MockupLM

MockupLM is a Frontend skill for Claude Code, published by nimbalyst in nimbalyst.

1.5K stars212 forkson nimbalyst/nimbalystAdded 2026/08/19+3% in starsRepository updated 2026/08/19

agentic-aiai-agentsclaude-codecodexcoding-agentdeveloper-toolsidemarkdown-editormcpmulti-agent-systemsopencodewysiwyg-editor

Install in seconds

Install MockupLM

Copy MockupLM into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/nimbalyst/nimbalyst/tree/main/packages/extensions/mockuplm/claude-plugin/skills/mockuplm ~/.claude/skills/mockuplm

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/nimbalyst/nimbalyst.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: packages/extensions/mockuplm/claude-plugin/skills/mockuplm/SKILL.md in nimbalyst/nimbalyst
Installs to: ~/.claude/skills/mockuplm
Collection: One of 7 skills cataloged from this repository
Category: Frontend — 567 skills

What MockupLM does

MockupLM creates visual UX mockups as standalone HTML/CSS files for planning UI features, wireframes, and visual layouts. Use it to communicate design ideas visually before implementation.

MockupLM is cataloged under Frontend on DirSkills. MockupLM comes from a repository tagged agentic-ai, ai-agents, claude-code, codex and coding-agent.

Documentation

README

Excerpt

MockupLM - Visual Planning

MockupLM is Nimbalyst's visual mockup system for UI/UX design and planning. Create .mockup.html files with HTML and inline CSS to share and iterate on designs with users.

When to Use MockupLM

Planning new UI features or screens
Designing layouts and visual hierarchy
Creating wireframes or prototypes
Visualizing proposed changes to existing screens
Any situation where visual communication helps

Do NOT use for implementation - MockupLM is for planning only. If you're implementing actual code, don't create mockup files.

This is the opening of the README. Read the full README on GitHub.

Frequently asked about MockupLM

What else does nimbalyst publish alongside MockupLM?
MockupLM is one of 7 skills that DirSkills catalogs from nimbalyst/nimbalyst, the repository it ships in. Its siblings there include DataModelLM, Excalidraw and Feedback Intake. Each one is a separate skill with its own page in this directory, installs the same way MockupLM does, and is maintained by nimbalyst in that same repository. The rest of the collection is listed on the nimbalyst/nimbalyst page.
How does MockupLM compare to other Frontend skills?
MockupLM ranks #280 by stars among the 567 Frontend skills in this catalog. The most-starred ones next to it are Angular Developer, Android Clean Architecture and Accessibility. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of MockupLM against them. Open each page to compare what they document and how they install.