{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "f474247ba0c87f9f43774194c71e51628468ee101e06c2167dc30a20358b6c47",
  "signature": "E7YjFhmsBx7TylIhLC+uxk8GaRYbiJ8T0Hd5wUBZbXWyuBjNpq3UJ7rkz7dVWkNP+yDZZEF3y79UsjKnkQJkDQ==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-23T23:24:09.622Z",
  "slug": "perf-profiler",
  "version": "1.0.0",
  "filename": "perf-profiler-agent-plugin.zip",
  "bytes": 3476,
  "content_digest": "f046aa9a20d14ac5eab3eefcc0d3969ac2d61da18ef675db54880f3f45e6aa2d",
  "content_signature": "ZyIeCMAe5WtIG7hw88DtUH2G0fIK4/Q7fBVkDMt8j902aciKvgThOZVYbWnbLiCRJdh82oNJgmCabSfnAUZFDw==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "194907d94ef583e565858bc866f73b799fa81549d0b9fff8568c22d703a2c4c8"
    },
    {
      "path": "skills/perf-profiler/SKILL.md",
      "sha256": "178f9af18953a1ea70fb427f309f545e8895db3577780f7111dddd67367423c7"
    }
  ],
  "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]"
  }
}