Borrowing it
Nothing to install: this file belongs to fastslack/mtw-e2e-runner. 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/fastslack/mtw-e2e-runner/main/CLAUDE.mdgit clone --depth 1 https://github.com/fastslack/mtw-e2e-runnerWrote 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/fastslack/mtw-e2e-runner/claude-md)<a href="https://agentmods.dev/instructions/fastslack/mtw-e2e-runner/claude-md"><img src="https://agentmods.dev/badge/instructions/fastslack/mtw-e2e-runner/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/fastslack/mtw-e2e-runner/claude-md"><img src="https://agentmods.dev/badge/instructions/fastslack/mtw-e2e-runner/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 | $0.02828 | $0.02828 |
| Opus 5.5 | $0.01131 | $0.01131 |
| Sonnet 5.5 | $0.00566 | $0.00566 |
| Haiku 4.5 | $0.00283 | $0.00283 |
Grade A, and why
mtw-e2e-runner 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 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 — 153 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
@matware/e2e-runner is a JSON-driven E2E test runner that executes browser tests in parallel against a configurable browser pool via Puppeteer. Tests are defined as JSON files containing sequential action arrays — no JavaScript test files.
- Runtime: Node.js >= 20, ESM (
"type": "module") - Dependencies:
puppeteer-core(connects to remote browser),@modelcontextprotocol/sdk(MCP server),better-sqlite3(dashboard DB) - Infrastructure: Multi-driver pool —
browserless, genericcdp,lightpanda(Zig),obscura(Rust+V8), orsteel. Defaultautoprobes endpoints and picks per pool.pool startuses Docker Compose for browserless/lightpanda; Obscura ships as a single binary the user runs locally.
Commands
# Install dependencies
npm install
# Scaffold e2e/ directory in a consuming project
npx e2e-runner init
# Manage Chrome pool (requires Docker) — CLI only, NOT available via MCP
npx e2e-runner pool start # spins up browserless/chrome container
npx e2e-runner pool stop
npx e2e-runner pool status # also available as e2e_pool_status MCP tool
# Run tests
npx e2e-runner run --all # all suites in e2e/tests/
npx e2e-runner run --suite <name> # single suite (matches with or without numeric prefix)
npx e2e-runner run --tests <file.json> # specific JSON file
npx e2e-runner run --inline '<json>' # inline JSON array
# Force a driver for the whole run (overrides per-test `driver` fields)
npx e2e-runner run --all --driver obscura
npx e2e-runner run --all --driver obscura --fallback-driver cdp
# List available suites
npx e2e-runner list
# Capture a screenshot of any URL (no test required)
npx e2e-runner capture <url>
npx e2e-runner capture <url> --full-page --selector ".loaded" --delay 2000 --filename my-capture.png
# Web dashboard
npx e2e-runner dashboard [--port 8484]
# Issue-to-test
npx e2e-runner issue <url> # fetch and display
npx e2e-runner issue <url> --generate # generate test via Claude API
npx e2e-runner issue <url> --verify # generate + run + report
npx e2e-runner issue <url> --prompt # output AI prompt as JSON
npx e2e-runner issue <url> --test-type api # generate API tests instead of UI tests
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 First seen · 153 lines · 2,828 tokens per session scan A 93550eebf878
mtw-e2e-runner CLAUDE.md is an instructions file published in the GitHub repository fastslack/mtw-e2e-runner (7 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 2,828 tokens to every session, about $0.0113 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.
vscode oss-third-party-notices.instructions.md
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).
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 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).
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.