What is responsiveness-checker?

A browser-based check for whether a website layout works at different screen widths. It tests 375, 768, 1280, and 1920 pixels, commonly representing phone, tablet, laptop, and large desktop screens.

Testing responsive website layouts, often with Playwright, alongside a separate visual-review process.

It finds layout problems caused by screen size, such as content overflowing or controls becoming hard to use. It checks measurable sizing issues rather than judging visual style.

How RekaWeb3Design/designer-20-starter-system configures Cursor

Reuse

Borrowing it

Nothing to install: this file belongs to RekaWeb3Design/designer-20-starter-system. 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/RekaWeb3Design/designer-20-starter-system/main/.cursor/skills/tech-bridge/responsiveness-checker/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/RekaWeb3Design/designer-20-starter-system

Made for: Cursor.

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/skills/rekaweb3design/designer-20-starter-system/responsiveness-checker/github.svg)](https://agentmods.dev/skills/rekaweb3design/designer-20-starter-system/responsiveness-checker)

Your own site

<a href="https://agentmods.dev/skills/rekaweb3design/designer-20-starter-system/responsiveness-checker"><img src="https://agentmods.dev/badge/skills/rekaweb3design/designer-20-starter-system/responsiveness-checker/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/skills/rekaweb3design/designer-20-starter-system/responsiveness-checker"><img src="https://agentmods.dev/badge/skills/rekaweb3design/designer-20-starter-system/responsiveness-checker.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 203 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 unknown 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	$0.00039	$0.00203
Opus 5.5	$0.00016	$0.00081
Sonnet 5.5	$0.00008	$0.00041
Haiku 4.5	$0.00004	$0.00020

Measured 2mo ago against content hash 3d5e2336a5dc, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

responsiveness-checker 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.

.cursor/skills/tech-bridge/responsiveness-checker/SKILL.md · 26 lines

The source is not reproduced here

No licence file

Read it on GitHub

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 · 26 lines · 39 tokens per session scan A 3d5e2336a5dc

Subscribe to this mod's changes

responsiveness-checker is a skill published in the GitHub repository RekaWeb3Design/designer-20-starter-system (3 stars, last pushed 3mo ago), with no licence file. It adds 39 tokens to every session and 203 once invoked, about $0.0002 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 2026-08-31.

Browser automation Frontend

responsiveness-checker next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
responsiveness-checkerRekaWeb3Design/designer-20-starter-system	Skill	3	3mo ago	none	A	39	Cursor
interactive-loginyc-software/qm	Skill	16k	yesterday	MIT	A	46	Claude Code, Codex
pinchtab-mcppinchtab/pinchtab	Skill	11k	10d ago	MIT	A	52	Claude Code, Codex
azure-messaging-webpubsub-javamicrosoft/skills	Skill	3.2k	yesterday	MIT	A	43	Claude Code
cua-driverdavidondrej/skills	Skill	4.3k	3d ago	MIT	A	68	Claude Code, Codex
open-design-browsercompozy/compozy	Skill	2.8k	yesterday	MIT	A	56	Claude Code, Codex
southwestborski/travel-hacking-toolkit	Skill	895	today	MIT	A	40	Claude Code

designer-20-starter-system: Skill for Cursor