E2E Testing
ericrisco/rsc-harness
A skill your agent uses when writing or stabilizing Playwright tests that drive a real browser through multi-step journeys — durable locators, web-first assertions, storageState auth, trace/retries…
Agent skill
Quality Engineering Selector Stability
Cross-stack selector and test-id policy for web and mobile automation.
Install Quality Engineering Selector Stability
$ npx skills add HoangNguyen0403/agent-skills-standard --skill quality-engineering-selector-stability -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard quality-engineering-selector-stability --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/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/quality-engineering/quality-engineering-selector-stability .claude/skills/quality-engineering-selector-stability && 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 "quality-engineering-selector-stability" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/quality-engineering/quality-engineering-selector-stability into .claude/skills/quality-engineering-selector-stability/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "quality-engineering-selector-stability", 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/HoangNguyen0403/agent-skills-standard/tree/develop/skills/quality-engineering/quality-engineering-selector-stabilityType 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 HoangNguyen0403/agent-skills-standard --skill quality-engineering-selector-stability -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard quality-engineering-selector-stability --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/quality-engineering/quality-engineering-selector-stability .agents/skills/quality-engineering-selector-stability && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "quality-engineering-selector-stability" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/quality-engineering/quality-engineering-selector-stability into .agents/skills/quality-engineering-selector-stability/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "quality-engineering-selector-stability", 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 HoangNguyen0403/agent-skills-standard --skill quality-engineering-selector-stability -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard quality-engineering-selector-stability --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/quality-engineering/quality-engineering-selector-stability .cursor/skills/quality-engineering-selector-stability && 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 "quality-engineering-selector-stability" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/quality-engineering/quality-engineering-selector-stability into .cursor/skills/quality-engineering-selector-stability/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "quality-engineering-selector-stability", 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/HoangNguyen0403/agent-skills-standard.git --path skills/quality-engineering/quality-engineering-selector-stability--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 HoangNguyen0403/agent-skills-standard --skill quality-engineering-selector-stability -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard quality-engineering-selector-stability --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/quality-engineering/quality-engineering-selector-stability .gemini/skills/quality-engineering-selector-stability && 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 "quality-engineering-selector-stability" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/quality-engineering/quality-engineering-selector-stability into .gemini/skills/quality-engineering-selector-stability/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "quality-engineering-selector-stability", 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 HoangNguyen0403/agent-skills-standard quality-engineering-selector-stabilityInstalls 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 HoangNguyen0403/agent-skills-standard --skill quality-engineering-selector-stability -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/quality-engineering/quality-engineering-selector-stability .github/skills/quality-engineering-selector-stability && 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 "quality-engineering-selector-stability" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/quality-engineering/quality-engineering-selector-stability into .github/skills/quality-engineering-selector-stability/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "quality-engineering-selector-stability", 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 HoangNguyen0403/agent-skills-standard --skill quality-engineering-selector-stability -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard quality-engineering-selector-stability --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/quality-engineering/quality-engineering-selector-stability .opencode/skills/quality-engineering-selector-stability && 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 "quality-engineering-selector-stability" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/quality-engineering/quality-engineering-selector-stability into .opencode/skills/quality-engineering-selector-stability/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "quality-engineering-selector-stability", 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
quality-engineering-selector-stability- GitHub stars
- 572
- Token cost
- ~517 tokens
- SKILL.md length
- 154 words
- Files
- 6 (incl. references)
- Skills in repo
- 211
- Repo updated
- First seen
- Licence
- MIT
At a glance
Cross-stack selector and test-id policy for web and mobile automation.
- Reviewing E2E/UI test locators
- SKILL.md covers Priority: P0 (CRITICAL), Web Ladder, Mobile Ladder and Framework Map, plus 5 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Adding data-testid/accessibility identifiers to components
What it does
Quality Engineering Selector Stability is an agent skill from HoangNguyen0403/agent-skills-standard. Cross-stack selector and test-id policy for web and mobile automation. Use when writing or reviewing E2E/UI test locators, or adding data-testid/accessibility identifiers to components.
Its SKILL.md is about 520 tokens, which your agent loads only when the skill is triggered. The skill folder holds 7 other files, including reference files (for example `evals/evals.json`, `references/drift-classification.md` and `references/insertion-policy.md`).
It sits in Frontend & Design, covering End-to-end testing and Accessibility. The repository describes itself as: A collection of Agent Skills Standard and Best Practice for Programming Languages, Frameworks that help our AI Agent follow best practies on frameworks and programming laguages. The licence is MIT.
When your agent uses it
- Reviewing E2E/UI test locators
- Adding data-testid/accessibility identifiers to components
Example prompts
- “/quality-engineering-selector-stability”
What it can do on your machine
Read from SKILL.md and the folder at commit b529c2d. 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
Quality Engineering Selector Stability loads about 517 tokens when it runs, and up to ~1.2k if it reads all its reference files. Until then it costs about 56 tokens; SKILL.md has 154 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
The full file from HoangNguyen0403/agent-skills-standard at commit b529c2d, republished under its MIT licence (© HoangNguyen0403). 154 words, ~517 tokens.
Download SKILL.mdSave it as
.claude/skills/quality-engineering-selector-stability/SKILL.md (or your agent's skills folder). This skill also uses 5 other files; get the full folder from GitHub.- name
- quality-engineering-selector-stability
- description
- Cross-stack selector and test-id policy for web and mobile automation. Use when writing or reviewing E2E/UI test locators, or adding data-testid/accessibility identifiers to components.
Quality Engineering: Selector Stability
Priority: P0 (CRITICAL)
Web Ladder
getByRole / getByLabel > getByTestId (data-testid) > attribute CSS. Never XPath, nth-child, or generated class names.
Mobile Ladder
Accessibility id > resource-id / testTag > predicate/uiautomator > XPath. Never XPath.
Framework Map
- React/Next.js:
data-testid. React Native:testID+accessibilityLabel. - Flutter:
Semantics(identifier:)for black-box E2E;WidgetKeysstay for widget tests. - SwiftUI/UIKit:
.accessibilityIdentifier. Compose:Modifier.testTag+testTagsAsResourceId = true.
Naming
<screen>-<element>-<role>, kebab-case (e.g. checkout-submit-button).
Insertion Policy
Add ids to leaf interactive/assertable elements only, never layout wrappers. Never rename an existing id — ids are a public contract other tests depend on.
Drift Classes
rename (id changed), restructure (DOM/tree moved), i18n (visible text changed, id untouched).
Anti-Patterns
- Text selectors on translated strings, index-based locators (
nth), generated/hashed class names. - Using
accessibilityLabelas a test id (it is user-facing a11y text, not a stable identifier). - "xpath just for now" — there is no temporary XPath; use the ladder from the first commit.
References
© HoangNguyen0403, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 5 other files (references) in skills/quality-engineering/quality-engineering-selector-stability of HoangNguyen0403/agent-skills-standard.
- SKILL.md
- evals/evals.json
- references/drift-classification.md
- references/insertion-policy.md
- references/selector-ladder.md
- references/testid-naming.md
Open the folder on GitHubat commit b529c2d
Compare with similar skills
Quality Engineering Selector Stability 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 |
|---|---|---|---|---|---|---|
| Quality Engineering Selector Stability this skillHoangNguyen0403/agent-skills-standard | 572 | — | ~517 | Automated safety check: Pass | MIT | |
| E2E Testingericrisco/rsc-harness | 180 | — | ~3.2k | Automated safety check: Pass | MIT | |
| Asc Shots PipelineCamilleScholtz/swmpc | 239 | 4 repos | ~2.8k | Automated safety check: Pass | EUPL-1.2 | |
| AccessibilityGetStream/stream-chat-react-native | 1.2k | — | ~6.5k | Automated safety check: Pass | Custom licence | |
| WCAG 2.2 Accessibility AuditAIPexStudio/AIPex | 1.3k | — | ~4.7k | Automated safety check: Pass | MIT | |
| Control UIcursor/plugins | 11k | 2 repos | ~1.2k | Automated safety check: Pass | None |
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GetStream/stream-chat-react-native
Maintain VoiceOver/TalkBack-focused accessibility in stream-chat-react-native.
WCAG 2.2 Accessibility Audit
AIPexStudio/AIPex
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- Official
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cursor/plugins
Build or adapt a local browser/CDP harness to drive and inspect a web, IDE, or Electron UI.
Vrt
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DST — Trigger the Visual-Regression-Tests (Chromatic) GitHub Actions workflow on the current or a given branch.
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Categories
Questions about Quality Engineering Selector Stability
What does Quality Engineering Selector Stability do?
Cross-stack selector and test-id policy for web and mobile automation. Quality Engineering Selector Stability is an agent skill from HoangNguyen0403/agent-skills-standard. Cross-stack selector and test-id policy for web and mobile automation.
When should I use Quality Engineering Selector Stability?
Quality Engineering Selector Stability fits situations like: reviewing E2E/UI test locators; adding data-testid/accessibility identifiers to components.
How do I install Quality Engineering Selector Stability in Claude Code?
Run `npx skills add HoangNguyen0403/agent-skills-standard --skill quality-engineering-selector-stability -a claude-code`. Or copy the skill folder (skills/quality-engineering/quality-engineering-selector-stability in HoangNguyen0403/agent-skills-standard) into .claude/skills/quality-engineering-selector-stability in your project. Claude Code loads it when a task matches its description.
How do I install Quality Engineering Selector Stability in Codex?
Run `npx skills add HoangNguyen0403/agent-skills-standard --skill quality-engineering-selector-stability -a codex`. Or copy the skill folder (skills/quality-engineering/quality-engineering-selector-stability in HoangNguyen0403/agent-skills-standard) into .agents/skills/quality-engineering-selector-stability in your project. Codex loads it when a task matches its description.
Can I use Quality Engineering Selector Stability 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 HoangNguyen0403/agent-skills-standard --skill quality-engineering-selector-stability -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/quality-engineering-selector-stability, .gemini/skills/quality-engineering-selector-stability, .github/skills/quality-engineering-selector-stability and .opencode/skills/quality-engineering-selector-stability in your project.
What does Quality Engineering Selector Stability need to run?
SKILL.md names no scripts, command-line tools or credentials: Quality Engineering Selector Stability is instructions for the agent only.
Does Quality Engineering Selector Stability 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 Quality Engineering Selector Stability 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 Quality Engineering Selector Stability use?
Quality Engineering Selector Stability is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Quality Engineering Selector Stability use?
About 517 tokens (SKILL.md is roughly 2.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 704 tokens, read only when the agent opens those files.
What are the alternatives to Quality Engineering Selector Stability?
Skills that share tags, products or a category with Quality Engineering Selector Stability: E2E Testing (ericrisco/rsc-harness, 180 stars), Asc Shots Pipeline (CamilleScholtz/swmpc, 239 stars), Accessibility (GetStream/stream-chat-react-native, 1.2k stars) and WCAG 2.2 Accessibility Audit (AIPexStudio/AIPex, 1.3k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Quality Engineering Selector Stability?
HoangNguyen0403 (a GitHub user) maintains it in HoangNguyen0403/agent-skills-standard, which has 572 GitHub stars. The repository holds 211 skills in this directory. The repository was last updated on October 9, 2026.
Source: HoangNguyen0403/agent-skills-standard on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.