes": 3515,
  "content_digest": "6cf0c036622b6cbc0fa7ef543ca00d65e4d2182fc9479667aa9b9bc662b74292",
  "content_signature": "/PZj2Bn2FsqeVtJJ8n5gJO4nbcbXpzSI9xLvTrET2WbNyGY8ezIIkCqsKJcjwoiQ8Z95Fb1FEX1uca7BOOEtDg==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "e22160029db3dc2ea8ff2f9c2c4d068595b8359cfb5dc45e6f9dcc43048bab68"
    },
    {
      "path": "skills/motion-spec-author/SKILL.md",
      "sha256": "b954badf97fe1950ccf00e36f608fbc707b508b4b6aee2cfc8cea52630755d4c"
    }
  ],
  "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]"
  }
}