Preview Rostra
dpc/rostra
Use agent-browser to interact with Rostra's live development UI through accessibility snapshots, semantic controls, text entry, and screenshots.
Run a real-world navigation and capability gauntlet on Browser Control across live websites, fix general DOM/ARIA/CDP root causes, benchmark speed and token efficiency, and finish with a mandatory…
Install Gauntlet
$ npx skills add anomalyco/browser-control --skill gauntlet -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install anomalyco/browser-control gauntlet --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/anomalyco/browser-control.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.opencode/skills/gauntlet .claude/skills/gauntlet && 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 "gauntlet" agent skill from https://github.com/anomalyco/browser-control/tree/main/.opencode/skills/gauntlet into .claude/skills/gauntlet/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gauntlet", 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/anomalyco/browser-control/tree/main/.opencode/skills/gauntletType 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 anomalyco/browser-control --skill gauntlet -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install anomalyco/browser-control gauntlet --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/anomalyco/browser-control.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.opencode/skills/gauntlet .agents/skills/gauntlet && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "gauntlet" agent skill from https://github.com/anomalyco/browser-control/tree/main/.opencode/skills/gauntlet into .agents/skills/gauntlet/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gauntlet", 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 anomalyco/browser-control --skill gauntlet -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install anomalyco/browser-control gauntlet --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/anomalyco/browser-control.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.opencode/skills/gauntlet .cursor/skills/gauntlet && 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 "gauntlet" agent skill from https://github.com/anomalyco/browser-control/tree/main/.opencode/skills/gauntlet into .cursor/skills/gauntlet/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gauntlet", 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/anomalyco/browser-control.git --path .opencode/skills/gauntlet--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 anomalyco/browser-control --skill gauntlet -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install anomalyco/browser-control gauntlet --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/anomalyco/browser-control.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.opencode/skills/gauntlet .gemini/skills/gauntlet && 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 "gauntlet" agent skill from https://github.com/anomalyco/browser-control/tree/main/.opencode/skills/gauntlet into .gemini/skills/gauntlet/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gauntlet", 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 anomalyco/browser-control gauntletInstalls 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 anomalyco/browser-control --skill gauntlet -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/anomalyco/browser-control.git skills-src && mkdir -p .github/skills && cp -r skills-src/.opencode/skills/gauntlet .github/skills/gauntlet && 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 "gauntlet" agent skill from https://github.com/anomalyco/browser-control/tree/main/.opencode/skills/gauntlet into .github/skills/gauntlet/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gauntlet", 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 anomalyco/browser-control --skill gauntlet -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install anomalyco/browser-control gauntlet --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/anomalyco/browser-control.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.opencode/skills/gauntlet .opencode/skills/gauntlet && 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 "gauntlet" agent skill from https://github.com/anomalyco/browser-control/tree/main/.opencode/skills/gauntlet into .opencode/skills/gauntlet/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gauntlet", 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
gauntlet- GitHub stars
- 438
- Token cost
- ~1.1k tokens
- SKILL.md length
- 399 words
- Files
- 1
- Skills in repo
- 3
- Repo updated
- First seen
- Licence
- MIT
At a glance
Run a real-world navigation and capability gauntlet on Browser Control across live websites, fix general DOM/ARIA/CDP root causes, benchmark speed and token efficiency, and finish with a mandatory…
- Works in 4 steps: Gauntlet — Adversarial Real-Site Field… → Autoresearch — Speed, Token & Round-Trip… → Simplify — Mandatory Coherence &… → …
- Asked to run a gauntlet
- Calls pnpm; reaches ui.shadcn.com and github.com
- Dogfood Browser Control on real sites
What it does
Gauntlet is an agent skill from anomalyco/browser-control. Run a real-world navigation and capability gauntlet on Browser Control across live websites, fix general DOM/ARIA/CDP root causes, benchmark speed and token efficiency, and finish with a mandatory simplify pass. Use when asked to run a gauntlet, dogfood Browser Control on real sites, or do an improvement pass.
Its SKILL.md is about 1.1k 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 Productivity & Automation, covering Browser automation, Root cause analysis and Accessibility. The repository describes itself as: Local browser driver for trusted agents: control your existing Chromium browser through a small extension and local relay. The licence is MIT.
When your agent uses it
- Asked to run a gauntlet
- Dogfood Browser Control on real sites
- Do an improvement pass
Example prompts
- “/gauntlet”
Workflow steps
4 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit 22c0f77. 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:
pnpm
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
ui.shadcn.comgithub.comresy.comubereats.comnews.ycombinator.comen.wikipedia.orgnpmjs.comdeveloper.mozilla.orgreddit.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
Gauntlet loads about 1.1k tokens when it runs. Until then it costs about 80 tokens; SKILL.md has 399 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 anomalyco/browser-control at commit 22c0f77, republished under its MIT licence (© anomalyco). 399 words, ~1,149 tokens.
Download SKILL.mdSave it as
.claude/skills/gauntlet/SKILL.md (or your agent's skills folder).- name
- gauntlet
- description
- Run a real-world navigation and capability gauntlet on Browser Control across live websites, fix general DOM/ARIA/CDP root causes, benchmark speed and token efficiency, and finish with a mandatory simplify pass. Use when asked to run a gauntlet, dogfood Browser Control on real sites, or do an improvement pass.
Gauntlet
Run Browser Control against uncurated live websites, fix general root causes as you hit them, lock each fix in with a minimal offline regression test, and always finish with a Simplify pass so new capabilities never accumulate site-specific hacks or bloated files.
┌─────────────────────────────────────────────────────────────────────┐
│ │
▼ │
[1. Gauntlet] ──► [2. Autoresearch] ──► [3. Simplify] ──► [4. Harvest] ─┘
Real-site Latency, token & Compress code, Promote recurring
field tasks round-trip profile remove hacks UI flows to CLIsWorkflow
1. Gauntlet — Adversarial Real-Site Field Pass
- Create a dedicated session (
browser-control session new "🧭 gauntlet") and pick 4–6 diverse live sites that stress different web patterns (never perform destructive/irreversible actions like placing an order):- Portal UI libraries:
https://ui.shadcn.com/docs/components/radix/select(Radix<button role="combobox">, body-portaled[role="listbox"]/[role="option"]) - Complex web apps:
https://github.com/Effect-TS/effect/issues(Primer[role="menu"]/[role="menuitemradio"], filter dialogs,snapshot({ delta: true })) - Dense SPAs & e-commerce / booking:
https://resy.com,https://www.ubereats.com(top-level<header>search bars, carousels, focus-locked modals, deep card lists) - Layout tables & prose:
https://news.ycombinator.com,https://en.wikipedia.org,https://www.npmjs.com - Web Components & Shadow DOM:
https://developer.mozilla.org/en-US/docs/Web/API/ShadowRoot,https://www.reddit.com/r/typescript/
- Portal UI libraries:
- Drive each task through the public agent interface (
snapshot(),ref("eN"),screenshotWithLabels(),network). - Whenever a step fails, times out, misses an interactive control, emits
duplicate lines, or forces a blind
waitForTimeoutsleep:- Inspect the live DOM in the session to find the general DOM, W3C ARIA, or CDP root cause.
- Never hardcode site-specific domain names or CSS class names. Express every rule in terms of standard HTML tags, ARIA roles/attributes, computed styles, or DOM structure.
- Fix the root cause in
src/(orextension/src/), add a minimal offline HTML regression check toscripts/check-snapshot.tsortest/, deploy to/Users/kit/.browser-control/current-runtime(pnpm runtime:prepare+pnpm runtime:select+browser-control relay restart), and re-verify on the live site.
Show full SKILL.md (173 more words)Show less
2. Autoresearch — Speed, Token & Round-Trip Check
Measure across the gauntlet sites:
- Wall-clock latency (
ms) persnapshot()call (target:15–40 mson standard pages,< 180 mson 9,000-node Shadow DOM pages). - Token footprint (
chars/lines): eliminate duplicateheading+linkpairs, redundantlistitem/pwrappers, and layout-table noise. - Avoidable round-trips & sleeps: prefer event-driven settle (
MutationObserver,Emulation.setFocusEmulationEnabled) over manualwaitForTimeoutpadding.
3. Simplify — Mandatory Coherence & Compression Pass
After fixing gauntlet findings, always run a simplify pass before finishing:
- Remove any ad-hoc branches, dead flags, or overlapping helpers introduced during debugging.
- Keep module boundaries clean (
src/snapshot.tsowns DOM inspection and input helpers;src/execute.tsownsExecuteSandboxand page recovery). - Run the full verification gate:
bash pnpm exec tsx scripts/check-snapshot.ts pnpm check:locals && pnpm check:unused && pnpm audit:duplicates pnpm test
4. Harvest — UI-to-API Promotion (Optional)
When testing a multi-step workflow (like Uber Eats or Resy), verify that
network.start() + network.stop() produces a clean .endpoints digest and
that BrowserControlClient.origin(url, { session, headers, handoffOnAuthFailure: true })
can drive the JSON API directly in one turn.
Always delete temporary gauntlet sessions (browser-control session delete "🧭 gauntlet")
when finished.
© anomalyco, 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 .opencode/skills/gauntlet of anomalyco/browser-control.
Open the folder on GitHubat commit 22c0f77
Compare with similar skills
Gauntlet 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 |
|---|---|---|---|---|---|---|
| Gauntlet this skillanomalyco/browser-control | 438 | — | ~1.1k | Automated safety check: Pass | MIT | |
| Preview Rostradpc/rostra | 110 | — | ~2.3k | Automated safety check: Pass | None | |
| Kuri Serverjustrach/kuri | 365 | — | ~6.2k | Automated safety check: Notes | Custom licence | |
| CLI Anything BrowserHKUDS/CLI-Anything | 52k | — | ~1.5k | Automated safety check: Warn | Apache-2.0 | |
| Bdgszymdzum/browser-debugger-cli | 152 | — | ~2.5k | Automated safety check: Pass | MIT | |
| Vitemagnus919/agent-skills | 111 | — | ~1.5k | Automated safety check: Notes | MIT |
Similar skills
Kuri Server
justrach/kuri
Use kuri-server to automate Chrome via HTTP API — navigate pages, get a11y snapshots, interact with elements, capture network traffic (HAR), extract cookies, and bypass bot protection.
CLI Anything Browser
HKUDS/CLI-Anything
Browser automation CLI using DOMShell MCP server. An agent skill from HKUDS/CLI-Anything.
Bdg
szymdzum/browser-debugger-cli
Use bdg CLI to drive and debug a real Chrome via Chrome DevTools Protocol - navigate, click, fill and submit forms, check what an action changed (navigation, new messages, pending requests), inspect…
Vite
magnus919/agent-skills
Operate Vite projects: inspect versions and configuration, run bounded development and production builds, diagnose dependency and asset failures, and configure environment-aware frontend delivery.
Browser QA
affaan-m/ECC
Run automated post-deploy UI verification with a browser automation MCP (claude-in-chrome, Playwright, or Puppeteer): console-error and Core Web Vitals smoke checks, form and auth-flow interaction…
More from anomalyco/browser-control
Browser Control
anomalyco/browser-control
Drive the user's existing Chromium-family browser with deterministic Playwright.
Self Iteration
anomalyco/browser-control
Dogfood a project-owned tool in a realistic user flow and evaluate the agent experience.
Related
Questions about Gauntlet
What does Gauntlet do?
Run a real-world navigation and capability gauntlet on Browser Control across live websites, fix general DOM/ARIA/CDP root causes, benchmark speed and token efficiency, and finish with a mandatory…. Gauntlet is an agent skill from anomalyco/browser-control. Run a real-world navigation and capability gauntlet on Browser Control across live websites, fix general DOM/ARIA/CDP root causes, benchmark speed and token efficiency, and finish with a mandatory simplify pass.
When should I use Gauntlet?
Gauntlet fits situations like: asked to run a gauntlet; dogfood Browser Control on real sites; do an improvement pass.
How do I install Gauntlet in Claude Code?
Run `npx skills add anomalyco/browser-control --skill gauntlet -a claude-code`. Or copy the skill folder (.opencode/skills/gauntlet in anomalyco/browser-control) into .claude/skills/gauntlet in your project. Claude Code loads it when a task matches its description.
How do I install Gauntlet in Codex?
Run `npx skills add anomalyco/browser-control --skill gauntlet -a codex`. Or copy the skill folder (.opencode/skills/gauntlet in anomalyco/browser-control) into .agents/skills/gauntlet in your project. Codex loads it when a task matches its description.
Can I use Gauntlet 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 anomalyco/browser-control --skill gauntlet -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/gauntlet, .gemini/skills/gauntlet, .github/skills/gauntlet and .opencode/skills/gauntlet in your project.
What does Gauntlet need to run?
Going by SKILL.md and its folder, Gauntlet needs the command-line tools its instructions call (pnpm).
Does Gauntlet access the network?
SKILL.md names 9 domains. In commands or code: ui.shadcn.com, github.com, resy.com, ubereats.com, news.ycombinator.com, en.wikipedia.org, npmjs.com, developer.mozilla.org and reddit.com; the agent is likely to contact these when it follows the instructions. This is read from the text; nothing was executed.
Is Gauntlet 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 Gauntlet use?
Gauntlet 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 Gauntlet use?
About 1.1k tokens (SKILL.md is roughly 4.6k 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 Gauntlet?
Skills that share tags, products or a category with Gauntlet: Preview Rostra (dpc/rostra, 110 stars), Kuri Server (justrach/kuri, 365 stars), CLI Anything Browser (HKUDS/CLI-Anything, 52k stars) and Bdg (szymdzum/browser-debugger-cli, 152 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Gauntlet?
anomalyco (a GitHub organization) maintains it in anomalyco/browser-control, which has 438 GitHub stars. The repository holds 3 skills in this directory. The repository was last updated on October 7, 2026.
Source: anomalyco/browser-control on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.