Apply battle-tested code conventions when writing or modifying code in Laravel/PHP projects (with React/TypeScript frontend support). Use this skill whenever the user is writing a new feature, refactoring existing code, creating a controller/action/migration/model/test, or asks 'how should I structure this', 'what's the convention for X', 'is this the right pattern'. Also use proactively before producing non-trivial code so the output follows conventions the first time instead of needing rewrites.