Web Application Testing
anthropics/skills
Tests local web applications with Python Playwright scripts, checking frontend behavior, capturing screenshots and reading browser console logs.
A skill your agent uses when about to write or modify a Playwright e2e spec under packages/danmaku-anywhere/e2e/.
Install E2E Spec
$ npx skills add Mr-Quin/danmaku-anywhere --skill e2e-spec -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Mr-Quin/danmaku-anywhere e2e-spec --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/Mr-Quin/danmaku-anywhere.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/e2e-spec .claude/skills/e2e-spec && rm -rf skills-srcUse ~/.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/
Install the "e2e-spec" agent skill from https://github.com/Mr-Quin/danmaku-anywhere/tree/master/.claude/skills/e2e-spec into .claude/skills/e2e-spec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "e2e-spec", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/Mr-Quin/danmaku-anywhere/tree/master/.claude/skills/e2e-specType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add Mr-Quin/danmaku-anywhere --skill e2e-spec -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Mr-Quin/danmaku-anywhere e2e-spec --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Mr-Quin/danmaku-anywhere.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/e2e-spec .agents/skills/e2e-spec && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "e2e-spec" agent skill from https://github.com/Mr-Quin/danmaku-anywhere/tree/master/.claude/skills/e2e-spec into .agents/skills/e2e-spec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "e2e-spec", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add Mr-Quin/danmaku-anywhere --skill e2e-spec -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Mr-Quin/danmaku-anywhere e2e-spec --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Mr-Quin/danmaku-anywhere.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/e2e-spec .cursor/skills/e2e-spec && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "e2e-spec" agent skill from https://github.com/Mr-Quin/danmaku-anywhere/tree/master/.claude/skills/e2e-spec into .cursor/skills/e2e-spec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "e2e-spec", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/Mr-Quin/danmaku-anywhere.git --path .claude/skills/e2e-spec--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add Mr-Quin/danmaku-anywhere --skill e2e-spec -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Mr-Quin/danmaku-anywhere e2e-spec --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Mr-Quin/danmaku-anywhere.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/e2e-spec .gemini/skills/e2e-spec && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "e2e-spec" agent skill from https://github.com/Mr-Quin/danmaku-anywhere/tree/master/.claude/skills/e2e-spec into .gemini/skills/e2e-spec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "e2e-spec", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install Mr-Quin/danmaku-anywhere e2e-specInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add Mr-Quin/danmaku-anywhere --skill e2e-spec -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Mr-Quin/danmaku-anywhere.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/e2e-spec .github/skills/e2e-spec && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "e2e-spec" agent skill from https://github.com/Mr-Quin/danmaku-anywhere/tree/master/.claude/skills/e2e-spec into .github/skills/e2e-spec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "e2e-spec", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add Mr-Quin/danmaku-anywhere --skill e2e-spec -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Mr-Quin/danmaku-anywhere e2e-spec --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Mr-Quin/danmaku-anywhere.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/e2e-spec .opencode/skills/e2e-spec && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "e2e-spec" agent skill from https://github.com/Mr-Quin/danmaku-anywhere/tree/master/.claude/skills/e2e-spec into .opencode/skills/e2e-spec/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "e2e-spec", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
e2e-spec- GitHub stars
- 547
- Token cost
- ~1.3k tokens
- SKILL.md length
- 738 words
- Files
- 1
- Skills in repo
- 9
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
A skill your agent uses when about to write or modify a Playwright e2e spec under packages/danmaku-anywhere/e2e/.
- Works in 7 steps: Every spec asserts at least one… → The deciding question: if you removed… → Standard shape: seed via dev API → drive… → …
- Modify a Playwright e2e spec under packages/danmaku-anywhere/e2e/
- SKILL.md covers The load-bearing rules (don't…, Baselines that fail tests…, Anti-patterns AGENTS.md calls… and Migration specs are a separate…, plus 3 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
E2E Spec is an agent skill from Mr-Quin/danmaku-anywhere. Use when about to write or modify a Playwright e2e spec under packages/danmaku-anywhere/e2e/. Points at the canonical doctrine and surfaces the load-bearing rules so the spec doesn't get bounced in review.
Its SKILL.md is about 1.3k 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 Playwright. The repository describes itself as: 一个可以给几乎任何视频网站添加弹幕的开源软件 | An open source solution to add danmaku to almost every video website.
When your agent uses it
- Modify a Playwright e2e spec under packages/danmaku-anywhere/e2e/
- Tasks that involve End-to-end testing
Example prompts
- “/e2e-spec”
Workflow steps
7 steps, taken from the first numbered list in SKILL.md.
- Every spec asserts at least one user-visible signal. UI-visible means rendered DOM, toast text + severity, dialog title/body, download…
- The deciding question: if you removed every UI assertion, would the test still pass on data alone? If yes, it isn't e2e; move it to unit…
- Standard shape: seed via dev API → drive the UI → assert UI → optionally assert state.
- Locale-stable matchers. Toast/dialog text is i18n-translated. Use popup.toast.expectSuccess / expectError (scoped by data-severity), not…
- POMs over selectors. Add methods to a POM under e2e/pom/ rather than reaching into selectors from a spec. If a one-off selector is…
- Header JSDoc on every spec: 3–6 lines after imports, before the first test(). Names what's exercised and what's asserted. No design-doc…
- Default to no comments inside the body / POMs. The bar: "removing it would cost an hour of debugging." Restating the next line is not that…
What it can do on your machine
Read from SKILL.md and the folder at commit d2d6d41. 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
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
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 Spec loads about 1.3k tokens when it runs. Until then it costs about 54 tokens; SKILL.md has 738 words of instructions outside code blocks.
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 passed
The automated check found no risky patterns in SKILL.md.
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 738 words (~1,340 tokens).
“The source of truth is packages/danmaku-anywhere/e2e/AGENTS.md. It auto-loads when you're already working in that directory; this skill exists for the path where da-dev step 3 makes you start an e2e change from elsewhere. Read AGENTS.md end-to-end before writing the first…”
- name
- e2e-spec
Files
Just SKILL.md in .claude/skills/e2e-spec of Mr-Quin/danmaku-anywhere.
Open the folder on GitHubat commit d2d6d41
Compare with similar skills
E2E Spec 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| E2E Spec this skillMr-Quin/danmaku-anywhere | 547 | — | ~1.3k | Automated safety check: Pass | Custom licence | |
| Web Application Testinganthropics/skills | 180k | 51 repos | ~966 | Automated safety check: Pass | Apache-2.0 | |
| playwright-cli Browser Automationgithub/gh-aw | 5.4k | 24 repos | ~2.8k | Automated safety check: Pass | MIT | |
| Write and Verify Playwright Testsappsmithorg/appsmith | 41k | — | ~2.9k | Automated safety check: Notes | Apache-2.0 | |
| Cucumber and Playwright E2E Testslanggenius/dify | 158k | — | ~682 | Automated safety check: Pass | Custom licence | |
| E2E Testinglangflow-ai/langflow | 156k | — | ~3.3k | Automated safety check: Pass | MIT |
Similar skills
- Official
- Official
playwright-cli Browser Automation
github/gh-aw
Drives a real browser from the command line with playwright-cli to open pages, interact, mock requests, save state and work with Playwright tests.
Write and Verify Playwright Tests
appsmithorg/appsmith
Writes a Playwright end-to-end test from a prompt, runs it against a live Appsmith deployment and retries with fixes up to three times until it passes.
Cucumber and Playwright E2E Tests
langgenius/dify
Guides changes and reviews of the Cucumber and Playwright end-to-end suite under `e2e/`: feature files, step definitions, support code, tags, locators and assertions.
E2E Testing
langflow-ai/langflow
Write and review Playwright E2E tests for Langflow. An agent skill from langflow-ai/langflow.
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.
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Related
Works with
Categories
Questions about E2E Spec
What does E2E Spec do?
A skill your agent uses when about to write or modify a Playwright e2e spec under packages/danmaku-anywhere/e2e/. E2E Spec is an agent skill from Mr-Quin/danmaku-anywhere. Use when about to write or modify a Playwright e2e spec under packages/danmaku-anywhere/e2e/.
When should I use E2E Spec?
E2E Spec fits situations like: modify a Playwright e2e spec under packages/danmaku-anywhere/e2e/; tasks that involve End-to-end testing.
How do I install E2E Spec in Claude Code?
Run `npx skills add Mr-Quin/danmaku-anywhere --skill e2e-spec -a claude-code`. Or copy the skill folder (.claude/skills/e2e-spec in Mr-Quin/danmaku-anywhere) into .claude/skills/e2e-spec in your project. Claude Code loads it when a task matches its description.
How do I install E2E Spec in Codex?
Run `npx skills add Mr-Quin/danmaku-anywhere --skill e2e-spec -a codex`. Or copy the skill folder (.claude/skills/e2e-spec in Mr-Quin/danmaku-anywhere) into .agents/skills/e2e-spec in your project. Codex loads it when a task matches its description.
Can I use E2E Spec 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 Mr-Quin/danmaku-anywhere --skill e2e-spec -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-spec, .gemini/skills/e2e-spec, .github/skills/e2e-spec and .opencode/skills/e2e-spec in your project.
What does E2E Spec need to run?
SKILL.md names no scripts, command-line tools or credentials: E2E Spec is instructions for the agent only.
Does E2E Spec access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is E2E Spec safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does E2E Spec use?
E2E Spec 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 Spec use?
About 1.3k tokens (SKILL.md is roughly 5.4k 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 Spec?
Skills that share tags, products or a category with E2E Spec: Web Application Testing (anthropics/skills, 180k stars), playwright-cli Browser Automation (github/gh-aw, 5.4k stars), Write and Verify Playwright Tests (appsmithorg/appsmith, 41k stars) and Cucumber and Playwright E2E Tests (langgenius/dify, 158k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains E2E Spec?
Mr-Quin (a GitHub user) maintains it in Mr-Quin/danmaku-anywhere, which has 547 GitHub stars. The repository holds 9 skills in this directory. The repository was last updated on September 7, 2026.
Source: Mr-Quin/danmaku-anywhere on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.