Modern Web Guidance is a set of agent skills that supplies coding agents with curated advice on current web platform APIs, browser compatibility, performance, and accessibility. It helps agents choose newer browser capabilities instead of reproducing older web development patterns, and the catalogue entries are its installable skills and plugin.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
git clone --depth 1 https://github.com/GoogleChrome/modern-web-guidanceWrote 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/plugins/googlechrome/modern-web-guidance/gemini-extension)<a href="https://agentmods.dev/plugins/googlechrome/modern-web-guidance/gemini-extension"><img src="https://agentmods.dev/badge/plugins/googlechrome/modern-web-guidance/gemini-extension/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/plugins/googlechrome/modern-web-guidance/gemini-extension"><img src="https://agentmods.dev/badge/plugins/googlechrome/modern-web-guidance/gemini-extension.svg" alt="Reviewed on agentmods" width="80" height="20"></a>Grade A, and why
modern-web-guidance 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 5d 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.
This is a copy
89% identical to modern-web-guidance — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
{
"name": "modern-web-guidance",
"description": "Keep your coding agent up to date with the latest web best practices",
"version": "0.0.194",
"author": {
"name": "Google Chrome"
}
}
What ships with it
1 file beside gemini-extension.json 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.
- 5d ago Changed d7cab242b692
- 10d ago Changed 31c697a2eae7
- 12d ago Changed 9e2c5d1ff45f
- 19d ago Changed a48ad52bebe2
- 26d ago Changed b102c8896db8
- 1mo ago Changed bd809f6c80ee
- 1mo ago Changed 07539aa56507
- 1mo ago First seen · 9 lines scan A b09c202b2ba9
modern-web-guidance is a plugin published in the GitHub repository GoogleChrome/modern-web-guidance (2,495 stars, last pushed 5d ago), licensed Apache-2.0. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. It is 89% identical to modern-web-guidance, differing in 0 lines, and is treated as a copy.
Other plugins, from other repositories
humanizer
Rewrite AI-sounding text so it reads like the writer without changing what it says.
nextjs
Official Next.js skills: adopt and optimize Cache Components, adopt Partial Prefetching, and verify runtime behavior against a running dev server.
themes-example
themes-example. An open-source AI agent that brings the power of Gemini directly into your terminal.
claude-plugins-official marketplace
Directory of popular Claude Code extensions including development tools, productivity plugins, and MCP integrations.
knowledge-work-plugins marketplace
Plugin marketplace listing 123 plugins: noibu, productivity, enterprise-search, cowork-plugin-management, sales.
code-modernization
Guided modernization for any legacy codebase: start with /modernize, get an assessment, an interactive map, the business rules mined from the code, and a plan you approve, then an upgrade, a rewrite or a rebuild with independent proof that the new code behaves like the old. Includes security hardening, a one-page…