Borrowing it
Nothing to install: this file belongs to s-hiraoku/vscode-sidebar-terminal. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/s-hiraoku/vscode-sidebar-terminal/main/.claude/skills/mcp-chrome-devtools/SKILL.mdgit clone --depth 1 https://github.com/s-hiraoku/vscode-sidebar-terminalWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/s-hiraoku/vscode-sidebar-terminal/mcp-chrome-devtools)<a href="https://agentmods.dev/skills/s-hiraoku/vscode-sidebar-terminal/mcp-chrome-devtools"><img src="https://agentmods.dev/badge/skills/s-hiraoku/vscode-sidebar-terminal/mcp-chrome-devtools/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/s-hiraoku/vscode-sidebar-terminal/mcp-chrome-devtools"><img src="https://agentmods.dev/badge/skills/s-hiraoku/vscode-sidebar-terminal/mcp-chrome-devtools.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Memory Poisoning · line 83 Skill attempts to fill the context window with filler content, displacing legitimate instructions and safety constraints. This can degrade agent performance or bypass safety boundaries.Fix: Implement context-window management that detects and rejects padding or stuffing attempts. Prioritize system instructions over user-injected content.
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00050 | $0.01258 |
| Opus 5 | $0.00025 | $0.00629 |
| Sonnet 5 | $0.00010 | $0.00252 |
| Haiku 4.5 | $0.00005 | $0.00126 |
Grade A, and why
mcp-chrome-devtools scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 199 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Chrome DevTools MCP
Overview
This skill enables browser debugging and automation using Chrome DevTools through MCP. It provides access to Chrome DevTools features including page interaction, network analysis, console inspection, and performance tracing.
When to Use This Skill
- Debugging web page issues
- Analyzing network requests and responses
- Inspecting console messages and errors
- Performance profiling and tracing
- Automated page interaction and testing
- Taking screenshots and snapshots
Quick Start Workflow
- List pages:
list_pages - Select a page:
select_page - Take snapshot:
take_snapshot - Interact using uids from snapshot
Core Tools
Page Management
list_pages - Get all open pages
mcp__chrome-devtools__list_pages({})
select_page - Select a page for operations
mcp__chrome-devtools__select_page({ pageIdx: 0 })
new_page - Create a new page
mcp__chrome-devtools__new_page({ url: "https://example.com" })
close_page - Close a page
mcp__chrome-devtools__close_page({ pageIdx: 1 })
navigate_page - Navigate the selected page
mcp__chrome-devtools__navigate_page({ type: "url", url: "https://example.com" })
mcp__chrome-devtools__navigate_page({ type: "back" })
mcp__chrome-devtools__navigate_page({ type: "reload", ignoreCache: true })
Snapshots and Screenshots
take_snapshot - Get accessibility tree (preferred for interaction)
mcp__chrome-devtools__take_snapshot({})
take_screenshot - Capture visual screenshot
mcp__chrome-devtools__take_screenshot({
format: "png",
fullPage: true,
filePath: "./screenshot.png"
})
Element Interaction
click - Click an element
mcp__chrome-devtools__click({ uid: "element-uid" })
mcp__chrome-devtools__click({ uid: "element-uid", dblClick: true })
fill - Fill input or select option
mcp__chrome-devtools__fill({ uid: "input-uid", value: "text" })
fill_form - Fill multiple form elements
mcp__chrome-devtools__fill_form({
elements: [
{ uid: "username-uid", value: "user" },
{ uid: "password-uid", value: "pass" }
]
})
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 199 lines · 50 tokens per session scan A 1dfeee5ba13b
mcp-chrome-devtools is a skill published in the GitHub repository s-hiraoku/vscode-sidebar-terminal (21 stars, last pushed yesterday), licensed MIT. It adds 50 tokens to every session and 1,258 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-01.
Other skills, from other repositories
chrome-devtools-cli
Use this skill to write shell scripts or run shell commands to automate tasks in the browser or otherwise use Chrome DevTools via CLI.
a11y-debugging
Uses Chrome DevTools MCP for accessibility (a11y) debugging and auditing based on web.dev guidelines. Use when testing semantic HTML, ARIA labels, focus states, keyboard navigation, tap targets, and color contrast.
chrome-devtools
Uses Chrome DevTools via MCP for efficient debugging, troubleshooting and browser automation. Use when debugging web pages, automating browser interactions, analyzing performance, or inspecting network requests. This skill does not apply to --slim mode (MCP configuration).
chrome-performance-optimizer
Autonomous multi-agent performance optimization loop for Chromium and V8. Supports profile-seeded mode (analyzing Speedometer 3 / JetStream profiles via pprof or Sagacity MCP) and pattern-driven discovery mode (fan-out exploration of Blink and V8 macro-patterns grounded in historical wins and past rejected CLs).…
nullaway
Guide for resolving NullAway static analysis errors. Best practices for: Passing ObservableSupplier/Supplier Dereferencing potentially @Nullable values Adding @NullMarked to Java code.
bisect
Bisect regressions or broken builds in the Chromium repository using deterministic binary search, checking out midpoint commits, syncing dependencies with gclient sync, compiling the target with autoninja, and querying the user for test results until the culprit commit is isolated.