nvim-treesitter/queries/teal/locals.scm

(var_declaration
  declarators: (var_declarators
    (var
      (identifier)) @local.definition.var))

(var_assignment
  variables: (assignment_variables
    (var
      (identifier) @local.definition.var) @local.definition.associated))

(arg
  name: (identifier) @local.definition.parameter)

(anon_function) @local.scope

(function_statement
  (function_name) @local.definition.function) @local.scope

(program) @local.scope

(if_statement) @local.scope

(generic_for_statement
  (for_body) @local.scope)

(numeric_for_statement
  (for_body) @local.scope)

(repeat_statement) @local.scope

(while_statement
  (while_body) @local.scope)

(do_statement) @local.scope

(identifier) @local.reference