Consistently use snake_case naming throughout the codebase for variables, methods, and identifiers to maintain established conventions. When the codebase has adopted snake_case as the standard, all new code should follow this pattern rather than introducing camelCase or other naming styles. Example: ```typescript // Preferred - follows codebase snake_case convention const class_name = `__svelte_${hash(rule)}`; function push_quasi(q: string) { ... } // Avoid - inconsistent with established convention const className = `__svelte_${hash(rule)}`; function pushQuasi(q: string) { ... } ``` This ensures consistency across the codebase, improves readability, and prevents confusion when different naming conventions are mixed within the same project.