Figma Design System Builder
warpdotdev/warp
Builds or updates a design system in Figma from a codebase in ordered phases: discovery, variables and tokens, components, theming and documentation, with checkpoints.
Visual verification of a running page through Chrome's DevTools Protocol, capturing screenshots and measuring the rendered DOM.
Install Cdp
$ npx skills add wellwelwel/lagune --skill cdp -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install wellwelwel/lagune cdp --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/wellwelwel/lagune.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/cdp .claude/skills/cdp && 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 "cdp" agent skill from https://github.com/wellwelwel/lagune/tree/main/.claude/skills/cdp into .claude/skills/cdp/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cdp", 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/wellwelwel/lagune/tree/main/.claude/skills/cdpType 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 wellwelwel/lagune --skill cdp -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install wellwelwel/lagune cdp --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/wellwelwel/lagune.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/cdp .agents/skills/cdp && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "cdp" agent skill from https://github.com/wellwelwel/lagune/tree/main/.claude/skills/cdp into .agents/skills/cdp/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cdp", 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 wellwelwel/lagune --skill cdp -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install wellwelwel/lagune cdp --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/wellwelwel/lagune.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/cdp .cursor/skills/cdp && 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 "cdp" agent skill from https://github.com/wellwelwel/lagune/tree/main/.claude/skills/cdp into .cursor/skills/cdp/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cdp", 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/wellwelwel/lagune.git --path .claude/skills/cdp--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 wellwelwel/lagune --skill cdp -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install wellwelwel/lagune cdp --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/wellwelwel/lagune.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/cdp .gemini/skills/cdp && 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 "cdp" agent skill from https://github.com/wellwelwel/lagune/tree/main/.claude/skills/cdp into .gemini/skills/cdp/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cdp", 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 wellwelwel/lagune cdpInstalls 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 wellwelwel/lagune --skill cdp -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/wellwelwel/lagune.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/cdp .github/skills/cdp && 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 "cdp" agent skill from https://github.com/wellwelwel/lagune/tree/main/.claude/skills/cdp into .github/skills/cdp/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cdp", 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 wellwelwel/lagune --skill cdp -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install wellwelwel/lagune cdp --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/wellwelwel/lagune.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/cdp .opencode/skills/cdp && 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 "cdp" agent skill from https://github.com/wellwelwel/lagune/tree/main/.claude/skills/cdp into .opencode/skills/cdp/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cdp", 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
cdp- GitHub stars
- 173
- Token cost
- ~749 tokens
- SKILL.md length
- 325 words
- Files
- 2
- Skills in repo
- 8
- Repo updated
- First seen
- Licence
- MIT
At a glance
Visual verification of a running page through Chrome's DevTools Protocol, capturing screenshots and measuring the rendered DOM.
- A frontend change can only be confirmed once rendered
- SKILL.md covers Measure, never eyeball, When to use it, Dependencies and Running it
- Runs TypeScript scripts from its folder; calls npx and npm
- Tasks that involve Design tokens
What it does
Cdp is an agent skill from wellwelwel/lagune. Visual verification of a running page through Chrome's DevTools Protocol, capturing screenshots and measuring the rendered DOM. Use when a frontend change can only be confirmed once rendered, for layout, spacing, alignment, overflow, or theme tokens.
Its SKILL.md is about 750 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `tools/cdp.ts`).
It sits in Frontend & Design, covering Design tokens. The repository describes itself as: 🌊 Lagune is your security copilot as you build, your Blue Team when you audit, whether you're a developer or not (no API key needed). The licence is MIT.
When your agent uses it
- A frontend change can only be confirmed once rendered
- Tasks that involve Design tokens
Example prompts
- “/cdp”
Requirements
- Node.js
What it can do on your machine
Read from SKILL.md and the folder at commit c97ddfc. 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
Ships script files (TypeScript), which the agent can run.
Shell commands in SKILL.md call:
npxnpm
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use npx and npm, which can reach the network depending on how they are called.
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
Cdp loads about 749 tokens when it runs. Until then it costs about 64 tokens; SKILL.md has 325 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 wellwelwel/lagune at commit c97ddfc, republished under its MIT licence (© wellwelwel). 325 words, ~749 tokens.
Download SKILL.mdSave it as
.claude/skills/cdp/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- cdp
- description
- Visual verification of a running page through Chrome's DevTools Protocol, capturing screenshots and measuring the rendered DOM. Use when a frontend change can only be confirmed once rendered, for layout, spacing, alignment, overflow, or theme tokens.
- user-invocable
- true
- metadata.author
- Weslley Araújo
- metadata.version
- 1.0.0
- metadata.source
- https://github.com/wellwelwel/skills
Rendered result verification
This skill owns the verification of what the browser actually renders. It drives a running page through Chrome's built-in DevTools Protocol (CDP) to inspect the DOM, computed styles, and layout, and to capture screenshots. It works against any URL, whatever app or domain is serving it.
Measure, never eyeball
For any spacing or alignment claim, measure the rendered DOM and report the numbers. Read geometry off the elements themselves, for example the box between an element and its container's edges, and state the values you found. A screenshot that looks aligned is not evidence.
When to use it
Reach for it when a change is hard to verify from the source alone: layout, spacing, alignment, overflow, theme tokens, or anything that only shows up once rendered. Skip it for simple, self-evident edits, for example adding a shadow, where the result is obvious from the diff.
Dependencies
The helper needs playwright and tsx. Check each with npm ls <package>, install whatever is missing as a development dependency with the package manager the root lockfile points to, then fetch the pinned browser with npx playwright install chromium.
Running it
The helper ships with this skill, at tools/cdp.ts next to this file. Run it from the project root under npx tsx, pointing at wherever the skill is installed, and write the PNGs to a directory the project ignores in git.
npx tsx <path-to-this-skill>/tools/cdp.ts --out ./temp/shots --shot 'label|<url>'| Flag | Purpose |
|---|---|
--shot 'label|url' | One capture, repeatable. The label names the PNG |
--measure <expr> | Expression evaluated on every shot, its value printed with the shot |
--out <dir> | Where the PNGs are written |
--attach <port> | Reuse a Chromium already exposing a CDP endpoint |
--width, --height, --scale | Viewport and device pixel ratio |
--settle <ms> | Wait after load before measuring and capturing |
Put any query params the page supports, a forced theme, a route, or a flag, straight in the URL. Take the same shot before and after a change when the point is the difference between them.
© wellwelwel, 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 1 other file in .claude/skills/cdp of wellwelwel/lagune.
- SKILL.md
- tools/cdp.ts
Open the folder on GitHubat commit c97ddfc
Compare with similar skills
Cdp 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 |
|---|---|---|---|---|---|---|
| Cdp this skillwellwelwel/lagune | 173 | — | ~749 | Automated safety check: Pass | MIT | |
| Figma Design System Builderwarpdotdev/warp | 65k | 2 repos | ~4.4k | Automated safety check: Pass | AGPL-3.0 | |
| Figma use_figma Plugin API Ruleswarpdotdev/warp | 65k | 4 repos | ~4.4k | Automated safety check: Pass | AGPL-3.0 | |
| MCP Developmentcoollabsio/coolify | 63k | 1 repos | ~949 | Automated safety check: Pass | MIT | |
| Design SystemOhh-889/skyroc | 795 | 11 repos | ~1.7k | Automated safety check: Pass | MIT | |
| Design Dnazanwei/design-dna | 1.9k | 1 repos | ~2.1k | Automated safety check: Pass | MIT |
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Related
Categories
Questions about Cdp
What does Cdp do?
Visual verification of a running page through Chrome's DevTools Protocol, capturing screenshots and measuring the rendered DOM. Cdp is an agent skill from wellwelwel/lagune. Visual verification of a running page through Chrome's DevTools Protocol, capturing screenshots and measuring the rendered DOM.
When should I use Cdp?
Cdp fits situations like: A frontend change can only be confirmed once rendered; tasks that involve Design tokens.
How do I install Cdp in Claude Code?
Run `npx skills add wellwelwel/lagune --skill cdp -a claude-code`. Or copy the skill folder (.claude/skills/cdp in wellwelwel/lagune) into .claude/skills/cdp in your project. Claude Code loads it when a task matches its description.
How do I install Cdp in Codex?
Run `npx skills add wellwelwel/lagune --skill cdp -a codex`. Or copy the skill folder (.claude/skills/cdp in wellwelwel/lagune) into .agents/skills/cdp in your project. Codex loads it when a task matches its description.
Can I use Cdp 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 wellwelwel/lagune --skill cdp -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/cdp, .gemini/skills/cdp, .github/skills/cdp and .opencode/skills/cdp in your project.
What does Cdp need to run?
Going by SKILL.md and its folder, Cdp needs TypeScript for the scripts in its folder and the command-line tools its instructions call (npx and npm). Our summary lists: Node.js.
Does Cdp access the network?
SKILL.md contains no URLs. Its commands use npx and npm, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Cdp 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 Cdp use?
Cdp 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 Cdp use?
About 749 tokens (SKILL.md is roughly 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 Cdp?
Skills that share tags, products or a category with Cdp: Figma Design System Builder (warpdotdev/warp, 65k stars), Figma use_figma Plugin API Rules (warpdotdev/warp, 65k stars), MCP Development (coollabsio/coolify, 63k stars) and Design System (Ohh-889/skyroc, 795 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Cdp?
wellwelwel (a GitHub user) maintains it in wellwelwel/lagune, which has 173 GitHub stars. The repository holds 8 skills in this directory. The repository was last updated on October 8, 2026.
Source: wellwelwel/lagune on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.