💅 useFilenamingConvention errors on files starting with non-letter, a $ for example

[hilja]

Environment information

CLI:
  Version:                      1.9.2
  Color support:                true

Platform:
  CPU Architecture:             aarch64
  OS:                           macos

Environment:
  BIOME_LOG_PATH:               unset
  BIOME_LOG_PREFIX_NAME:        unset
  BIOME_CONFIG_PATH:            unset
  NO_COLOR:                     unset
  TERM:                         "alacritty"
  JS_RUNTIME_VERSION:           "v20.17.0"
  JS_RUNTIME_NAME:              "node"
  NODE_PACKAGE_MANAGER:         "pnpm/9.11.0"

Biome Configuration:
  Status:                       Loaded successfully
  Formatter disabled:           false
  Linter disabled:              false
  Organize imports disabled:    false
  VCS disabled:                 false

Linter:
  JavaScript enabled:           true
  JSON enabled:                 true
  CSS enabled:                  true
  GraphQL enabled:              false
  Recommended:                  true
  All:                          false
  Enabled rules:
  style/useImportType
  suspicious/noCatchAssign
  suspicious/noUnsafeNegation
  complexity/useLiteralKeys
  complexity/noMultipleSpacesInRegularExpressionLiterals
  a11y/useValidLang
  complexity/noUselessEmptyExport
  suspicious/useNamespaceKeyword
  suspicious/useValidTypeof
  a11y/useValidAriaRole
  correctness/noConstantCondition
  a11y/useAriaActivedescendantWithTabindex
  suspicious/noAssignInExpressions
  style/useDefaultParameterLast
  complexity/noEmptyTypeParameters
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  correctness/noSwitchDeclarations
  a11y/noAutofocus
  correctness/noUnsafeOptionalChaining
  correctness/noConstAssign
  suspicious/noControlCharactersInRegex
  complexity/noUselessTypeConstraint
  style/noVar
  suspicious/noDoubleEquals
  suspicious/noRedundantUseStrict
  style/useLiteralEnumMembers
  suspicious/noGlobalIsNan
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  style/noShoutyConstants
  a11y/noAriaUnsupportedElements
  correctness/noInvalidGridAreas
  style/useFilenamingConvention
  correctness/noFlatMapIdentity
  a11y/noBlankTarget
  a11y/useHeadingContent
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  correctness/noVoidTypeReturn
  correctness/noInvalidUseBeforeDeclaration
  a11y/noAriaHiddenOnFocusable
  a11y/useGenericFontNames
  correctness/noUnknownMediaFeatureName
  a11y/useAnchorContent
  complexity/noUselessRename
  style/useNumberNamespace
  complexity/noUselessConstructor
  a11y/noAccessKey
  nursery/useSortedClasses
  style/noUnusedTemplateLiteral
  complexity/noUselessSwitchCase
  style/useExponentiationOperator
  style/noNegationElse
  style/useSingleVarDeclarator
  suspicious/noExportsInTest
  a11y/noNoninteractiveElementToInteractiveRole
  style/noCommaOperator
  suspicious/noDuplicateAtImportRules
  suspicious/useIsArray
  a11y/noHeaderScope
  complexity/noUselessFragments
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  complexity/noForEach
  suspicious/noClassAssign
  suspicious/noEmptyBlock
  suspicious/noFunctionAssign

Workspace:
  Open Documents:               0

Rule name

useFilenamingConvention

Playground link

https://github.com/hilja/biome-repro-1727426814198

Expected result

Settings for useFilenamingConvention:

{
  "linter": {
    "rules": {
      "style": {
        "useFilenamingConvention": {
          "level": "error",
          "options": {
            "strictCase": true,
            "requireAscii": true,
            "filenameCases": ["camelCase", "export"]
          }
        }
      }
    }
  }
}

Remix has route files like this app/routes/$.tsx and Biome errors on it:

The filename should be in camelCase or equal to the name of an export.

That $.tsx can’t really be camelCased no matter what. Should filenames like this be ignored by default?

Remix also has routes like this that are caught in the error: app.$foo.$bar.tsx.

For now I can ignore them in overrides of course.

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