Strict anti-over-engineering enforcement. Activates on ANY code change to verify scope: (1) Modifying code or files the user did not explicitly ask to change (2) Creating new abstraction layers (class, interface, factory, wrapper) without being asked (3) Adding comments, documentation, JSDoc, or type annotations without being asked (4) Introducing new dependencies without being asked (5) Rewriting entire files instead of making minimal edits (6) Diff scope significantly exceeding the user's request (7) Adding error handling, validation, or defensive code for scenarios that cannot occur (8) Generating tests, configuration scaffolding, or documentation without being asked (…