{
  "name": "save_milestone",
  "description": "Create or update a milestone in a Linear project. If `id` is provided, updates the existing milestone; otherwise creates a new one. When creating, `name` is required.",
  "inputSchema": {
    "$schema": "http://json-schema.org/draft-07/schema#",
    "type": "object",
    "properties": {
      "project": {
        "type": "string",
        "description": "Project name, ID, or slug"
      },
      "id": {
        "description": "Milestone name or ID",
        "type": "string"
      },
      "name": {
        "description": "Milestone name (required when creating)",
        "type": "string"
      },
      "description": {
        "description": "Milestone description",
        "type": "string"
      },
      "targetDate": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "description": "Target completion date (ISO format, null to remove)"
      }
    },
    "required": [
      "project"
    ],
    "additionalProperties": false
  }
}