What is code-box CLAUDE.md?

Repository instructions for Code Box, a Docker-based environment that packages several AI coding tools. Docker is software for building and running applications in isolated containers.

Use it to understand the auto-update system, supported tool versions, Renovate settings, Docker image builds, and GitHub Actions deployment.

It documents how dependency updates flow from package changes through automated checks and image publishing, so maintainers know which files control updates and releases.

How nezhazheng/code-box configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to nezhazheng/code-box. 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/nezhazheng/code-box/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/nezhazheng/code-box

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/nezhazheng/code-box/claude-md/github.svg)](https://agentmods.dev/instructions/nezhazheng/code-box/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/nezhazheng/code-box/claude-md"><img src="https://agentmods.dev/badge/instructions/nezhazheng/code-box/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/nezhazheng/code-box/claude-md"><img src="https://agentmods.dev/badge/instructions/nezhazheng/code-box/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 2,111 This file is loaded in full into every session.

When invoked 2,111 The same file — it is already loaded in full.

Security scan D 3 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.

Model	Per session	Once invoked
Fable 5.1	$0.02111	$0.02111
Opus 5.5	$0.00844	$0.00844
Sonnet 5.5	$0.00422	$0.00422
Haiku 4.5	$0.00211	$0.00211

Measured 2mo ago against content hash d1ebef0e380b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade D, and why

code-box CLAUDE.md scanned grade D with 3 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

- Has passwordless sudo access

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -fsSL https://raw.githubusercontent.com/nezhazheng/code-box/main/install.sh | bash

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -fsSL https://raw.githubusercontent.com/nezhazheng/code-box/main/install.sh | bash

CLAUDE.md · 279 lines

How it starts

The opening of the file, as written. The whole thing — 279 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

Code Box is a Docker-based sandbox environment for AI coding tools (Claude Code, Codex, Gemini CLI, OpenCode, etc.). The project uses automated dependency updates via Renovate and CI/CD via GitHub Actions to keep vibe coding tools up-to-date.

Auto-Update Architecture

This project maintains a "downstream distribution" model:

npm releases new tool version
    ↓
Renovate detects update (checks hourly)
    ↓
Auto-creates PR updating package.json
    ↓
Auto-merges PR (if CI passes)
    ↓
GitHub Actions builds Docker image
    ↓
Pushes to Docker Hub (nezhazheng/code-box:latest)
    ↓
Users get latest tools on next `docker pull`

Key Files for Auto-Update System

package.json: Single source of truth for tool versions. Renovate monitors only these 5 packages:
- @anthropic-ai/claude-code
- @openai/codex
- @google/gemini-cli
- opencode-ai
- oh-my-opencode
renovate.json: Configured to ONLY update npm dependencies in package.json. Dockerfile and GitHub Actions updates are explicitly disabled to avoid infrastructure drift.
.github/workflows/docker-publish.yml: Triggers on changes to:
- package.json (tool version updates)
- Dockerfile
- entrypoint.sh
- smoke-test.sh
- The workflow file itself
Does NOT trigger on README.md, run-*.sh, or other files.

Dockerfile: Uses jq to parse package.json and install tools dynamically:

COPY package.json /tmp/package.json
RUN TOOLS=$(cat /tmp/package.json | jq -r '.dependencies | to_entries | map("\(.key)@\(.value)") | join(" ")') \
    && npm install -g $TOOLS

Installation and Usage

One-Line Install

curl -fsSL https://raw.githubusercontent.com/nezhazheng/code-box/main/install.sh | bash

Usage

code-box              # Start container for current directory
code-box --list       # List all projects and their ports
code-box --stop       # Stop container
code-box --remove     # Remove container
code-box --pull       # Pull latest image
code-box --clean      # Clean up all stopped containers

Read the full file on GitHub · 279 lines

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.

2mo ago First seen · 279 lines · 2,111 tokens per session scan D d1ebef0e380b

Subscribe to this mod's changes

code-box CLAUDE.md is an instructions file published in the GitHub repository nezhazheng/code-box (11 stars, last pushed 6d ago), licensed MIT. It adds 2,111 tokens to every session, about $0.0084 per session on Opus 5.5. A static security scan graded it D with 3 findings (asks for root, downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Containers DevOps and cloud agent sandbox vibe-coding

code-box CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
code-box CLAUDE.mdnezhazheng/code-box	Instructions file	11	6d ago	MIT	D	2,111	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

code-box: Instructions file for Claude Code