pbakaus/impeccable

What it solves

Impeccable provides design guidance and quality control for AI coding agents to prevent them from producing generic, repetitive, and low-quality frontend designs (such as overused fonts, repetitive card layouts, and poor color choices). It establishes a shared design vocabulary and deterministic rules to ensure AI-generated UIs are professional and visually distinct.

How it works

It functions as a "skill" that can be installed into various AI coding tools (like Cursor, Claude Code, GitHub Copilot, and others). It uses a combination of:

• Durable Product Truth: A PRODUCT.md file created via /impeccable init to store the project's audience, purpose, and constraints.
• Design Commands: 23 specific commands (e.g., /impeccable polish, /impeccable audit, /impeccable animate) that give the AI a precise design vocabulary.
• Deterministic Detector: A CLI and browser extension that run 61 rules to detect design anti-patterns without needing an LLM API key.
• Design Hooks: Native hooks that integrate into the agent's workflow to scan UI file edits and surface design findings back to the AI agent in real-time.

Who it’s for

Frontend developers and designers working with AI coding agents who want to move beyond generic "SaaS-style" AI outputs and achieve high-fidelity, professional UI/UX.

Highlights

• Broad Tool Support: Compatible with a wide array of agents including Claude Code, Cursor, Codex, GitHub Copilot, Grok Build, and Gemini CLI.
• Deterministic Rules: 61 rules that identify design flaws without relying on LLM inference.
• Live Iteration: A /impeccable live mode for iterating on visual variants directly in the browser.
• Anti-Pattern Guidance: Explicit instructions to avoid common AI design tells like pure black/gray or nested cards.