Creates Rails concerns for shared behavior across models or controllers with TDD. Use when extracting shared code, creating reusable modules, DRYing up models/controllers, or when user mentions concerns, modules, mixins, or shared behavior.
Install with Tessl CLI
npx tessl i github:fernandezbaptiste/rails_ai_agents --skill rails-concern90
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npx tessl skill review --optimize ./path/to/skillValidation for skill structure
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