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stdlib	[ DIR ]	drwxr-xr-x	2026-04-07 17:42
steep	[ DIR ]	drwxr-xr-x	2026-05-05 23:07
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CHANGELOG.md	46.48 KB	-rw-r--r--	2026-04-07 17:42
COPYING	2.38 KB	-rw-r--r--	2026-04-07 17:42
Gemfile	523 B	-rw-r--r--	2026-04-07 17:42
Gemfile.lock	2.34 KB	-rw-r--r--	2026-04-07 17:42
README.md	4.66 KB	-rw-r--r--	2026-04-07 17:42
Rakefile	6.31 KB	-rw-r--r--	2026-04-07 17:42
Steepfile	1.1 KB	-rw-r--r--	2026-04-07 17:42
exts.mk	2.46 KB	-rw-r--r--	2026-04-07 17:42
goodcheck.yml	2.39 KB	-rw-r--r--	2026-04-07 17:42

Rename

rules:
  - id: rbs.no_arg
    pattern:
      regexp: arg\d+
    message: |
      Stop using parameter names like `arg0` or `arg1`

The parameter names like `arg0` or `arg1` is not informative enough.
      Try finding good parameter names from documents or arglists.
      If you cannot find a good name, just delete the name of the parameters.
    justification:
      - Documents (comments) may contain that pattern.
    glob:
      - "{core,stdlib}/**/*.rbs"
    fail:
      - "def `send`: (String | Symbol arg0, *untyped arg1) -> untyped"
    pass:
      - "def `send`: (String | Symbol, *untyped) -> untyped"

- id: rbs.prefer_boolish
    pattern:
      - regexp: '$[^(]*\bbool\b[^\n]*$'
      - token: "-> bool }"
    message: |
      Prefer `boolish` over `bool` for method arguments and block return values

See the doc below:
      https://github.com/ruby/rbs/blob/78d04a2db0f1c4925d2b13c2939868edf9465d6c/docs/syntax.md#bool-or-boolish
    glob:
      - "**/*.rbs"
    justification:
      - When you strictly want `true | false`. Use `bool` in this case.
    pass:
      - "(arg: boolish)"
      - "{ () -> boolish }"
    fail:
      - "(arg: bool)"
      - "{ () -> bool }"

- id: deprecate_stdlib_test
    pattern:
      token: < StdlibTest
    message: |
      StdlibTest is deprecated

We recommend writing tests based on `TypeAssertions` and `#assert_send_type`.
    justification:
      - When you are updating existing tests.
      - When you are writing tests for callback, which cannot be done with `#assert_send_type`.
    glob:
      - "test/stdlib/**/*_test.rb"
    fail:
      - |
        class IntegerTest < StdlibTest
          target Integer

def test_plus
            1 + 2
          end
        end
    pass:
      - |
        class IntegerTest < Test::Unit::TestCase
          include TypeAssertions

testing "Integer"

def test_plus
            assert_send_type "(::Integer) -> ::Integer",
                             1, :+, 2
          end
        end

- id: no_trailing_whitespace
    pattern:
      regexp: '[ \t]+$'
    message: |
      Trim trailing whitespaces
    glob:
      - '**/*.rb'
      - '**/*.rbs'
      - '**/*.md'
    justification:
      - Let the maintainers know if it is an autogenerated files.
    pass:
      - "Hello world"
      - "Hello\nworld"
      - "Hello\n\nworld"
    fail:
      - "Hello world  "
      - "Hello \nworld"