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cloudflare-browser

Control headless Chrome via Cloudflare Browser Rendering CDP WebSocket. Use for screenshots, page navigation, scraping, and video capture when browser automation is needed in a Cloudflare Workers environment. Requires CDP_SECRET env var and cdpUrl configured in browser.profiles.

Quality

86%

Does it follow best practices?

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SecuritybySnyk

Low

Low-risk findings worth noting

SKILL.md
Quality
Evals
Security

Quality

Content

65%Weight 40%Scale 1-3

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A lean, mostly actionable reference for Cloudflare Browser Rendering that organizes its sections well and points to bundled scripts. Its main weaknesses are the undefined send() helper in the core patterns and the absence of validation checkpoints and of a reference to the bundled cdp-client.js.

Suggestions

Define or link the send() helper used in 'Common Patterns' — either inline a minimal implementation or reference scripts/cdp-client.js where it lives, so the core usage is copy-paste ready.

Add explicit validation checkpoints to the screenshot and video workflows (e.g., confirm the page loaded / screenshot bytes are non-empty before proceeding) rather than relying on a fixed setTimeout.

Reference cdp-client.js alongside screenshot.js and video.js in Quick Start so all bundle files the body depends on are discoverable.

DimensionReasoningScore

Conciseness

The body is lean and code-first, assuming Claude's competence; it never explains concepts Claude already knows (what CDP is, how browsers work) and inline comments are minimal and justified. Not a 2 because there is no padded or unnecessary explanation to tighten.

3 / 3

Actionability

The CLI commands and the WebSocket connection snippet are copy-paste ready, but the 'Common Patterns' examples rely on an undefined send() helper that is never defined in the body, leaving the core usage incomplete. Not a 3 because the central usage is not fully self-contained; not a 1 because substantial executable code and commands are present.

2 / 3

Workflow Clarity

Steps are sequenced (Creating Videos is numbered, screenshot flow is ordered) but lack validation checkpoints — the screenshot flow uses an implicit setTimeout 'wait for render' with no verification, and batch frame capture has no success checks. Per the rubric, batch operations missing validation cap at 2; not a 1 because sequences are present.

2 / 3

Progressive Disclosure

Sections are well-organized and Quick Start references real one-level-deep scripts (screenshot.js, video.js), but the body uses send() from cdp-client.js — a real bundle file that is never referenced — and the core CDP patterns are inline rather than split out. Not a 3 due to the missing cdp-client.js navigation link; not a 1 because structure and script references exist.

2 / 3

Total

9

/

12

Passed

Description

100%Weight 40%Scale 1-3

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong, specific description that clearly states what the skill does and when to use it, with natural trigger terms and a distinct, conflict-resistant niche. No vague fluff or voice issues.

DimensionReasoningScore

Specificity

Enumerates multiple concrete actions ('screenshots, page navigation, scraping, and video capture') rather than naming only a domain, matching the multiple-specific-actions anchor; not a 2 since actions are explicit and listed.

3 / 3

Completeness

Explicitly states both what ('Control headless Chrome via Cloudflare Browser Rendering CDP WebSocket') and when ('Use for ... when browser automation is needed in a Cloudflare Workers environment'), satisfying the explicit-trigger anchor; not a 2 because the 'when' clause is present and explicit.

3 / 3

Trigger Term Quality

Uses natural terms a developer would actually say — 'screenshots', 'scraping', 'video capture', 'browser automation', 'Cloudflare Workers' — giving good coverage rather than only technical jargon.

3 / 3

Distinctiveness Conflict Risk

The niche is tightly scoped to Cloudflare Browser Rendering / CDP / Workers, making accidental triggering for unrelated skills unlikely; not a 2 since it would not meaningfully overlap with generic browser-automation skills.

3 / 3

Total

12

/

12

Passed

Validation

100%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository

cloudflare/moltworker

Path

skills/cloudflare-browser/SKILL.md

Reviewed

Table of Contents

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