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.
npx skills add agentproto/ts --skill local-browsergit clone --depth 1 https://github.com/agentproto/tsWrote 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/agentproto/ts/local-browser)<a href="https://agentmods.dev/skills/agentproto/ts/local-browser"><img src="https://agentmods.dev/badge/skills/agentproto/ts/local-browser/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/agentproto/ts/local-browser"><img src="https://agentmods.dev/badge/skills/agentproto/ts/local-browser.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00054 | $0.01103 |
| Opus 5.5 | $0.00022 | $0.00441 |
| Sonnet 5.5 | $0.00011 | $0.00221 |
| Haiku 4.5 | $0.00005 | $0.00110 |
Grade A, and why
local-browser 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 1mo 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 — 116 lines — stays where its author put it; the contents beside it link to each section on GitHub.
When to use
Reach for this skill whenever the task needs to act AS THE USER in a web context. The hallmark is: an unauthenticated browser can't do this because the page requires their cookies/session.
- "Post this to LinkedIn / Twitter / Reddit" — needs their logged-in session.
- "Check my Gmail / Slack / Linear for X" — same.
- "Pull this from behind SSO."
- "Place this order on Amazon / book this flight" — payment + saved cards + addresses.
- "Comment on this PR / file this Jira ticket" — authored as them.
If the page is public and unauthenticated, prefer a regular fetch / plain scraping tool — driving a real browser is overkill and the cookies are sensitive.
What it is
The local-browser plugin (@agentproto/plugin-local-browser) is a
one-time setup that:
- Clones one of the user's existing Chrome profiles into
~/.agentproto/chrome-profile/(cookies + extensions + logins transfer). - Installs
chrome-devtools-mcpinto~/.agentproto/chrome-mcp/. - Registers it in
~/.agentproto/imported-mcps.jsonso the agentproto daemon proxies all 29 browser tools through/mcpto every tunnel-connected client.
The daemon spawns Chrome on demand against the cloned profile, so the user's daily Chrome keeps running undisturbed.
How to call it
Tools surface under the alias local-browser. From an agentproto
MCP-proxy client they're invoked via the daemon's meta-tools:
// list everything available
mcp_imported_tool_list({ alias: "local-browser" })
// drive the browser
mcp_imported_call({
alias: "local-browser",
tool: "navigate_page",
arguments: { url: "https://news.ycombinator.com" }
})
The 29 tools fall into these buckets:
| What you want | Tool(s) |
|---|---|
| Open / switch pages | new_page, navigate_page, select_page, list_pages, close_page |
| See the page | take_snapshot (AX tree), take_screenshot, list_console_messages |
| Click / type / fill | click, type_text, fill, fill_form, press_key, hover, drag |
| Wait for something | wait_for |
| Run JS | evaluate_script |
| Network inspection | list_network_requests, get_network_request |
| Perf / Lighthouse | performance_start_trace, performance_stop_trace, lighthouse_audit |
| Files / dialogs / viewport | upload_file, handle_dialog, resize_page, emulate |
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.
- 1mo ago First seen · 116 lines · 54 tokens per session scan A f3aa9fc2368b
local-browser is a skill published in the GitHub repository agentproto/ts (10 stars, last pushed today), licensed Apache-2.0. It adds 54 tokens to every session and 1,103 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-08-31.
Other skills, from other repositories
demo-recorder
Use when the user wants a scripted screen-recording demo video of a web app, a narration script or text-to-speech voice-over for one, or a dubbed cut.
playwright
Use when the task requires capturing or automating a real browser from the terminal.
playwright-cli
Automates browser interactions for web testing, form filling, screenshots, and data extraction. Use when the user needs to navigate websites, interact with web pages, fill forms, take screenshots, test web applications, or extract information from web pages.
browser-tools
Safety rules over the upstream agent-browser skill (scraping ethics, auth, request pacing, local URLs). URL policy is the Claude Code sandbox's job when the operator enables it. Use for browser automation.
qa-screenshot
Screenshot a page (deploy preview or a dev server on localhost) in the sandbox's headless Chromium, look at it, and embed it in a task comment. Use to verify a visual change or record before/after evidence.
skill-creator-primer
You MUST load this skill before the skill-creator skill AND before making ANY change to, or conducting a review of ANY Agent Skill. Triggers include creating, editing, reviewing, or contributing to any part of an Agent Skill (description, frontmatter, body, references, scripts, trigger evals, conflicts, etc).