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 agentmods add skills/jssblck/agents/computer-and-browsernpx skills add jssblck/agents --skill computer-and-browsergit clone --depth 1 https://github.com/jssblck/agentsWrote 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/jssblck/agents/computer-and-browser)<a href="https://agentmods.dev/skills/jssblck/agents/computer-and-browser"><img src="https://agentmods.dev/badge/skills/jssblck/agents/computer-and-browser.svg" alt="Measured on agentmods" 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 | $0.00088 | $0.01143 |
| Opus 5 | $0.00044 | $0.00571 |
| Sonnet 5 | $0.00018 | $0.00229 |
| Haiku 4.5 | $0.00009 | $0.00114 |
Grade A, and why
computer-and-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 2d 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.
The source is not reproduced here
Licensed GPL-3.0
The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
What ships with it
9 files 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.
- agents/openai.yaml 240 B
- extension/background.js 3.0 KB runs code
- extension/cdp.js 1.8 KB runs code
- extension/commands.js 12 KB runs code
- extension/manifest.json 860 B
- extension/pick.js 7.7 KB runs code
- extension/sessions.js 5.1 KB runs code
- mcp/agent-browser.mjs 1130 KB runs code
- native-host/bridge.mjs 4.3 KB runs code
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.
- 2d ago First seen · 61 lines · 88 tokens per session scan A 1a6c325c249c
computer-and-browser is a skill published in the GitHub repository jssblck/agents (0 stars, last pushed 4d ago), licensed GPL-3.0. It adds 88 tokens to every session and 1,143 once invoked, about $0.0004 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 2026-08-31.
Other skills, from other repositories
browser
Open, navigate, screenshot, read, click, and type in web pages from an agent. Use when the user asks to open a URL, preview or verify a running web app, check a page's console, fill a form, click through a web flow, or automate anything in a browser, including "open localhost:3000", "screenshot the page", "what does…
node-inspect-debugger
Debug Node.js via --inspect + Chrome DevTools Protocol.
frontman-agent-usage
Use this skill when an agent needs to explain or operate Frontman's browser-aware frontend coding workflow.
frontman-site-navigation
Use this skill when an agent needs to find Frontman product, documentation, legal, support, or discovery resources.
computer
Operate the user's real desktop apps and windows on macOS, Windows, or Linux. Use when the user asks to open or drive a native app, click or type in a desktop UI, inspect or arrange a window, use their signed-in system browser, or verify an end-to-end GUI flow, including "open Settings and turn on dark mode", "click…
ui-change-verification
Verify user-facing UI changes in a real browser after substantial frontend, interaction, or cross-mode architecture changes. Trigger when a task changes React UI, routing, WebSocket interaction, xterm/canvas rendering, layout, or any behavior the user can only trust through visible UI.