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Ub Mode
Ub Mode is an agent skill that enforces disciplined software engineering principles when writing or changing code.
Ub mode is an agent skill that enforces disciplined software engineering principles when writing or changing code. It is loosely based on portions of rules by poteto, reduced and paired with deterministic quality-gate tools. The workflow follows two main phases: first make it work through foundational thinking, TDD, and architecture, then make it right by fixing root causes and testing behavior. It integrates tools like mutator for mutation testing and uml-viewer for visualizing components, coverage, and metrics. Users install it by copying SKILL.md into their agent directory and invoking the skill.
Ub Mode at a glance
Key features
- Enforces disciplined software engineering principles
- Applies laziness protocol and foundational thinking
- Uses test-driven development and domain modeling
- Runs mutation testing to expose uncovered code
- Visualizes components, coverage, and dependency directions
Use it for
- Writing code with disciplined engineering principles
- Changing code using test-driven development
- Running mutation testing to find surviving mutants
- Visualizing components and code coverage
Alternatives to Ub Mode
- Agent Skills — Encodes senior-engineer workflows and quality gates into 24 skills.
- Fable Mode — It enforces structural execution discipline and verifiability for Claude.
- AGENTS.md — It separates agent-specific instructions from human-focused README files.
- bb — Runs locally with support for multiple AI models and full customization.
- Context Mode — Saves up to 98 percent of context per session by keeping raw data out of the LLM.
- Waza — Embeds structured engineering habits into AI agents to prevent generic, imprecise output.
- Modeinspect — Designs directly in your codebase with 1:1 components and design systems.
- Weft — It enables safe parallel coding agent work without file locks.
- Unblocked — Reasons across all organizational sources to provide verified context for AI agents.
- Darwin Skill — It autonomously optimizes agent skills through a validation-gated ratchet mechanism.
- Pristine — Polishes web UI to a high standard using AI agent commands.
- Aegis — It ensures AI coding agents work against verified baselines and proof.
All Ub Mode alternatives