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 aj-geddes/useful-ai-prompts --skill browser-debugginggit clone --depth 1 https://github.com/aj-geddes/useful-ai-promptsWrote 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/aj-geddes/useful-ai-prompts/browser-debugging)<a href="https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/browser-debugging"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/browser-debugging/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/aj-geddes/useful-ai-prompts/browser-debugging"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/browser-debugging.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
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 | $0.00028 | $0.00453 |
| Opus 5 | $0.00014 | $0.00227 |
| Sonnet 5 | $0.00006 | $0.00091 |
| Haiku 4.5 | $0.00003 | $0.00045 |
Grade A, and why
browser-debugging 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 9d 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.
What it actually says
Browser Debugging
Table of Contents
Overview
Browser debugging tools help identify and fix client-side issues including JavaScript errors, layout problems, and performance issues.
When to Use
- JavaScript errors
- Layout/styling issues
- Performance problems
- User interaction issues
- Network request failures
- Animation glitches
Quick Start
Minimal working example:
Chrome DevTools Tabs:
Elements/Inspector:
- Inspect HTML structure
- Edit HTML/CSS in real-time
- View computed styles
- Check accessibility tree
- Modify DOM
Console:
- View JavaScript errors
- Execute JavaScript
- View console logs
- Monitor messages
- Clear errors
Sources/Debugger:
- Set breakpoints
- Step through code
- Watch variables
- Call stack view
- Conditional breakpoints
Network:
- View all requests
// ... (see reference guides for full implementation)
Reference Guides
Detailed implementations in the references/ directory:
| Guide | Contents |
|---|---|
| Browser DevTools Fundamentals | Browser DevTools Fundamentals |
| Debugging Techniques | Debugging Techniques |
| Common Issues & Solutions | Common Issues & Solutions |
| Performance Debugging | Performance Debugging |
Best Practices
✅ DO
- Follow established patterns and conventions
- Write clean, maintainable code
- Add appropriate documentation
- Test thoroughly before deploying
❌ DON'T
- Skip testing or validation
- Ignore error handling
- Hard-code configuration values
What ships with it
5 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.
- 9d ago First seen · 89 lines · 28 tokens per session scan A 535bd0eefcb6
browser-debugging is a skill published in the GitHub repository aj-geddes/useful-ai-prompts (334 stars, last pushed 6mo ago), licensed MIT. It adds 28 tokens to every session and 453 once invoked, about $0.0001 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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