webapp-testing

webapp-testing is a skill for Claude Code, Codex from kivo360/OmoiOS. It costs 35 tokens per session (884 once invoked), scanned A, a copy of webapp-testing, Apache-2.0.

A toolkit for testing local web applications in a real browser with Playwright. Playwright is a browser-automation tool that can click through pages, inspect results, and capture browser evidence.

In plain words
What is it for?
Use it to test frontend interactions, debug user-interface behaviour, take screenshots, inspect browser logs, and start or manage the local application server during tests.
Why use it?
It helps verify that the interface works as expected and makes it easier to investigate visual problems, browser errors, and unexpected behaviour.

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/kivo360/omoios/webapp-testing
Any agent
npx skills add kivo360/OmoiOS --skill webapp-testing
Clone the repo
git clone --depth 1 https://github.com/kivo360/OmoiOS

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 webapp-testing

README.md
[![agentmods](https://agentmods.dev/badge/skills/kivo360/omoios/webapp-testing.svg)](https://agentmods.dev/skills/kivo360/omoios/webapp-testing)
Your own site
<a href="https://agentmods.dev/skills/kivo360/omoios/webapp-testing"><img src="https://agentmods.dev/badge/skills/kivo360/omoios/webapp-testing.svg" alt="Measured on agentmods" height="20"></a>
Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 884 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.00035 $0.00884
Opus 5 $0.00017 $0.00442
Sonnet 5 $0.00007 $0.00177
Haiku 4.5 $0.00003 $0.00088

Measured 4d ago against content hash 51b7349e77ec, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

webapp-testing 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.

The scan reads SKILL.md. This mod also ships 4 executable files (examples/console_logging.py, examples/element_discovery.py, examples/static_html_automation.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Origin

This is a copy

100% identical to webapp-testing — 3 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/skills/webapp-testing/SKILL.md · 96 lines

How it starts

The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Web Application Testing

To test local web applications, write native Python Playwright scripts.

Helper Scripts Available:

  • scripts/with_server.py - Manages server lifecycle (supports multiple servers)

Always run scripts with --help first to see usage. DO NOT read the source until you try running the script first and find that a customized solution is abslutely necessary. These scripts can be very large and thus pollute your context window. They exist to be called directly as black-box scripts rather than ingested into your context window.

Decision Tree: Choosing Your Approach

User task → Is it static HTML?
    ├─ Yes → Read HTML file directly to identify selectors
    │         ├─ Success → Write Playwright script using selectors
    │         └─ Fails/Incomplete → Treat as dynamic (below)
    │
    └─ No (dynamic webapp) → Is the server already running?
        ├─ No → Run: python scripts/with_server.py --help
        │        Then use the helper + write simplified Playwright script
        │
        └─ Yes → Reconnaissance-then-action:
            1. Navigate and wait for networkidle
            2. Take screenshot or inspect DOM
            3. Identify selectors from rendered state
            4. Execute actions with discovered selectors

Example: Using with_server.py

To start a server, run --help first, then use the helper:

Single server:

python scripts/with_server.py --server "npm run dev" --port 5173 -- python your_automation.py

Multiple servers (e.g., backend + frontend):

python scripts/with_server.py \
  --server "cd backend && python server.py" --port 3000 \
  --server "cd frontend && npm run dev" --port 5173 \
  -- python your_automation.py

To create an automation script, include only Playwright logic (servers are managed automatically):

from playwright.sync_api import sync_playwright

with sync_playwright() as p:
    browser = p.chromium.launch(headless=True) # Always launch chromium in headless mode
    page = browser.new_page()
    page.goto('http://localhost:5173') # Server already running and ready
    page.wait_for_load_state('networkidle') # CRITICAL: Wait for JS to execute
    # ... your automation logic
    browser.close()

Read the full file on GitHub · 96 lines

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 96 lines · 35 tokens per session scan A 51b7349e77ec

Subscribe to this mod's changes

webapp-testing is a skill published in the GitHub repository kivo360/OmoiOS (75 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 35 tokens to every session and 884 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to webapp-testing, differing in 3 lines, and is treated as a copy.

Related

Other skills, from other repositories

self-awareness

Use when the user asks about Archie itself — what Archie is, how it works, what it can or cannot do, what agents or domains exist, how plugins work, how requests get handled, why something behaves a certain way, what integrations are available, or whether Archie can change itself. Triggers on phrases like "what can…

sweatco/archie-hq · 148 tokens

archie-e2e

Boot a live Archie instance from the current branch, drive E2E scenarios headlessly through the archie-debug MCP (nonce → createtask → waitfortask → approve), capture per-scenario evidence files, and tear down cleanly. Use for Forge Stage 4 QA, verifying a branch against a live instance, running the basic or edit-mode…

sweatco/archie-hq · 106 tokens

openspec-explore

Enter explore mode - a thinking partner for exploring ideas, investigating problems, and clarifying requirements. Use when the user wants to think through something before or during a change.

sweatco/archie-hq · 39 tokens

writing-plugins

Read this before authoring or substantially changing a plugin, agent, or skill for Archie. It's the conceptual playbook for building plugins that fit Archie's multi-agent, single-orchestrator model — what a plugin must respect, why every plugin usually needs an orchestrator-facing skill, and how to think about agents…

sweatco/archie-hq · 137 tokens

triggers

Set up, list, or manage triggers — persistent "do Y when X happens" rules. Use when someone asks Archie to do something on a schedule ("every weekday at 9am…", "every morning post…", "remind the channel weekly…"), to react to new messages in a channel ("whenever someone posts X in.

sweatco/archie-hq · 71 tokens

thread-conduct

Use before posting anywhere outside this task's own thread, or when deciding how much to post inside it. Covers keeping one task in one thread, what to do with a finding that belongs to another team, when a cross-channel post is allowed and how small it must be, how much traffic a thread should carry, and how to…

sweatco/archie-hq · 103 tokens