Show HN: Run Claude Code unattended inside a fence, under a dollar budget

Category: devtools

Tags: sandbox, budgeting, ai-agents, cli, macos

Score: 6.8/10 (Innovation: 7, Technical: 8, Documentation: 7, Utility: 5)

SIwithin is a Python tool that runs AI agent CLIs (Claude Code and OpenAI Codex) unattended within a macOS sandbox and strict dollar budget. It enforces folder isolation via sandbox-exec, meters API requests through a local proxy, and logs every run, offering a novel approach to safe, cost-controlled agent execution.

Target audience: AI developers, DevOps engineers, security-conscious teams automating agent runs

Repository: https://github.com/metahumansworld/SIwithin · Python · Apache-2.0 · 3 stars

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