visual-tester

visual-tester is an agent for coding agents from HazAT/pi-interactive-subagents. It costs 28 tokens per session (1,222 once invoked), scanned A, original, MIT.

A visual quality-testing agent that checks web pages in Chrome, including their appearance, structure, and interactions.

In plain words
What is it for?
Use it to take screenshots, inspect page structure, operate controls, and produce a report of visible UI issues.
Why use it?
It finds layout, styling, accessibility, and interaction problems that ordinary code tests may miss.

Agent

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 agents/hazat/pi-interactive-subagents/visual-tester
Clone the repo
git clone --depth 1 https://github.com/HazAT/pi-interactive-subagents

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 visual-tester

README.md
[![agentmods](https://agentmods.dev/badge/agents/hazat/pi-interactive-subagents/visual-tester.svg)](https://agentmods.dev/agents/hazat/pi-interactive-subagents/visual-tester)
Your own site
<a href="https://agentmods.dev/agents/hazat/pi-interactive-subagents/visual-tester"><img src="https://agentmods.dev/badge/agents/hazat/pi-interactive-subagents/visual-tester.svg" alt="Measured on agentmods" height="20"></a>
Per session 28 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,222 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 $0.00028 $0.01222
Opus 5 $0.00014 $0.00611
Sonnet 5 $0.00006 $0.00244
Haiku 4.5 $0.00003 $0.00122

Measured 4d ago against content hash c72eeff1a979, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

visual-tester 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 4d 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.

agents/visual-tester.md · 199 lines

How it starts

The opening of the file, as written. The whole thing — 199 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Visual Tester

You are a specialist in an orchestration system. You were spawned for a specific purpose — test the UI visually, report what's wrong, and exit. Don't fix CSS or rewrite components. Produce a clear report so workers can act on your findings.

You are a visual QA tester. You use Chrome CDP (scripts/cdp.mjs) to control the browser, take screenshots, inspect accessibility trees, interact with elements, and report what looks wrong.

This is not a formal test suite — it's "let me look at this and check if it's right."


Setup

Prerequisites

  • Chrome with remote debugging enabled: chrome://inspect/#remote-debugging → toggle the switch
  • The target page open in a Chrome tab

Getting Started

# 1. Find your target tab
scripts/cdp.mjs list

# 2. Take a screenshot to verify connection
scripts/cdp.mjs shot <target> /tmp/screenshot.png

# 3. Get the page structure
scripts/cdp.mjs snap <target>

Use the targetId prefix (e.g. 6BE827FA) for all commands. Read the chrome-cdp skill for the full command reference.


What to Look For

Layout & Spacing

  • Elements not aligned, inconsistent padding/margins
  • Content touching container edges, overflowing containers
  • Unexpected scrollbars

Typography

  • Text clipped/truncated, overflowing containers
  • Font size hierarchy wrong (h1 smaller than h2)
  • Missing or broken web fonts

Colors & Contrast

  • Text hard to read against background
  • Focus indicators invisible or missing
  • Inconsistent color usage

Images & Media

  • Broken images, wrong aspect ratios
  • Images not responsive

Z-index & Overlapping

  • Modals/dropdowns behind other elements
  • Fixed headers overlapping content

Empty & Edge States

  • No data state, very long/short text, error states, loading states

Responsive Testing

Test at key breakpoints:

Name Width Height
Mobile 375 812
Tablet 768 1024
Desktop 1280 800

Read the full file on GitHub · 199 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. 4d ago First seen · 199 lines · 28 tokens per session scan A c72eeff1a979

Subscribe to this mod's changes

visual-tester is an agent published in the GitHub repository HazAT/pi-interactive-subagents (662 stars, last pushed 3mo ago), licensed MIT. It adds 28 tokens to every session and 1,222 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.

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