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 khalilbenaz/claude-skills-collection --skill browser-agent-buildergit clone --depth 1 https://github.com/khalilbenaz/claude-skills-collectionWrote 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/khalilbenaz/claude-skills-collection/browser-agent-builder)<a href="https://agentmods.dev/skills/khalilbenaz/claude-skills-collection/browser-agent-builder"><img src="https://agentmods.dev/badge/skills/khalilbenaz/claude-skills-collection/browser-agent-builder/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/khalilbenaz/claude-skills-collection/browser-agent-builder"><img src="https://agentmods.dev/badge/skills/khalilbenaz/claude-skills-collection/browser-agent-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 23 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 180 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00067 | $0.01983 |
| Opus 5 | $0.00034 | $0.00992 |
| Sonnet 5 | $0.00013 | $0.00397 |
| Haiku 4.5 | $0.00007 | $0.00198 |
Grade A, and why
browser-agent-builder 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 10d 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 — 201 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Browser Agent Builder
1. Choisir le framework
| Critère | Playwright | Puppeteer | Selenium |
|---|---|---|---|
| Multi-navigateur | ✅ Chromium, Firefox, WebKit | ❌ Chrome/Edge uniquement | ✅ tous |
| Auto-wait natif | ✅ | ❌ (manuel) | ❌ (manuel) |
| Interception réseau | ✅ route() |
✅ setRequestInterception |
❌ limité |
| Support mobile | ✅ devices preset |
❌ | ❌ |
| Ecosystème / doc | Excellent (2024–2026) | Bon | Vieillissant |
Décision : Playwright par défaut sur tout nouveau projet. Puppeteer si contrainte Chrome-only ou lib existante. Selenium uniquement legacy/Java.
# Installation Playwright (Node.js)
npm init -y && npm i -D playwright
npx playwright install chromium # ou --with-deps pour CI
# Python
pip install playwright && playwright install chromium
2. Architecture de l'agent
┌───────────────────────────────────────────────┐
│ Orchestrateur │
│ (LLM : planifie, décide, retry si échec) │
└────────┬──────────────┬────────────┬──────────┘
│ │ │
Navigation Extraction Mémoire/État
(goto/click/fill) (DOM/vision) (cookies, historique)
Composants minimaux :
- Navigator : wraps
page.goto / click / fill / keyboard - Extractor :
page.$eval,locator, screenshot → LLM - SessionStore : persist cookies + localStorage sur disque
- DecisionLoop : LLM reçoit DOM/screenshot, émet actions structurées
3. Implémenter l'interaction DOM robuste
// Sélecteurs stables — ordre de préférence
page.getByRole('button', { name: 'Valider' }) // 1er choix
page.getByTestId('submit-btn') // 2e choix
page.getByLabel('Email') // 3e choix
page.locator('[data-id="checkout"]') // 4e choix
// Jamais : page.locator('.css-1a2b3c') // ❌ généré dynamiquement
// Auto-wait + retry inclus dans Playwright — ne pas ajouter de sleep manuel
await page.getByRole('button', { name: 'Valider' }).click()
// Shadow DOM
const shadow = page.locator('my-component').locator('pierce=button')
// iFrame
const frame = page.frameLocator('#checkout-iframe')
await frame.getByLabel('Numéro carte').fill('4111111111111111')
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.
- 10d ago First seen · 201 lines · 67 tokens per session scan A e0a24689c408
browser-agent-builder is a skill published in the GitHub repository khalilbenaz/claude-skills-collection (22 stars, last pushed 16d ago), licensed MIT. It adds 67 tokens to every session and 1,983 once invoked, about $0.0003 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 2026-08-30.
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