Common Rule Patterns

Browse complete, copy-pasteable rule examples organized by category. Each rule page follows a consistent format: what the rule checks, examples of incorrect and correct code, the full .rules.ts implementation, and guidance on when to use it.

Dependency & Package Management

| Rule | Description | | ------------------------------------------------------- | ---------------------------------------------------------------------------- | | no-unapproved-deps | Restrict production dependencies to an approved allowlist | | version-catalog | Enforce centralized version management in monorepos with catalog: notation | | monorepo-task-runner | Ban package.json scripts and require task runner config in every package |

Import & API Restrictions

| Rule | Description | | ----------------------------------------------------- | ------------------------------------------------------------------------- | | no-banned-imports | Prevent usage of banned libraries with a data-driven pattern list | | no-banned-api | Ban specific runtime APIs that cause cross-platform or reliability issues | | wrapper-enforcement | Enforce use of a project wrapper instead of a raw platform API |

File Structure & Organization

| Rule | Description | | ------------------------------------------------------- | --------------------------------------------------------------------- | | kebab-case-filenames | Enforce consistent file naming conventions using regex validation | | no-barrel-files | Detect and ban barrel files (re-export-only index.ts) | | test-file-coverage | Verify that every source file has a corresponding test file | | component-pairing | Enforce Connected/presentational component pairs with opt-out support |

Code Quality & Output

| Rule | Description | | ------------------------------------------------------------------- | ------------------------------------------------------------------ | | no-todo-comments | Flag TODO, FIXME, HACK, and XXX comments before merging | | no-emoji-in-output | Ban emoji and raw ANSI codes in CLI output strings | | max-file-length | Warn when source files exceed a configurable line count | | page-component-constraints | Enforce size limits and ban data-fetching hooks in page components |

Database Schema

| Rule | Description | | --------------------------------------------------------- | --------------------------------------------------------------- | | database-audit-fields | Ensure all tables include created_at and updated_at columns |

Architecture Boundaries

| Rule | Description | | ----------------------------------------------------------------- | ----------------------------------------------------- | | required-export-pattern | Verify files export a required function signature | | openapi-routes | Ensure backend routes use OpenAPI-typed definitions | | clean-architecture-layers | Enforce dependency direction in layered architectures |

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