Borrowing it
Nothing to install: this file belongs to roshanarnav25-sloth/google-flow-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/roshanarnav25-sloth/google-flow-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/roshanarnav25-sloth/google-flow-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/roshanarnav25-sloth/google-flow-mcp/claude-md)<a href="https://agentmods.dev/instructions/roshanarnav25-sloth/google-flow-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/roshanarnav25-sloth/google-flow-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/roshanarnav25-sloth/google-flow-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/roshanarnav25-sloth/google-flow-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 | $0.00631 | $0.00631 |
| Opus 5 | $0.00316 | $0.00316 |
| Sonnet 5 | $0.00126 | $0.00126 |
| Haiku 4.5 | $0.00063 | $0.00063 |
Grade A, and why
google-flow-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 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 — 64 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Notes for AI coding agents
Guidance for Claude Code and similar agents working in this repo. Humans should read CONTRIBUTING.md instead — it covers the same ground with more context.
What this is
An MCP server that drives Google Flow (labs.google's Veo / Nano Banana tool) through a real browser session. Flow has no public API, but its frontend is a tRPC client — so this speaks that undocumented API first and falls back to DOM clicking only for surfaces with no endpoint.
Read ARCHITECTURE.md before changing the transport layer or the cost gate. It carries the reasoning, not just the shape.
Hard rules
This code spends real money. These are not style preferences.
- The cost gate is the point. Never move a budget check to after Approve. Every refusal must happen while rejection is still free.
- Never guess a tRPC procedure name. A wrong GET is a 404; a wrong mutation can
charge. New endpoints come from
flow_discover_api, not from constants. - Never resubmit an in-flight generation. Completion is detected by diffing the media library, precisely so the composer is never touched twice.
- Never widen a text match near Approve.
checkApproveversus the "Approve, do not ask again" row — seereferences/ui-playbook.md. A loose match disables the cost gate for the whole session. - This server handles no credentials, ever. It attaches to a browser a human signed into. Re-auth walls stop the run and hand back to the human.
- Fail toward a refusal. When wrong about Flow's UI, cost nothing and say which control could not be found.
Before you claim it works
npm run typecheck && npm run lint && npm run format:check && npm test && npm run build
Then confirm the tool surface still loads — a server whose tools fail to register is broken regardless of what compiles:
npm run inspect
Browser-driving code cannot be unit tested. Do not describe it as verified on the basis of a passing build; the README tracks verification status per surface, and it should stay honest.
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 · 64 lines · 631 tokens per session scan A 83688163959a
google-flow-mcp CLAUDE.md is an instructions file published in the GitHub repository roshanarnav25-sloth/google-flow-mcp (14 stars, last pushed 25d ago), licensed MIT. It adds 631 tokens to every session, about $0.0032 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.
Other instructions, from other repositories
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).
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).
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.
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.