nvim-treesitter/queries/leo/indents.scm

[
  (record_declaration)
  (struct_declaration)
  (mapping_declaration)
  (constant_declaration)
  (return_statement)
  (expression_statement)
  (variable_declaration)
  (loop_statement)
  (assignment_statement)
  (assert_statement)
  (struct_expression)
  (array_expression)
  (tuple_expression)
  (parenthesized_expression)
  (items_block)
  (block)
] @indent.begin

; if "if" statement and conditional statement are in separate lines
; conditional should be indented and when the conditional block
; starts dedented
(branch
  (block
    "{" @indent.end)) @indent.begin

((function_parameters) @indent.align
  (#set! indent.open_delimiter "(")
  (#set! indent.close_delimiter ")"))

[
  (comment)
  (ERROR)
] @indent.auto