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Analyze the mechanics of Class-Level Hooks and inheritance tracking in Ruby frameworks.

Updated May 17, 2026

Short answer

Hooks like inherited, included, and extended allow developers to intercept changes to classes and modules, automating registration and configuration.

Deep explanation

Ruby provides lifecycle hooks that trigger automatically during code compilation and modification. When a class is subclassed, Ruby invokes self.inherited(subclass) on the parent class. Similarly, included and extended trigger when modules are mixed into classes. Frameworks leverage these hooks to track dependencies, automatically register API routes, or inject shared configurations without requiring explicit setup steps from the developer.

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