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Bx

Show HN: Bx – macOS native sandbox for AI and coding tools

45 AI Score
Show_hn other Added Apr 7, 2026

Details

Sector
other
Total Funding
$0
Last Round
$0

About

Wrapper around Apple&#x27;s macOS sandbox-exec tool, which usually sandboxes native apps. It is &quot;allow-first&quot; i.e. it will not overprotect everything, just crucial information and therefore allows most tools to run without issues. Limiting is done using a .gitignore like file schema. Further TOML config options available.<p>I built it because Docker sandboxing requires config and planning. Build in sandboxing of AI tools instead is limited to the very tools themselves, instead I wanted to have a simple cage around Claude running inside VSCode. Also needed to protect files inside a folder like .env.local or keys.<p>Install via: brew install holtwick&#x2F;tap&#x2F;bx<p>Run like: bx claude .

AI Score Reasoning

Bx is a timely developer utility addressing the security risks of AI agents, but it currently lacks the defensibility and traction required for a high venture-capital score. While the 'allow-first' approach solves a genuine friction point for developers, its reliance on macOS-specific native tools and its status as a lightweight wrapper limit its potential as a standalone platform.

Source

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