Borrowing it
Nothing to install: this file belongs to brian-ln/stealth-browser-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/brian-ln/stealth-browser-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/brian-ln/stealth-browser-mcpWrote 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/instructions/brian-ln/stealth-browser-mcp/claude-md)<a href="https://agentmods.dev/instructions/brian-ln/stealth-browser-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/brian-ln/stealth-browser-mcp/claude-md/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/instructions/brian-ln/stealth-browser-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/brian-ln/stealth-browser-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00303 | $0.00303 |
| Opus 5.5 | $0.00121 | $0.00121 |
| Sonnet 5.5 | $0.00061 | $0.00061 |
| Haiku 4.5 | $0.00030 | $0.00030 |
Grade A, and why
stealth-browser-mcp CLAUDE.md 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 2mo 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
stealth-browser-mcp Guidelines
Workflow
- Use a git feature based workflow and always work in a feature and make sure we commit things along the way.
- Don't mix features in a single branch. If we need to work on multiple features, create separate branches.
- If we learn something along the way about how to work better please share it with me and if I agree you can add it to this file. Don't ever add anything here with my specific approval.
- You've got tools, use them!
Commands
- Run:
bun run index.ts- Run the main application - Dev:
bun --watch index.ts- Run with live reloading
Code Style
- Imports: Use named imports, sort alphabetically, group by type
- Formatting: 2-space indentation, trailing semicolons
- Types: Prefer explicit typing with interfaces over types when possible
- Naming: camelCase for variables/functions, PascalCase for classes/types
- Error Handling: Use try/catch with specific error types, avoid generic catches
- Comments: JSDoc for public APIs, inline for complex logic
- Async: Prefer async/await over raw Promises
- Stealth Browser: Follow puppeteer-extra plugin patterns for stealth features
Project Structure
index.ts: Main application entry point
This project uses Bun and TypeScript with ESM modules.
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.
- 2mo ago First seen · 27 lines · 303 tokens per session scan A 04b247083391
stealth-browser-mcp CLAUDE.md is an instructions file published in the GitHub repository brian-ln/stealth-browser-mcp (25 stars, last pushed 1y ago), licensed MIT. It adds 303 tokens to every session, about $0.0012 per session on Opus 5.5. 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.
stealth-browser-mcp CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| stealth-browser-mcp CLAUDE.mdbrian-ln/stealth-browser-mcp | Instructions file | 25 | 1y ago | MIT | A | 303 | Claude Code |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,649 | GitHub Copilot |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| vscode model-prompts.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 2,022 | GitHub Copilot |