New ability to create mirror and connect board columns

🏷️ API version: 2025-10

Using the existing create_column mutation, you can now create connect board and mirror columns via the API. You can query the new get_column_type_schema object to retrieve the available properties for each column type.

mutation {
  create_column(
    board_id: 1234567890
    title: "Related items (Board 9876543210)"
    column_type: board_relation
    defaults: {
      boardIds: [9876543210]
      allowMultipleItems: true
      allowCreateReflectionColumn: true
    }
  ) {
    id
    title
    type
  }
}

mutation {
  create_column(
    board_id: 1234567890
    title: "Test Column"
    column_type: mirror
    defaults: {
      relation_column: {
        board_relation: true
      }
      displayed_linked_columns: [
        { 
          board_id: "9876543210"
          column_ids: ["status"]
        }
      ]
    }
  ) {
    id
    title
    type
  }
}