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.
npx agentmods add skills/diillson/chatcli/webapp-testingnpx skills add diillson/chatcli --skill webapp-testinggit clone --depth 1 https://github.com/diillson/chatcliWrote 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.
[](https://agentmods.dev/skills/diillson/chatcli/webapp-testing)<a href="https://agentmods.dev/skills/diillson/chatcli/webapp-testing"><img src="https://agentmods.dev/badge/skills/diillson/chatcli/webapp-testing.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00020 | $0.00925 |
| Opus 5 | $0.00010 | $0.00463 |
| Sonnet 5 | $0.00004 | $0.00185 |
| Haiku 4.5 | $0.00002 | $0.00093 |
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 yesterday.
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.
This is a copy
88% identical to webapp-testing — 2 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.
How it starts
The opening of the file, as written. The whole thing — 188 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Web App Testing
Discover and test everything. Leave no route untested.
🔧 Runtime Scripts
Execute these for automated browser testing:
| Script | Purpose | Usage |
|---|---|---|
scripts/playwright_runner.py |
Basic browser test | python scripts/playwright_runner.py https://example.com |
| With screenshot | python scripts/playwright_runner.py <url> --screenshot |
|
| Accessibility check | python scripts/playwright_runner.py <url> --a11y |
Requires: pip install playwright && playwright install chromium
1. Deep Audit Approach
Discovery First
| Target | How to Find |
|---|---|
| Routes | Scan app/, pages/, router files |
| API endpoints | Grep for HTTP methods |
| Components | Find component directories |
| Features | Read documentation |
Systematic Testing
- Map - List all routes/APIs
- Scan - Verify they respond
- Test - Cover critical paths
2. Testing Pyramid for Web
/\ E2E (Few)
/ \ Critical user flows
/----\
/ \ Integration (Some)
/--------\ API, data flow
/ \
/------------\ Component (Many)
Individual UI pieces
3. E2E Test Principles
What to Test
| Priority | Tests |
|---|---|
| 1 | Happy path user flows |
| 2 | Authentication flows |
| 3 | Critical business actions |
| 4 | Error handling |
E2E Best Practices
| Practice | Why |
|---|---|
| Use data-testid | Stable selectors |
| Wait for elements | Avoid flaky tests |
| Clean state | Independent tests |
| Avoid implementation details | Test user behavior |
4. Playwright Principles
Core Concepts
| Concept | Use |
|---|---|
| Page Object Model | Encapsulate page logic |
| Fixtures | Reusable test setup |
| Assertions | Built-in auto-wait |
| Trace Viewer | Debug failures |
Configuration
| Setting | Recommendation |
|---|---|
| Retries | 2 on CI |
| Trace | on-first-retry |
| Screenshots | on-failure |
| Video | retain-on-failure |
What ships with it
1 file 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.
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.
- yesterday First seen · 188 lines · 20 tokens per session scan A aa05117912ef
webapp-testing is a skill published in the GitHub repository diillson/chatcli (89 stars, last pushed today), licensed Apache-2.0. It adds 20 tokens to every session and 925 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 88% identical to webapp-testing, differing in 2 lines, and is treated as a copy.
Other skills, from other repositories
11-browser-qa
Run post-review browser QA and produce short named videos for a locked happy path and sourced browser edge cases. Use when the user wants concise reviewer evidence for a web journey. Not for API, CLI, automated tests, diff review, or application fixes.
06-test
Write and iterate tests until they pass, or validate a user journey end to end in the browser. Use when the user wants to add coverage, find what's untested, or walk a flow. Not for auditing test health or debugging a failure.
langbot-testing
Test LangBot WebUI and core product flows with an automated browser and backend logs. Use when validating the configured LangBot frontend, pipeline Debug Chat, model provider setup and test buttons, bot and knowledge-base UI flows, or troubleshooting failed LangBot end-to-end tests.
penguin-harness-manual-test
Use when standing PenguinHarness up to try a change by hand — launching the Web App, the desktop shell, the landing page or the docs site to click through it, screenshot it, or reproduce a report. Covers the four dev entry points and their ports, which data root each writes to, and the four ways a healthy setup looks…
browser-testing-with-screenshots
Use when testing web applications with visual verification - automates Chrome browser interactions, element selection, and screenshot capture for confirming UI functionality.
aidd-dev:05:test
Write and iterate on tests until they pass, and validate user journeys end-to-end in the browser.