cdp SKILL.md skillA
cdp from wellwelwel/lagune is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add wellwelwel/lagune/cdp@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- wellwelwel/lagune
- Path
.claude/skills/cdp/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Oct 3, 2026
- Size
- 2,995 bytes
- Repository stars
- 173
- License
- MIT
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.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# 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`. …
Read the whole file at its exact version.
How to install
mdr add wellwelwel/lagune/cdp@sha256:e182475a74b09efeThe line at the top of this page pins the label v1.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_5tl34zx2dsdxfxrz)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 3, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (2995 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
wellwelwel/lagune · 173 stars · license MIT · pushed 2026-10-15 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_5tl34zx2dsdxfxrz GET https://markdownregistry.com/api/v1/resolve?ref=wellwelwel/lagune/cdp GET https://markdownregistry.com/api/v1/blob/e182475a74b09efe58cd05147971e0fab85ce1aab77872a99edda1cfddc74209
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.