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/twaldin/flt/browser-usenpx skills add twaldin/flt --skill browser-usegit clone --depth 1 https://github.com/twaldin/fltWhat 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 | $0.00047 | $0.02306 |
| Opus 5 | $0.00023 | $0.01153 |
| Sonnet 5 | $0.00009 | $0.00461 |
| Haiku 4.5 | $0.00005 | $0.00231 |
Grade A, and why
browser-use 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 3d 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 — 236 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Browser Automation with browser-use CLI
The browser-use command provides fast, persistent browser automation. A background daemon keeps the browser open across commands, giving ~50ms latency per call.
Prerequisites
browser-use doctor # Verify installation
For setup details, see https://github.com/browser-use/browser-use/blob/main/browser_use/skill_cli/README.md
Core Workflow
- Navigate:
browser-use open <url>— launches headless browser and opens page - Inspect:
browser-use state— returns clickable elements with indices - Interact: use indices from state (
browser-use click 5,browser-use input 3 "text") - Verify:
browser-use stateorbrowser-use screenshotto confirm - Repeat: browser stays open between commands
If a command fails, run browser-use close first to clear any broken session, then retry.
To use the user's existing Chrome (preserves logins/cookies): run browser-use connect first.
To use a cloud browser instead: run browser-use cloud connect first.
After either, commands work the same way.
If browser-use connect fails
When browser-use connect cannot find a running Chrome with remote debugging, prompt the user with two options:
- Use their real Chrome browser — they need to enable remote debugging first:
- Open
chrome://inspect/#remote-debuggingin Chrome, or relaunch Chrome with--remote-debugging-port=9222 - Then retry
browser-use connect
- Open
- Use managed Chromium with their Chrome profile — no Chrome setup needed:
- Run
browser-use profile listto show available profiles - Ask which profile they want, then use
browser-use --profile "ProfileName" open <url> - This launches a separate Chromium instance with their profile data (cookies, logins, extensions)
- Run
Let the user choose — don't assume one path over the other.
Browser Modes
browser-use open <url> # Default: headless Chromium (no setup needed)
browser-use --headed open <url> # Visible window (for debugging)
browser-use connect # Connect to user's Chrome (preserves logins/cookies)
browser-use cloud connect # Cloud browser (zero-config, requires API key)
browser-use --profile "Default" open <url> # Real Chrome with specific profile
What ships with it
2 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.
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.
- 3d ago First seen · 236 lines · 47 tokens per session scan A 3321af86d2ea
browser-use is a skill published in the GitHub repository twaldin/flt (5 stars, last pushed 1mo ago), licensed MIT. It adds 47 tokens to every session and 2,306 once invoked, about $0.0002 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.
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