What is css-safety-check?

A CSS review command that checks website stylesheets for browser compatibility, performance impact, accessibility, and common practices. CSS is the code that controls a web page's visual presentation.

Use it to validate CSS before release and reduce visual regressions, such as unexpected changes to how pages look.

It helps catch styling problems and accessibility issues before a website is deployed.

How GGPrompts/ClaudeGlobalCommands configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to GGPrompts/ClaudeGlobalCommands. 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/GGPrompts/ClaudeGlobalCommands/main/.claude/commands/workflows/css-safety-check.md

Clone the repo

git clone --depth 1 https://github.com/GGPrompts/ClaudeGlobalCommands

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/commands/ggprompts/claudeglobalcommands/css-safety-check/github.svg)](https://agentmods.dev/commands/ggprompts/claudeglobalcommands/css-safety-check)

Your own site

<a href="https://agentmods.dev/commands/ggprompts/claudeglobalcommands/css-safety-check"><img src="https://agentmods.dev/badge/commands/ggprompts/claudeglobalcommands/css-safety-check/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/commands/ggprompts/claudeglobalcommands/css-safety-check"><img src="https://agentmods.dev/badge/commands/ggprompts/claudeglobalcommands/css-safety-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 9 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 60 The whole file, excluding the scripts and references it only reads on demand.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00009	$0.00060
Opus 5.5	$0.00004	$0.00024
Sonnet 5.5	$0.00002	$0.00012
Haiku 4.5	$0.00001	$0.00006

Measured 2mo ago against content hash 76b315c082b8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

css-safety-check 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 2mo 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/commands/workflows/css-safety-check.md · 16 lines

What it actually says

CSS Safety Check

Token Estimate: ~3.5k

Validates CSS before deployment:

Browser compatibility
Performance impact
Accessibility (WCAG)
Best practices

Prevents visual regressions.

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.

2mo ago First seen · 16 lines · 9 tokens per session scan A 76b315c082b8

Subscribe to this mod's changes

css-safety-check is a command published in the GitHub repository GGPrompts/ClaudeGlobalCommands (128 stars, last pushed 11mo ago), licensed MIT. It adds 9 tokens to every session and 60 once invoked, about $0.0000 per session on Opus 5.5. 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 2026-08-30.

CSS and styling Frontend

css-safety-check next to 6 commands from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
css-safety-checkGGPrompts/ClaudeGlobalCommands	Command	128	11mo ago	MIT	A	9	Claude Code
/a11y-auditgonzalezpazmonica/pm-workspace	Command	51	5d ago	MIT	A	75	Claude Code
color-specialistimsaif/design-with-claude	Command	11	yesterday	MIT	A	35	Claude Code
responsive-design-specialistimsaif/design-with-claude	Command	11	yesterday	MIT	A	36	Claude Code
wcag-auditchristopherlouet/claude-base	Command	5	6d ago	MIT	A	0	Claude Code
revisar-uiluanpdd/kit-mcp	Command	5	4d ago	MIT	A	19	Claude Code
frontend-designqorstack/qorstack-report	Command	42	17d ago	none	A	0	Claude Code

ClaudeGlobalCommands: Command for Claude Code