Borrowing it
Nothing to install: this file belongs to scrollDynasty/BrowserMesh. 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/scrollDynasty/BrowserMesh/master/AGENTS.mdgit clone --depth 1 https://github.com/scrollDynasty/BrowserMeshWrote 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/scrolldynasty/browsermesh/agents-md)<a href="https://agentmods.dev/instructions/scrolldynasty/browsermesh/agents-md"><img src="https://agentmods.dev/badge/instructions/scrolldynasty/browsermesh/agents-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/scrolldynasty/browsermesh/agents-md"><img src="https://agentmods.dev/badge/instructions/scrolldynasty/browsermesh/agents-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 | $0.07748 | $0.07748 |
| Opus 5.5 | $0.03099 | $0.03099 |
| Sonnet 5.5 | $0.01550 | $0.01550 |
| Haiku 4.5 | $0.00775 | $0.00775 |
Grade A, and why
BrowserMesh AGENTS.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 1mo 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 — 1,273 lines — stays where its author put it; the contents beside it link to each section on GitHub.
BrowserMesh — Autonomous Implementation Agent Instructions
CLAUDE.mdis the always-in-context working subset of this charter: sections 1–4, 14–16, and 22, plus the commands and gotchas that only ever lived indocs/development.md. This file remains canonical; when the two disagree, this one wins. Repeatable procedures are skills in.claude/skills/.Working in this repository with the
browsermeshMCP server? Run the GitHub Preflight once per session — never ahead of the user's first browser operation — and follow GitHub Issue Reporting when BrowserMesh misbehaves. Both are at the end of this file.
You are the principal software engineer and autonomous coding agent responsible for implementing and maintaining the open-source project BrowserMesh.
Your objective is not merely to write code.
Your objective is to independently bring BrowserMesh to a complete, tested, internally consistent v0.1 implementation that satisfies:
docs/SPEC.md;docs/architecture.md;- applicable ADRs;
- public MCP contracts;
- the project's Definition of Done.
Work autonomously inside the repository.
Do not stop after a single file, feature, milestone, or successful test.
1. Responsibility boundary
This is a critical invariant.
BrowserMesh v0.1 is not an internal AI-agent runtime.
The intended flow is:
User
↓
external AI client
↓ MCP
BrowserMesh
↓
isolated browser sessions
Examples of external AI/MCP clients include:
- Claude Code;
- Codex;
- Cursor;
- Qwen;
- other MCP-compatible clients.
The external client performs:
- reasoning;
- planning;
- workflow orchestration;
- deciding which BrowserMesh tools to call.
BrowserMesh performs browser execution.
Do not introduce into v0.1:
- internal Agent entities;
- Agent registries;
browser_agent_*tools;- LLM-owned session principals;
- Agent ownership;
- Agent mailboxes;
- agent-to-agent messaging;
browser_message_*tools;- internal LLM calls;
- prompt orchestration;
- autonomous reasoning loops inside BrowserMesh;
- Claude/Codex/Qwen process spawning.
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.
- 1mo ago Changed · +436 lines · +3,726 tokens per session 944a8f311749
- 2mo ago First seen · 837 lines · 4,022 tokens per session scan A 266bca703fe7
BrowserMesh AGENTS.md is an instructions file published in the GitHub repository scrollDynasty/BrowserMesh (3 stars, last pushed 2d ago), licensed Apache-2.0. It adds 7,748 tokens to every session, about $0.0310 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 2026-08-31.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
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Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
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vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.