Best Product Design Software for Codex CLI

Moonchild is an AI-native product design workspace that turns product requirements, briefs, and rough ideas into production-ready interface screens and interactive prototypes. Instead of starting from a blank canvas, teams can paste a PRD, generate multi-screen user flows, explore several design directions, and compare the rationale behind each approach. Its chat-powered infinite canvas supports rapid iteration, visual edits, UX problem solving, and AI-assisted critique for hierarchy, accessibility, and consistency. Moonchild can use an existing design system by importing components and tokens from Figma, GitHub, or live websites, helping generated screens follow established visual rules rather than producing generic UI. Designers can refine results and export them to Figma, while product managers can visualize requirements early enough to identify gaps before development.