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/fr3kstyle/fr3k/browsernpx skills add fr3kstyle/fr3k --skill browsergit clone --depth 1 https://github.com/fr3kstyle/fr3kWrote 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/fr3kstyle/fr3k/browser)<a href="https://agentmods.dev/skills/fr3kstyle/fr3k/browser"><img src="https://agentmods.dev/badge/skills/fr3kstyle/fr3k/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 | $0.00038 | $0.01999 |
| Opus 5 | $0.00019 | $0.01000 |
| Sonnet 5 | $0.00008 | $0.00400 |
| Haiku 4.5 | $0.00004 | $0.00200 |
Grade A, and why
Browser scanned grade A with 1 finding 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 4d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s -X POST http://localhost:8888/notify \ The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What ships with it
19 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.
- .gitignore 185 B
- examples/comprehensive-test.ts 13 KB runs code
- examples/screenshot.ts 1.8 KB runs code
- examples/verify-page.ts 2.4 KB runs code
- http:/localhost:5173/ideas 787 KB
- http:/localhost:5173/ideas#the-full-archive 787 KB
- index.ts 23 KB runs code
- package.json 323 B
- README.md 5.2 KB
- Tools/Browse.ts 19 KB runs code
- Tools/BrowserSession.ts 14 KB runs code
- Tools/https:/danielmiessler.com/blog/introducing-amazon-curate-i-wish 8.3 KB
- tsconfig.json 404 B
- Workflows/AutomatedTest.md 2.4 KB
- Workflows/Extract.md 2.6 KB
- Workflows/Interact.md 2.6 KB
- Workflows/Screenshot.md 1.5 KB
- Workflows/Update.md 2.3 KB
- Workflows/VerifyPage.md 2.1 KB
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.
- 4d ago First seen · 289 lines · 38 tokens per session scan A b2e11cef7344
Browser is a skill published in the GitHub repository fr3kstyle/fr3k (2 stars, last pushed 6mo ago), with no licence file. It adds 38 tokens to every session and 1,999 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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