Username Availability Check (Social & Dev Platforms)

{
  "type": "object",
  "required": [
    "username"
  ],
  "properties": {
    "username": {
      "type": "string",
      "description": "Username/handle to check across platforms (e.g. 'google', 'octocat'). Same string is used for every platform -- no per-platform overrides."
    }
  },
  "additionalProperties": false
}

{
  "type": "object",
  "required": [
    "username",
    "profiles",
    "found_count",
    "not_found_count",
    "available_platforms"
  ],
  "properties": {
    "profiles": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "platform",
          "exists"
        ],
        "properties": {
          "exists": {
            "type": "boolean",
            "description": "Whether an account/profile under this exact username was found on this platform."
          },
          "platform": {
            "type": "string",
            "description": "e.g. 'GitHub', 'YouTube', 'npm'."
          }
        },
        "additionalProperties": true
      },
      "description": "One entry per platform checked -- 7 entries on both real calibration calls (GitHub, YouTube, TikTok, Reddit, Pinterest, npm, PyPI)."
    },
    "username": {
      "type": "string",
      "description": "The username/handle that was checked, echoed back exactly as submitted."
    },
    "found_count": {
      "type": "number",
      "description": "Count of `profiles` entries with `exists: true`."
    },
    "not_found_count": {
      "type": "number",
      "description": "Count of `profiles` entries with `exists: false`."
    },
    "available_platforms": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Platform names where the username was NOT found, i.e. likely available to register -- observed as an empty array on the widely-registered handle and a 2-entry array (GitHub, YouTube) on the mostly-unregistered handle. Do not assume every not-found platform lands here -- both real calls also had a not-found platform (Reddit, npm) that did NOT appear in this list, so its inclusion criteria beyond 'not found' are unconfirmed."
    }
  },
  "description": "The username check result, as returned at routing.responseResultPath ($.output).",
  "additionalProperties": true
}