{
  "spec": "sak-package-signature/v1",
  "algorithm": "ed25519",
  "sha256": "397b77e7b15c409d8011789d34fedc5cbbba8184174c16eee6dbc6c6e6099270",
  "signature": "Q6fKewR0HlOY6OKZuQc4FCcb6RolhwPTgDPknUOobOCi78KnZm6si3jH5jFqM01CYQMOnho+sjnk/BI6u8fgAw==",
  "signing_key_id": "0aff169ecb84607d",
  "signed_at": "2026-08-24T01:36:38.605Z",
  "slug": "guardrail-civil-infrastructure-safety",
  "version": "0.1.0",
  "filename": "guardrail-civil-infrastructure-safety-agent-plugin.zip",
  "bytes": 3756,
  "content_digest": "16a4a34896bfb7dfc0d97ef7882e020738386bc695f66cfffcd890e500633d2a",
  "content_signature": "CR13epDxkEOywy9ajYWQBy58K5/bHoP5UfflJ9EohGi6prRhUxOhgup0jtWk8C9tg1T2DDiFecBSrFT1KCkGDg==",
  "files": [
    {
      "path": "mcp.json",
      "sha256": "a4ec0149cccb566b6c4b6d8413290229819ff2adcfa9eb5387c3f91d31103a57"
    },
    {
      "path": "plugin.json",
      "sha256": "01e748f50662d8d8f3cfebf199e071097fb2b97305e50cdbad4c8f66ded75be4"
    },
    {
      "path": "skills/guardrail-civil-infrastructure-safety/SKILL.md",
      "sha256": "97cbc8dd909f5a773551140ee870a1a6d4a7127c38c0c3b4f4e2344cb296e5cf"
    }
  ],
  "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]"
  }
}