Web Application Testing
anthropics/skills
Tests local web applications with Python Playwright scripts, checking frontend behavior, capturing screenshots and reading browser console logs.
Diagnose and fix tests that pass sometimes and fail other times.
Install Flaky Hunter
$ npx skills add Archive228/loopkit --skill flaky-hunter -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Archive228/loopkit flaky-hunter --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/Archive228/loopkit.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/flaky-hunter .claude/skills/flaky-hunter && 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 "flaky-hunter" agent skill from https://github.com/Archive228/loopkit/tree/main/skills/flaky-hunter into .claude/skills/flaky-hunter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "flaky-hunter", 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/Archive228/loopkit/tree/main/skills/flaky-hunterType 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 Archive228/loopkit --skill flaky-hunter -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Archive228/loopkit flaky-hunter --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Archive228/loopkit.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/flaky-hunter .agents/skills/flaky-hunter && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "flaky-hunter" agent skill from https://github.com/Archive228/loopkit/tree/main/skills/flaky-hunter into .agents/skills/flaky-hunter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "flaky-hunter", 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 Archive228/loopkit --skill flaky-hunter -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Archive228/loopkit flaky-hunter --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Archive228/loopkit.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/flaky-hunter .cursor/skills/flaky-hunter && 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 "flaky-hunter" agent skill from https://github.com/Archive228/loopkit/tree/main/skills/flaky-hunter into .cursor/skills/flaky-hunter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "flaky-hunter", 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/Archive228/loopkit.git --path skills/flaky-hunter--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 Archive228/loopkit --skill flaky-hunter -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Archive228/loopkit flaky-hunter --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Archive228/loopkit.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/flaky-hunter .gemini/skills/flaky-hunter && 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 "flaky-hunter" agent skill from https://github.com/Archive228/loopkit/tree/main/skills/flaky-hunter into .gemini/skills/flaky-hunter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "flaky-hunter", 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 Archive228/loopkit flaky-hunterInstalls 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 Archive228/loopkit --skill flaky-hunter -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Archive228/loopkit.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/flaky-hunter .github/skills/flaky-hunter && 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 "flaky-hunter" agent skill from https://github.com/Archive228/loopkit/tree/main/skills/flaky-hunter into .github/skills/flaky-hunter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "flaky-hunter", 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 Archive228/loopkit --skill flaky-hunter -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Archive228/loopkit flaky-hunter --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Archive228/loopkit.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/flaky-hunter .opencode/skills/flaky-hunter && 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 "flaky-hunter" agent skill from https://github.com/Archive228/loopkit/tree/main/skills/flaky-hunter into .opencode/skills/flaky-hunter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "flaky-hunter", 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
flaky-hunter- GitHub stars
- 756
- Token cost
- ~222 tokens
- SKILL.md length
- 106 words
- Files
- 1
- Skills in repo
- 43
- Repo updated
- First seen
- Licence
- MIT
At a glance
Diagnose and fix tests that pass sometimes and fail other times.
- Works in 4 steps: Time/order — depends on test execution… → Async race — asserting before a… → Real network/clock/random — mock them.… → …
- CI is red intermittently
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Flaky Hunter is an agent skill from Archive228/loopkit. Diagnose and fix tests that pass sometimes and fail other times. Use when CI is red intermittently.
Its SKILL.md is about 220 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. The repository describes itself as: 33 battle-tested skills + minimal .claude harness for any coding agent (Claude Code, Cursor, Codex, Gemini CLI). The licence is MIT.
When your agent uses it
- CI is red intermittently
Example prompts
- “/flaky-hunter”
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Time/order — depends on test execution order or shared mutable state. Isolate it; run alone.
- Async race — asserting before a promise/refetch resolves. Await the actual condition, not a sleep.
- Real network/clock/random — mock them. Freeze time, seed RNG, stub the call.
- Resource leak — a prior test left a connection/file/port open.
What it can do on your machine
Read from SKILL.md and the folder at commit 5ae033e. 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
Flaky Hunter loads about 222 tokens when it runs. Until then it costs about 28 tokens; SKILL.md has 106 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 Archive228/loopkit at commit 5ae033e, republished under its MIT licence (© Archive228). 106 words, ~222 tokens.
Download SKILL.mdSave it as
.claude/skills/flaky-hunter/SKILL.md (or your agent's skills folder).- name
- flaky-hunter
- description
- Diagnose and fix tests that pass sometimes and fail other times. Use when CI is red intermittently.
- when_to_use
- intermittent CI failure, "passes locally fails in CI", a flaky test
Flaky Test Hunter
Run the suspect test 20x in a loop first — confirm it's actually flaky, not just broken. Common causes, in order of likelihood:
- Time/order — depends on test execution order or shared mutable state. Isolate it; run alone.
- Async race — asserting before a promise/refetch resolves. Await the actual condition, not a sleep.
- Real network/clock/random — mock them. Freeze time, seed RNG, stub the call.
- Resource leak — a prior test left a connection/file/port open.
Fix the cause, not the symptom.
retry(3)on a flaky test hides a real race that will bite in production. Quarantine only as a last resort, with a ticket.
© Archive228, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/flaky-hunter of Archive228/loopkit.
Open the folder on GitHubat commit 5ae033e
Compare with similar skills
Flaky Hunter 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 |
|---|---|---|---|---|---|---|
| Flaky Hunter this skillArchive228/loopkit | 756 | — | ~222 | Automated safety check: Pass | MIT | |
| Web Application Testinganthropics/skills | 180k | 51 repos | ~966 | Automated safety check: Pass | Apache-2.0 | |
| Diagnosing Bugsfossasia/eventyay-interpretation | 1.6k | 32 repos | ~2.1k | Automated safety check: Pass | Apache-2.0 | |
| TDDpietheinstrengholt/rssmonster | 564 | 30 repos | ~906 | Automated safety check: Pass | MIT | |
| TDD WorkflowhellangleZ/burn-in-cceverywhere-ralph | 112 | 11 repos | ~2.4k | Automated safety check: Pass | None | |
| TDDsanity-io/sanity | 6.4k | 20 repos | ~1k | Automated safety check: Pass | MIT |
Similar skills
- Official
Diagnosing Bugs
fossasia/eventyay-interpretation
Diagnosis loop for hard bugs and performance regressions. An agent skill from fossasia/eventyay-interpretation.
TDD
pietheinstrengholt/rssmonster
Test-driven development. An agent skill from pietheinstrengholt/rssmonster.
TDD Workflow
hellangleZ/burn-in-cceverywhere-ralph
A skill your agent uses when writing new features, fixing bugs, or refactoring code.
- Official
TDD
sanity-io/sanity
Test-driven development with red-green-refactor loop. An agent skill from sanity-io/sanity.
Context Driven Development
Ibrahim-3d/orchestrator-supaconductor
A skill your agent uses when working with Conductor's context-driven development methodology, managing project context artifacts, or understanding the relationship between product.md, tech-stack.md…
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Structured Output
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Using Loopkit
Archive228/loopkit
A skill your agent uses when starting any conversation in a loopkit-enabled project - establishes how to find and use loopkit's 49 skills, requiring skill invocation before ANY response including…
Active Memory Reminder
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Eval Harness
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Build a repeatable eval loop that grades agent output with an LLM judge, so prompt/skill changes get scored against a baseline instead of eyeballed.
Feature List JSON
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Enumerate every end-to-end feature as strict JSON entries with passes:false, editable-passes-only discipline, and priority order.
Related
Categories
Questions about Flaky Hunter
What does Flaky Hunter do?
Diagnose and fix tests that pass sometimes and fail other times. Flaky Hunter is an agent skill from Archive228/loopkit. Diagnose and fix tests that pass sometimes and fail other times.
When should I use Flaky Hunter?
Flaky Hunter fits situations like: CI is red intermittently.
How do I install Flaky Hunter in Claude Code?
Run `npx skills add Archive228/loopkit --skill flaky-hunter -a claude-code`. Or copy the skill folder (skills/flaky-hunter in Archive228/loopkit) into .claude/skills/flaky-hunter in your project. Claude Code loads it when a task matches its description.
How do I install Flaky Hunter in Codex?
Run `npx skills add Archive228/loopkit --skill flaky-hunter -a codex`. Or copy the skill folder (skills/flaky-hunter in Archive228/loopkit) into .agents/skills/flaky-hunter in your project. Codex loads it when a task matches its description.
Can I use Flaky Hunter 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 Archive228/loopkit --skill flaky-hunter -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/flaky-hunter, .gemini/skills/flaky-hunter, .github/skills/flaky-hunter and .opencode/skills/flaky-hunter in your project.
What does Flaky Hunter need to run?
SKILL.md names no scripts, command-line tools or credentials: Flaky Hunter is instructions for the agent only.
Does Flaky Hunter 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 Flaky Hunter 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 Flaky Hunter use?
Flaky Hunter 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 Flaky Hunter use?
About 222 tokens (SKILL.md is roughly 888 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 Flaky Hunter?
Skills that share tags, products or a category with Flaky Hunter: Web Application Testing (anthropics/skills, 180k stars), Diagnosing Bugs (fossasia/eventyay-interpretation, 1.6k stars), TDD (pietheinstrengholt/rssmonster, 564 stars) and TDD Workflow (hellangleZ/burn-in-cceverywhere-ralph, 112 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Flaky Hunter?
Archive228 (a GitHub user) maintains it in Archive228/loopkit, which has 756 GitHub stars. The repository holds 43 skills in this directory. The repository was last updated on July 14, 2026.
Source: Archive228/loopkit on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.