{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "ead7027425a64d7e38740fe6653f051c80f23e6ec7608ca0a6775bf4dae18941",
  "signature": "N/m4jdZX/J47w6EUXHsMey5AEaZahswySTmbG91b5jqKVZv/Sy6V7ElQcxkWYki6A74FKkN/mVQ9mCLBUK/yCg==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T00:38:43.646Z",
  "slug": "context-engineer",
  "version": "1.0.0",
  "filename": "context-engineer-agent-plugin.zip",
  "bytes": 5033,
  "content_digest": "7a005925347280964473f522813571c563225af2a4319af128a3360c3554e608",
  "content_signature": "yoeuv2t9bzX55yQexi6nrBtgiWGfWQuybXOgA8CTQH46TaKYaYcAIYEg6e21YySUHPQt9yrdvrfnrmQt/OkmCg==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "1802b7fe59bc381717c7e534d256ba4c63d6bb4276b51f5816c48bcba17e129f"
    },
    {
      "path": "skills/context-engineer/SKILL.md",
      "sha256": "813c429b30583d93eb961934a5a626fb6d80f1b2d71e49f03290c72072c12d00"
    },
    {
      "path": "skills/context-engineer/references/examples.md",
      "sha256": "65587b87dbd9869423a7532d0c7743a83f2a6af6cb12d2eac2df158077243d24"
    }
  ],
  "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]"
  }
}