Borrowing it
Nothing to install: this file belongs to PopoverAI/browser-automation. 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/PopoverAI/browser-automation/main/CLAUDE.mdgit clone --depth 1 https://github.com/PopoverAI/browser-automationWrote 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/popoverai/browser-automation/claude-md)<a href="https://agentmods.dev/instructions/popoverai/browser-automation/claude-md"><img src="https://agentmods.dev/badge/instructions/popoverai/browser-automation/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/popoverai/browser-automation/claude-md"><img src="https://agentmods.dev/badge/instructions/popoverai/browser-automation/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 | $0.01991 | $0.01991 |
| Opus 5 | $0.00996 | $0.00996 |
| Sonnet 5 | $0.00398 | $0.00398 |
| Haiku 4.5 | $0.00199 | $0.00199 |
Grade A, and why
browser-automation 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 3d 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 — 159 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project Overview
@popoverai/browser-automation ships the browser-demo CLI and library:
narrated demo videos from agent-browser
flows. A steps file (agent-browser commands plus a narration sentence per step)
goes in; an mp4 comes out. agent-browser owns the browser (local Chrome,
--cdp, or a cloud provider); the AI SDK owns narration; ffmpeg stitches.
It began as a fork of @browserbasehq/mcp-server-browserbase and carried a
Stagehand MCP server until agent-browser proved the better agentic interface;
that surface was removed (see README "History"). There is no MCP server, no
Stagehand, no Browserbase session management, no Docker image.
Single package, no workspace. TypeScript, ESM, Node 22+ (ai@7 sets the
floor; agent-browser itself prefers 24 but runs on 22).
What's worth doing
We are a pre-revenue startup. Work earns its place by changing something for a person using the product, or by unblocking work that does.
The common miss is insurance against futures nobody has chosen — portability away from a platform we have no plan to leave, resilience at a scale we have not reached, an abstraction over a second implementation that does not exist. The cost lands now; the benefit waits on a decision no one has made. A working system coupled to its platform is not a problem.
Before proposing work — a fix, a refactor, a ticket, a review finding — name who is affected today, at our scale, on the stack we run. If you can't, report it as an observation rather than a problem.
Layout
src/cli.ts— thebrowser-demobinary:record(default),validate,guide,schema,examplesrc/stepsFile.ts— the steps-file schema (zod/v4), its JSON Schema, and the starter example; the single source of truth for the input formatsrc/agentBrowserClient.ts— spawn-based wrapper over the agent-browser CLI (batchvia stdin JSON,stream status/enable/disable)src/agentBrowserRecorder.ts— captures the daemon's viewport stream, runs each step as oneagent-browser batch --bail, builds the timelinesrc/render.ts— per-segment narration + ffmpeg encode, concat; segment length is max(video, audio)src/speech.ts— narration through the AI SDK'sgenerateSpeech, or a pure-JS silent WAV when nospeechis configuredsrc/speechProviders.ts— CLI-side--tts <provider[:model]>resolution; openai, elevenlabs, lmnt, hume, deepgram are bundledsrc/timeline.ts—CapturedFrame/TimelineEntryshared typesSKILL.md— the agent-facing guide, printed bybrowser-demo guide; shipped in the package so it always matches the binarytests/— vitest, one file per subject; ffmpeg and agent-browser are stubbed (an exec seam and a fake stream WebSocket server), speech models areMockSpeechModelV4fromai/test
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.
- 3d ago Changed · +42 lines · +575 tokens per session 89f5751f604d
- 4d ago First seen · 117 lines · 1,416 tokens per session scan A df2682c9d06e
browser-automation CLAUDE.md is an instructions file published in the GitHub repository PopoverAI/browser-automation (2 stars, last pushed 3d ago), licensed Apache-2.0. It adds 1,991 tokens to every session, about $0.0100 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 2026-09-08.
Other instructions, from other repositories
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.
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.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
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).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).