{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "5faa7bb5d85dc6d9c4cdeb3b5bfcc7b3c6cc56508e93dc5f10f1c9e0fefcb581",
  "signature": "fgyQMeEQTt9AD1hmJe/NgeXPXqqqez5+ud9MIx3WS0VMcUCgS2YNK+jEUO2Myp8i9bUJCrtBhAZl1ra1FZyvAg==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T01:06:26.828Z",
  "slug": "lesson-plan-author",
  "version": "0.1.0",
  "filename": "lesson-plan-author-agent-plugin.zip",
  "bytes": 3502,
  "content_digest": "177ef7a2a8c9ee561429470db4d3faedfeea4a20378c7454e16eeda71468204c",
  "content_signature": "+9Mp6fhw0GW5bPwpdi43jHD256HXZnQLd6svZOjwt8mcsWyWc1nq2kqqzYtU4W2NzbbcracrF6Ed4wSEXbYlAw==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "96ec8aa21d71a35f18584ca79a6085aed8de3d7138261ace401cbee962f8770c"
    },
    {
      "path": "skills/lesson-plan-author/SKILL.md",
      "sha256": "b57eeb732e94d43c5217f2aade7d77a932e4c6537c35781ded733d1af1de806a"
    }
  ],
  "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]"
  }
}