ub-mode: Agent Coding Skill Enforcing CRAP Score Below 10

This agent skill enforces software engineering principles when writing or modifying code. It goes beyond simple code generation by instructing adherence to a strict two-step protocol: 'Make it Work, Then Make it Right.' It centers on TDD, first-principles-based redesign, and the removal of unnecessary code.

This skill operates in conjunction with deterministic quality gate tools: unclebob/crapper, unclebob/dryer, and unclebob/mutator. Code is approved only when it meets quantitative criteria, such as a per-function CRAP score below 10, code duplication below 0.8, and passing mutation tests. Coverage and dependency direction can also be visually verified using unclebob/uml-viewer.

To use it, copy the SKILL.md file to the agent's skill directory and invoke it with the /ub-mode command. It is compatible with various AI coding agent environments, including Grok, Claude, and Cursor, and helps maintain a systematic workflow through context window management and small-unit commits.

This is suitable for developers who want to quantitatively control the quality of AI-generated code. It can be utilized by teams looking to build a workflow that manages code complexity and test fidelity using measurable metrics rather than abstract coding rules.