browser-qa

browser-qa is a skill for Claude Code, Codex from metaspartan/cybara. It costs 22 tokens per session (242 once invoked), scanned A, original, MIT.

A browser-based quality check for web applications, covering pages, interactions, different screen sizes, console messages, accessibility, themes, and screenshots.

In plain words
What is it for?
Starting the app, testing its main user flow with real browser actions, checking desktop and narrow views, and inspecting finished screenshots.
Why use it?
It catches problems that reading source code cannot reveal, such as broken clicks, layout clipping, keyboard-focus issues, and browser errors.

Skill for Claude CodeCodex

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 skills/metaspartan/cybara/browser-qa
Any agent
npx skills add metaspartan/cybara --skill browser-qa
Clone the repo
git clone --depth 1 https://github.com/metaspartan/cybara

Made for: Claude Code, Codex.

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.

agentmods badge for browser-qa

README.md
[![agentmods](https://agentmods.dev/badge/skills/metaspartan/cybara/browser-qa.svg)](https://agentmods.dev/skills/metaspartan/cybara/browser-qa)
Your own site
<a href="https://agentmods.dev/skills/metaspartan/cybara/browser-qa"><img src="https://agentmods.dev/badge/skills/metaspartan/cybara/browser-qa.svg" alt="Measured on agentmods" height="20"></a>
Per session 22 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 242 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.

ModelPer sessionOnce invoked
Fable 5 $0.00022 $0.00242
Opus 5 $0.00011 $0.00121
Sonnet 5 $0.00004 $0.00048
Haiku 4.5 $0.00002 $0.00024

Measured 5d ago against content hash 26b031ae7393, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

browser-qa 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 5d 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.

plugins/browser-quality/skills/browser-qa/SKILL.md · 26 lines

What it actually says

Browser quality

Use the embedded browser for interactive validation when a task changes or audits a web interface.

Workflow

  1. Start the application with the repository's existing Bun script and wait for its health endpoint or listening address.
  2. Open the application in the embedded browser and confirm the initial page renders without console errors.
  3. Exercise the primary workflow with real clicks, typing, navigation, and state changes.
  4. Repeat the workflow at representative desktop and narrow viewport sizes.
  5. Capture screenshots of the meaningful finished states and inspect them for clipping, overlap, empty regions, and broken assets.
  6. Verify keyboard focus order, accessible labels, reduced motion, and light and dark theme behavior when supported.
  7. Report the tested URL, viewport sizes, interactions, console failures, and screenshot paths.

Reliability

  • Wait on observable UI state instead of fixed sleeps.
  • Reuse the current embedded browser session so the user can follow the run.
  • Do not claim visual correctness from source inspection alone.
  • Keep authentication and destructive actions within the user's stated scope.
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. 5d ago First seen · 26 lines · 22 tokens per session scan A 26b031ae7393

Subscribe to this mod's changes

browser-qa is a skill published in the GitHub repository metaspartan/cybara (26 stars, last pushed today), licensed MIT. It adds 22 tokens to every session and 242 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 2026-08-30.