Browser Testing with Chrome DevTools
addyosmani/agent-skills
Connects an agent to a real Chrome instance through the Chrome DevTools MCP server, so it can inspect the DOM, read console errors and profile performance directly.
Resolve a natural-language element description ("the red button in the hero", "the third card from the top") to a concrete DOM element in the current preview + source-code location.
Install Inspect
$ npx skills add bluzir/claude-code-design --skill inspect -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install bluzir/claude-code-design inspect --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/bluzir/claude-code-design.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/inspect .claude/skills/inspect && 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 "inspect" agent skill from https://github.com/bluzir/claude-code-design/tree/main/.claude/skills/inspect into .claude/skills/inspect/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "inspect", 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/bluzir/claude-code-design/tree/main/.claude/skills/inspectType 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 bluzir/claude-code-design --skill inspect -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install bluzir/claude-code-design inspect --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/bluzir/claude-code-design.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/inspect .agents/skills/inspect && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "inspect" agent skill from https://github.com/bluzir/claude-code-design/tree/main/.claude/skills/inspect into .agents/skills/inspect/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "inspect", 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 bluzir/claude-code-design --skill inspect -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install bluzir/claude-code-design inspect --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/bluzir/claude-code-design.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/inspect .cursor/skills/inspect && 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 "inspect" agent skill from https://github.com/bluzir/claude-code-design/tree/main/.claude/skills/inspect into .cursor/skills/inspect/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "inspect", 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/bluzir/claude-code-design.git --path .claude/skills/inspect--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 bluzir/claude-code-design --skill inspect -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install bluzir/claude-code-design inspect --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/bluzir/claude-code-design.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/inspect .gemini/skills/inspect && 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 "inspect" agent skill from https://github.com/bluzir/claude-code-design/tree/main/.claude/skills/inspect into .gemini/skills/inspect/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "inspect", 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 bluzir/claude-code-design inspectInstalls 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 bluzir/claude-code-design --skill inspect -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/bluzir/claude-code-design.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/inspect .github/skills/inspect && 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 "inspect" agent skill from https://github.com/bluzir/claude-code-design/tree/main/.claude/skills/inspect into .github/skills/inspect/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "inspect", 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 bluzir/claude-code-design --skill inspect -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install bluzir/claude-code-design inspect --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/bluzir/claude-code-design.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/inspect .opencode/skills/inspect && 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 "inspect" agent skill from https://github.com/bluzir/claude-code-design/tree/main/.claude/skills/inspect into .opencode/skills/inspect/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "inspect", 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
inspect- GitHub stars
- 106
- Token cost
- ~1.1k tokens
- SKILL.md length
- 411 words
- Files
- 1
- Skills in repo
- 18
- Repo updated
- First seen
- Licence
- None found
At a glance
Resolve a natural-language element description ("the red button in the hero", "the third card from the top") to a concrete DOM element in the current preview + source-code location.
- Works in 6 steps: Get snapshot → Match the description against snapshot… → Pick the best UID. If multiple… → …
- User asks to change/style/remove a specific visual element without pointing at source code
- SKILL.md covers Prerequisites, Pipeline, Heuristic priorities for "the… and When to fall back to asking, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Inspect is an agent skill from bluzir/claude-code-design. Resolve a natural-language element description ("the red button in the hero", "the third card from the top") to a concrete DOM element in the current preview + source-code location. Uses Chrome DevTools MCP takesnapshot UIDs for deterministic targeting. Use when user asks to change/style/remove a specific visual element without pointing at source code.
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 Testing & QA, covering Browser testing. It works with Model Context Protocol and Chrome DevTools. The repository describes itself as: Claude Design reproduced for Claude Code — HTML decks, prototypes, design systems, animated videos via skills + starters + Chrome DevTools MCP.
When your agent uses it
- User asks to change/style/remove a specific visual element without pointing at source code
- Tasks that involve Browser testing
Example prompts
- “the red button in the hero”
- “the third card from the top”
- “/inspect”
Requirements
- Pre-approved tools (allowed-tools): Read, Grep, Glob, mcp__chrome-devtools__take_snapshot, mcp__chrome-devtools__evaluate_script, mcp__chrome-devtools__take_screenshot
Workflow steps
6 steps, taken from the first numbered list in SKILL.md.
- Get snapshot
- Match the description against snapshot nodes. Use vision + text heuristics
- Pick the best UID. If multiple candidates, show the top 3 to the user with a one-line summary each
- Resolve to source location. Once UID is confirmed
- Report
- Optional next step: if user requested an edit alongside inspection ("make it bigger") — perform the Edit directly with the located line…
What it can do on your machine
Read from SKILL.md and the folder at commit ce68c84. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
ReadGrepGlobmcp__chrome-devtools__take_snapshotmcp__chrome-devtools__evaluate_scriptmcp__chrome-devtools__take_screenshot
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
Inspect loads about 1.1k tokens when it runs. Until then it costs about 91 tokens; SKILL.md has 411 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
Without a licence we can't republish the file, so here is its outline and opening line. It has 411 words (~1,070 tokens).
“Replaces Claude Design's inline-comment protocol with a terminal-native alternative: user describes an element in English, Claude resolves to a specific DOM node + source location for surgical edits.”
- name
- inspect
- allowed-tools
- Read, Grep, Glob, mcp__chrome-devtools__take_snapshot, mcp__chrome-devtools__evaluate_script, mcp__chrome-devtools__take_screenshot
- argument-hint
- <natural-language description>
Files
Just SKILL.md in .claude/skills/inspect of bluzir/claude-code-design.
Open the folder on GitHubat commit ce68c84
Compare with similar skills
Inspect 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 |
|---|---|---|---|---|---|---|
| Inspect this skillbluzir/claude-code-design | 106 | — | ~1.1k | Automated safety check: Pass | None | |
| Browser Testing with Chrome DevToolsaddyosmani/agent-skills | 103k | 4 repos | ~3.5k | Automated safety check: Warn | MIT | |
| Diff-Driven Smoke TestsSkyvern-AI/skyvern | 23k | — | ~5.2k | Automated safety check: Pass | AGPL-3.0 | |
| System Bridge Testing Workflowtimmo001/system-bridge | 356 | — | ~843 | Automated safety check: Pass | Apache-2.0 | |
| Mirroir Onboardjfarcand/mirroir-mcp | 245 | — | ~4.4k | Automated safety check: Notes | Apache-2.0 | |
| Capture Bannersnguyenyou/scalex | 109 | — | ~586 | Automated safety check: Pass | MIT |
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Reads your git diff, writes a handful of happy-path browser smoke tests, runs them with Skyvern or Chrome DevTools MCP and posts screenshot evidence to the PR.
System Bridge Testing Workflow
timmo001/system-bridge
How to test System Bridge - Go table-driven tests and commands, web-client quality checks (lint/typecheck/format, no unit tests), the Chrome DevTools MCP interactive test loop for UI and WebSocket…
Mirroir Onboard
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Onboard a consumer web app to mirroir's .mirroir/ dotfile by EXPLORING the running app (chrome-devtools-mcp) — derive real selectors from the accessibility tree, exercise each surface's primary…
Capture Banners
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Re-render Scalex banner and OG image PNGs from their HTML source files using Chrome DevTools MCP.
Octocode Chrome Devtools
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A skill your agent uses when a live page needs Chrome DevTools/CDP evidence: network failures, console errors, performance, DOM/CSS actionability, screenshots/PDF, cookies/storage…
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Apply buffered tweaks from pending.yaml to the source HTML file.
Copy Example
bluzir/claude-code-design
Generate a working demo artifact on dummy content so the user can see a reference implementation.
Create Design System
bluzir/claude-code-design
Extract or build a design system (tokens, components, style guide).
Ingest GitHub
bluzir/claude-code-design
Clone a GitHub repo and extract design tokens (colors, fonts, spacing) from its codebase.
Ingest Screenshot
bluzir/claude-code-design
Analyze an uploaded image (screenshot of a design, website, app) and extract design tokens to use as a starting point.
Make Deck
bluzir/claude-code-design
Build an HTML slide deck (1920×1080, keyboard nav, exportable) when user asks for a presentation, pitch deck, slides, or keynote.
Related
Works with
Categories
Questions about Inspect
What does Inspect do?
Resolve a natural-language element description ("the red button in the hero", "the third card from the top") to a concrete DOM element in the current preview + source-code location. Inspect is an agent skill from bluzir/claude-code-design. Resolve a natural-language element description ("the red button in the hero", "the third card from the top") to a concrete DOM element in the current preview + source-code location.
When should I use Inspect?
Inspect fits situations like: user asks to change/style/remove a specific visual element without pointing at source code; tasks that involve Browser testing.
How do I install Inspect in Claude Code?
Run `npx skills add bluzir/claude-code-design --skill inspect -a claude-code`. Or copy the skill folder (.claude/skills/inspect in bluzir/claude-code-design) into .claude/skills/inspect in your project. Claude Code loads it when a task matches its description.
How do I install Inspect in Codex?
Run `npx skills add bluzir/claude-code-design --skill inspect -a codex`. Or copy the skill folder (.claude/skills/inspect in bluzir/claude-code-design) into .agents/skills/inspect in your project. Codex loads it when a task matches its description.
Can I use Inspect 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 bluzir/claude-code-design --skill inspect -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/inspect, .gemini/skills/inspect, .github/skills/inspect and .opencode/skills/inspect in your project.
What does Inspect need to run?
SKILL.md names no scripts, command-line tools or credentials: Inspect is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Grep, Glob, mcp__chrome-devtools__take_snapshot, mcp__chrome-devtools__evaluate_script, mcp__chrome-devtools__take_screenshot.
Does Inspect 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 Inspect 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 Inspect use?
No licence was found for Inspect or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Inspect use?
About 1.1k tokens (SKILL.md is roughly 4.3k 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 Inspect?
Skills that share tags, products or a category with Inspect: Browser Testing with Chrome DevTools (addyosmani/agent-skills, 103k stars), Diff-Driven Smoke Tests (Skyvern-AI/skyvern, 23k stars), System Bridge Testing Workflow (timmo001/system-bridge, 356 stars) and Mirroir Onboard (jfarcand/mirroir-mcp, 245 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Inspect?
bluzir (a GitHub user) maintains it in bluzir/claude-code-design, which has 106 GitHub stars. The repository holds 18 skills in this directory. The repository was last updated on April 20, 2026.
Source: bluzir/claude-code-design on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.