{
  "operationId": "create_entry",
  "parameters": [
    {
      "description": "Required route-scoped idempotency key",
      "in": "header",
      "name": "Idempotency-Key",
      "required": true,
      "schema": {
        "type": "string"
      }
    }
  ],
  "requestBody": {
    "content": {
      "application/json": {
        "schema": {
          "$ref": "#/components/schemas/MarsEntry"
        }
      }
    },
    "required": true
  },
  "responses": {
    "201": {
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/MarsEntry"
          }
        }
      },
      "description": "Entry created"
    },
    "400": {
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/ErrorResponse"
          }
        }
      },
      "description": "Entry validation failed"
    },
    "401": {
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/ErrorResponse"
          }
        }
      },
      "description": "SIWS session missing or invalid"
    },
    "403": {
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/ErrorResponse"
          }
        }
      },
      "description": "Session publisher mismatch"
    },
    "409": {
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/ErrorResponse"
          }
        }
      },
      "description": "Entry already exists"
    },
    "429": {
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/ErrorResponse"
          }
        }
      },
      "description": "Write rate limit exceeded"
    }
  },
  "security": [
    {
      "siwsSession": []
    },
    {
      "siwsCookie": []
    }
  ],
  "tags": [
    "entries"
  ]
}