An interactive generator for responsive web layouts using Flexbox or CSS Grid, two CSS systems for arranging elements on a page. It produces previewable layout code for patterns such as cards, sidebars, navigation bars, and dashboards.

Use it to create starting layouts for navigation, card grids, dashboards, magazine-style pages, and common multi-column designs.

It reduces the time spent working out layout structure and responsive behavior from scratch.

css-layout — Command by andronics

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add commands/andronics/claude-plugin-css-pro/css-layout

Clone the repo

git clone --depth 1 https://github.com/andronics/claude-plugin-css-pro

Per session 12 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 2,147 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

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.

Model	Per session	Once invoked
Fable 5	$0.00012	$0.02147
Opus 5	$0.00006	$0.01073
Sonnet 5	$0.00002	$0.00429
Haiku 4.5	$0.00001	$0.00215

Measured yesterday against content hash c9f98c6b9fb3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

css-layout 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 yesterday.

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.

commands/css-layout.md · 428 lines

How it starts

The opening of the file, as written. The whole thing — 428 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Interactive Layout Generator

I'll help you create responsive layouts using Flexbox or CSS Grid through an interactive process.

Arguments

/css-layout [layout-type]

layout-type (optional):

flexbox - Create Flexbox layout
grid - Create CSS Grid layout
holy-grail - Classic 3-column layout
sidebar - Sidebar + content layout
cards - Responsive card grid
navbar - Navigation bar layout
dashboard - Dashboard grid layout
(omit for interactive selection)

Layout Types I Can Create

1. Flexbox Layouts

Navigation Bar

Horizontal navigation
Logo, menu items, action buttons
Responsive mobile menu

Card Row

Flexible card container
Auto-wrapping cards
Equal heights

Centered Content

Vertical and horizontal centering
Full viewport height
Responsive sizing

Holy Grail

Header, footer, sidebar, main content
Flexible height distribution
Responsive stacking

2. CSS Grid Layouts

Responsive Grid

Auto-fitting columns
No media queries needed
Minimum card size

Dashboard Layout

Named grid areas
Complex arrangements
Responsive breakpoints

Magazine Layout

Asymmetric grid
Spanning cells
Feature areas

Masonry-style

Pinterest-like layout
Variable heights
Dense packing

Interactive Process

I'll ask you these questions:

What are you building?
- Navigation, content grid, page layout, etc.
How many items/sections?
- Number of columns, rows, or components
Responsive behavior?
- Mobile-first, breakpoints, stacking order
Spacing requirements?
- Gap between items, padding, margins
Sizing constraints?
- Fixed widths, min/max sizes, flexible areas

Example: Card Grid

Me: What kind of layout do you need?

You: I need a responsive card grid that shows 1 column on mobile, 2 on tablet, 3 on desktop.

Me: Here's your layout:

<div class="card-grid">
  <div class="card">Card 1</div>
  <div class="card">Card 2</div>
  <div class="card">Card 3</div>
  <!-- More cards -->
</div>

Read the full file on GitHub · 428 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.

yesterday First seen · 428 lines · 12 tokens per session scan A c9f98c6b9fb3

Subscribe to this mod's changes

css-layout is a command published in the GitHub repository andronics/claude-plugin-css-pro (2 stars, last pushed 10mo ago), licensed MIT. It adds 12 tokens to every session and 2,147 once invoked, about $0.0001 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.

Analytics and metrics Frontend

css-layout