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cli: Instructions file for Claude Code

CLAUDE.md

cli CLAUDE.md is an instructions file for Claude Code from railwayapp/cli. It costs 279 tokens per session, scanned A, original, MIT.

Repository instructions for Railway's command-line tool, a program used to manage Railway projects from a terminal. They describe its Rust code layout, development commands, command routing, and login methods.

In plain words
What is it for?
Useful for changing commands, controllers, API queries, project settings, authentication, or multi-project handling, then formatting, linting, and testing the Rust code.
Why use it?
They give a coding agent the project-specific context needed to make changes without guessing where code belongs or how to check it.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions Claude Code.

This is railwayapp/cli's own configuration. It tells Claude Code how to work on cli itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything cli configures →

not rated 629repo +1 yesterday A scan 279 tokens original MIT
View source ↗ railwayapp/cli railway.com
Reuse

Borrowing it

Nothing to install: this file belongs to railwayapp/cli. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/railwayapp/cli/master/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/railwayapp/cli

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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Your own site
<a href="https://agentmods.dev/instructions/railwayapp/cli/claude-md"><img src="https://agentmods.dev/badge/instructions/railwayapp/cli/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.

agentmods 80×15 button for cli CLAUDE.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/railwayapp/cli/claude-md"><img src="https://agentmods.dev/badge/instructions/railwayapp/cli/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 279 This file is loaded in full into every session.
When invoked 279 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00279 $0.00279
Opus 5.5 $0.00112 $0.00112
Sonnet 5.5 $0.00056 $0.00056
Haiku 4.5 $0.00028 $0.00028

Measured 2mo ago against content hash b0c709cf6189, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

cli 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.

CLAUDE.md · 28 lines

What it actually says

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Development Commands

  • cargo run -- <args> - Run CLI during development
  • cargo test - Run tests
  • cargo lint-fix - Fix linting issues automatically (run after making changes)
  • cargo fmt - Format code (run after making changes)
  • cargo clippy - Check for linting issues
  • nix-shell - Enter dev environment with dependencies

Architecture

  • Commands: src/commands/ - CLI commands using clap derives, each with exec() function
  • Controllers: src/controllers/ - Business logic for Railway entities (project, service, deployment)
  • GraphQL: src/gql/ - Generated type-safe queries/mutations for Railway API
  • Config: src/config.rs - Authentication and project settings
  • Workspace: src/workspace.rs - Multi-project context handling

Command System

Commands use a macro system in main.rs. The commands! macro generates routing for modules in src/commands/.

Authentication

  • Project tokens via RAILWAY_TOKEN environment variable
  • User tokens via OAuth flow stored in config directory
Changes

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.

  1. 2mo ago First seen · 28 lines · 279 tokens per session scan A b0c709cf6189

Subscribe to this mod's changes

cli CLAUDE.md is an instructions file published in the GitHub repository railwayapp/cli (629 stars, last pushed yesterday), licensed MIT. It adds 279 tokens to every session, about $0.0011 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.

cliinfrastructurerailway
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