Rules Overview

Pickier provides a small set of core rules and a growing set of plugin rules. Core rules are configured under rules. Plugin rules are configured under pluginRules.

You can explore the rule implementations directly in the codebase:

• Core and plugin checks live in packages/pickier/src/cli/run-lint.ts.
• Formatter-related helpers (imports, spacing) live in packages/pickier/src/format.ts.

Core:

• noDebugger
• noConsole
• noCondAssign (optional)
• noTemplateCurlyInString (optional)
• regexp/noUnusedCapturingGroup (optional)

Plugin:

• max-statements-per-line
• no-super-linear-backtracking
• no-unused-vars
• prefer-const
• sort-array-includes
• sort-classes
• sort-enums
• sort-exports
• sort-heritage-clauses
• sort-imports
• sort-interfaces
• sort-keys
• sort-maps
• sort-named-imports
• sort-object-types
• sort-objects
• ts/no-require-imports

Groups:

• pickier: sorting and hygiene rules
• style: stylistic constraints
• regexp: regex safety checks
• ts: TypeScript-specific rules

See Advanced » Plugin System for configuration details.

Best practices

• Start new rules at warn to gauge noise, then tighten to error where appropriate
• Prefer bare rule IDs in config (e.g., 'sort-imports'), leverage category prefixes for discoverability (e.g., 'regexp/no-super-linear-backtracking')
• Keep sorting rules (sort-objects, sort-keys, sort-exports, sort-imports) enabled to reduce merge conflicts and diff noise
• Pair rules with the formatter for auto-fixes where supported
• Use group pages — pickier, style, regexp — to navigate related options and examples