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design-builder: Instructions file for Claude Code

CLAUDE.md

design-builder CLAUDE.md is an instructions file for Claude Code from app-builders-club/design-builder. It costs 1,658 tokens per session, scanned A, original, MIT.

A Claude Code plugin for designing and reviewing web pages and screens. It includes commands for setup, design, building, improvement, and review, plus connections to design tools such as Figma.

In plain words
What is it for?
Use it to plan web designs, create or improve screens, build from designs, and review the result for issues.
Why use it?
It gives a project a repeatable design workflow and a review step that reports visual or code problems by priority.

Instructions file for Claude Code

Written for Claude Code: Claude Code plugin machinery. Also seen: mentions subagents; mentions Claude Code.

This is app-builders-club/design-builder's own configuration. It tells Claude Code how to work on design-builder itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything design-builder configures →

not rated 4repo 2mo ago A scan 1,658 tokens original MIT
View source ↗ app-builders-club/design-builder
Reuse

Borrowing it

Nothing to install: this file belongs to app-builders-club/design-builder. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/app-builders-club/design-builder/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/app-builders-club/design-builder

Made for: Claude Code.

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README.md
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Per session 1,658 This file is loaded in full into every session.
When invoked 1,658 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.01658 $0.01658
Opus 5 $0.00829 $0.00829
Sonnet 5 $0.00332 $0.00332
Haiku 4.5 $0.00166 $0.00166

Measured 9d ago against content hash d89c298029cf, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

design-builder CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 79 lines

How it starts

The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.

design-builder Plugin

This repository is a Claude Code plugin: design-builder. It bundles 6 slash commands, the design knowledge skill plus sister knowledge skills (motion, playwright-cli, figma-use), and the design-auditor sub-agent.

Plugin manifest: .claude-plugin/plugin.json. Primary skill: skills/design/SKILL.md. Commands: commands/. Sub-agent: agents/design-auditor.md.

When the plugin is installed, users invoke commands as /design-builder:<command> — setup, start (alias of setup), design_page, design_screen, build, improve, review.

Structure

  • .claude-plugin/plugin.json — Claude Code manifest (name, version, mcpServers via .mcp.json, commands at ./commands/)
  • .claude-plugin/marketplace.json — single-plugin marketplace (so the repo itself is installable as a marketplace source)
  • .mcp.json — shared MCP server config (designlib + figma)
  • commands/ — 6 user-facing commands: setup.md, start.md (alias), design_page.md, design_screen.md, build.md, improve.md, review.md
  • agents/design-auditor.md — sole sub-agent. Used by /review. Returns P0-P3 report + JSON contract; supports visual / code_only / mixed modes; runs the AI-slop detector. Auto-captures running web apps via playwright-cli when the caller passes urls.
  • skills/design/SKILL.md — knowledge skill: 3-layer model, Layer 2 filters (incl. Distinctiveness Gate), Layer 1 source order, get_design_reference() resolver (defined in references/layer1-resolvers.md), reference index.
  • skills/design/references/ — deep documentation (architecture, layer1-resolvers, inspiration_pages, commands, distinctiveness-gate, design-dials, designlib-mcp, ux-writing, web/, ios/, figma/, brand/, design/, slides/, system/, design-system/, ui-styling/)
  • skills/design/data/ — CSV databases for BM25 search
  • skills/design/scripts/ — Python (search, design_system, system preview) + Node (anti-pattern detector). Stdlib only.
  • skills/design/templates/ — starters (iOS SwiftUI theme, web CSS/Tailwind/shadcn, brand-guidelines starter)
  • skills/motion/ — sister knowledge skill. Web-UI animation library knowledge (GSAP, WAAPI, CSS, Anime.js, Lottie, Three.js) + HyperFrames short-video pipeline. Loaded by design and the relevant commands.
  • skills/playwright-cli/ — sister knowledge skill. Browser automation via @playwright/cli. Used by /review (auto-screenshots of running web apps) and /improve --restructure (captures live inspiration_pages references). Runtime: npx @playwright/cli, no local install.
  • skills/figma-use/ — Figma Plugin API wrapper (mandatory prerequisite for any use_figma write).
  • NOTICE.md — attribution for 6 source open-source projects + Figma MCP guide
  • LICENSE — MIT
  • CHANGELOG.md — version history

Read the full file on GitHub · 79 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 79 lines · 1,658 tokens per session scan A d89c298029cf

Subscribe to this mod's changes

design-builder CLAUDE.md is an instructions file published in the GitHub repository app-builders-club/design-builder (4 stars, last pushed 2mo ago), licensed MIT. It adds 1,658 tokens to every session, about $0.0083 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Design and UXFrontendclaude-code-plugindesign-skill
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