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Agent skill

E2E Tester

by hanzili in hanzili/hanzi-browse

Test a web app like a QA person — open it in a real browser, click through flows, and report what's broken with screenshots and code references.

Custom licenceAuto-check: notesTesting & QA

Install E2E Tester

skills CLI
$ npx skills add hanzili/hanzi-browse --skill e2e-tester -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install hanzili/hanzi-browse e2e-tester --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/hanzili/hanzi-browse.git skills-src && mkdir -p .claude/skills && cp -r skills-src/server/skills/e2e-tester .claude/skills/e2e-tester && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
e2e-tester
GitHub stars
177
Token cost
~1.6k tokens
SKILL.md length
818 words
Files
1
Skills in repo
12
Repo updated
First seen
Licence
Custom licence

At a glance

Test a web app like a QA person — open it in a real browser, click through flows, and report what's broken with screenshots and code references.

  • Works in 3 steps: Gather Context BEFORE Opening the Browser → Execute Tests in the Browser → Report Findings
  • The user wants to test their app
  • SKILL.md covers Tool Selection Rule, Before Starting — Preflight…, What You Need From the User and Safety: Check the Target…, plus 4 more sections
  • Calls git and curl

What it does

E2E Tester is an agent skill from hanzili/hanzi-browse. Test a web app like a QA person — open it in a real browser, click through flows, and report what's broken with screenshots and code references. Works on localhost. Use when the user wants to test their app, verify a flow works, check for visual bugs, or validate changes before pushing.

Its SKILL.md is about 1.6k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Testing & QA, covering End-to-end testing. It works with Chrome Extensions and Model Context Protocol. The repository describes itself as: let any ai agent use the local browser.

When your agent uses it

  • The user wants to test their app
  • Verify a flow works
  • Check for visual bugs
  • Validate changes before pushing

Example prompts

  • “/e2e-tester”

Workflow steps

3 steps, taken from the step headings in SKILL.md.

  1. Gather Context BEFORE Opening the Browser
  2. Execute Tests in the Browser
  3. Report Findings

What it can do on your machine

Read from SKILL.md and the folder at commit ce6e10d. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • git
    • curl

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Links to these hosts (documentation or services it may open):

    • chromewebstore.google.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

E2E Tester loads about 1.6k tokens when it runs. Until then it costs about 75 tokens; SKILL.md has 818 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~75
When it runs · the whole SKILL.md, loaded when a task matches
~1.6k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NoteMentions a .env fileSKILL.md:33
    st login if the app requires auth (check .env first)
  • NoteMentions a .env fileSKILL.md:50
    **Credentials from .env:**
  • NoteMentions a .env fileSKILL.md:51
    what you found: "Found a test account in .env.local (admin@test.com). OK to use it?"
  • NoteMentions a .env fileSKILL.md:67
    3. **Find test credentials**: Check `.env`, `.env.local`, seed files, test fixtures for test accounts. If you find crede
  • NoteMentions a .env fileSKILL.md:155
    - Don't silently use credentials from .env on non-local targets — confirm first

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 818 words (~1,648 tokens).

“You test web apps in a real browser and report findings. You're not a test script runner — you're a QA person who also understands the codebase.”

— opening of SKILL.md by hanzili, Custom licence
name
e2e-tester
category
productivity

Read the full SKILL.md on GitHub

Files

Just SKILL.md in server/skills/e2e-tester of hanzili/hanzi-browse.

Open the folder on GitHubat commit ce6e10d

Compare with similar skills

E2E Tester next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

E2E Tester compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
E2E Tester this skillhanzili/hanzi-browse177—~1.6kAutomated safety check: NotesCustom licence
E2Ecallstack/react-native-pager-view3.4k3 repos~2.1kAutomated safety check: PassMIT
Qwen Code E2E TestingQwenLM/qwen-code28k—~2.1kAutomated safety check: PassApache-2.0
E2EAgentsMesh/AgentsMesh2.4k—~629Automated safety check: NotesCustom licence
Debugging Opik E2E Testscomet-ml/opik22k—~1.8kAutomated safety check: PassApache-2.0
Playwright E2E Testsonyx-dot-app/onyx32k1 repos~2.8kAutomated safety check: NotesCustom licence

Similar skills

  • E2E

    callstack/react-native-pager-view

    Agentic end-to-end tests with e2e, the e2e runner. An agent skill from callstack/react-native-pager-view.

    3.4k GitHub starsUsed in 3 repos~2.1k tokens
    Testing & QAAuto-check passed

  • Qwen Code E2E Testing

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    Guides end-to-end testing of the Qwen Code CLI in headless mode with real model calls, MCP test servers and inspection of raw API traffic.

    28k GitHub stars~2.1k tokensUpdated today
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  • E2E

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    2.4k GitHub stars~629 tokensUpdated 17 days ago
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    22k GitHub stars~1.8k tokensUpdated yesterday
    Testing & QAAuto-check passed

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    onyx-dot-app/onyx

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    32k GitHub starsUsed in 1 repo~2.8k tokens
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Works with

Categories

Questions about E2E Tester

What does E2E Tester do?

Test a web app like a QA person — open it in a real browser, click through flows, and report what's broken with screenshots and code references. E2E Tester is an agent skill from hanzili/hanzi-browse. Test a web app like a QA person — open it in a real browser, click through flows, and report what's broken with screenshots and code references.

When should I use E2E Tester?

E2E Tester fits situations like: the user wants to test their app; verify a flow works; check for visual bugs; validate changes before pushing.

How do I install E2E Tester in Claude Code?

Run `npx skills add hanzili/hanzi-browse --skill e2e-tester -a claude-code`. Or copy the skill folder (server/skills/e2e-tester in hanzili/hanzi-browse) into .claude/skills/e2e-tester in your project. Claude Code loads it when a task matches its description.

How do I install E2E Tester in Codex?

Run `npx skills add hanzili/hanzi-browse --skill e2e-tester -a codex`. Or copy the skill folder (server/skills/e2e-tester in hanzili/hanzi-browse) into .agents/skills/e2e-tester in your project. Codex loads it when a task matches its description.

Can I use E2E Tester in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add hanzili/hanzi-browse --skill e2e-tester -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/e2e-tester, .gemini/skills/e2e-tester, .github/skills/e2e-tester and .opencode/skills/e2e-tester in your project.

What does E2E Tester need to run?

Going by SKILL.md and its folder, E2E Tester needs the command-line tools its instructions call (git and curl).

Does E2E Tester access the network?

SKILL.md names 1 domain. As links in the text: chromewebstore.google.com. This is read from the text; nothing was executed.

Is E2E Tester safe to install?

Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does E2E Tester use?

E2E Tester has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does E2E Tester use?

About 1.6k tokens (SKILL.md is roughly 6.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to E2E Tester?

Skills that share tags, products or a category with E2E Tester: E2E (callstack/react-native-pager-view, 3.4k stars), Qwen Code E2E Testing (QwenLM/qwen-code, 28k stars), E2E (AgentsMesh/AgentsMesh, 2.4k stars) and Debugging Opik E2E Tests (comet-ml/opik, 22k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains E2E Tester?

hanzili (a GitHub user) maintains it in hanzili/hanzi-browse, which has 177 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on April 25, 2026.

Source: hanzili/hanzi-browse on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.