metahumansworld 在开源社区发布了 SIwithin 0.5.0 项目，这是一个允许在受限沙箱环境中无人值守运行 Claude Code 和 OpenAI Codex CLI 工具的系统1。该项目通过文件夹隔离、预算上限、进程管理和代理拦截等机制实现安全性和成本控制，做出了三个核心承诺：每次运行仅接触指定文件夹、支出不超过用户设定预算、每次执行留下一条完整记录1。
SIwithin 0.5.0 于 2026 年 10 月 19 日发布，目前仅支持 macOS 平台，在 Linux 和 Windows 上会拒绝运行1。该工具基于 Python 3.10 或更新版本开发，仅使用标准库，不发送遥测数据1。项目已通过烟雾测试验证，共完成 291 项检查，同时进行的 24 次实时测试总成本为 $0.07701。此外，工具提供了 --reconcile 功能，用于对比云服务提供商的使用报告与项目账本，代理池在回环端口监听，每次运行生成新 token 以替代原始 API 密钥1。
A new open-source project called SIwithin has been released to enable unattended execution of Claude Code and OpenAI Codex CLI tools within confined sandbox environments 1. The tool enforces three core guarantees: code runs only within designated folders, spending remains below a preset budget threshold, and each execution generates a detailed record 1.
SIwithin version 0.5.0 launched on October 19, 2026, with security and cost control mechanisms including directory isolation, budget caps, process management, and proxy interception 1. The project is currently limited to macOS platforms and will refuse to run on Linux and Windows systems 1. It requires Python 3.10 or later and relies exclusively on standard library dependencies, with no telemetry data transmission 1.
The project has undergone smoke testing with 291 checks passed and real-time validation across 24 runs, accumulating total costs of $0.0770 1. A proxy pool operates on loopback ports, generating new tokens for each run to replace direct API keys 1. The tool additionally supports a reconciliation feature that compares provider usage reports against its internal ledger 1.
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