vercel-labs/just-bash

just-bash is a TypeScript-based simulated bash environment with an in-memory virtual filesystem, designed specifically for AI agents that need a secure, sandboxed shell. It provides a safe alternative to running real bash commands, supporting common Unix utilities like `ls`, `grep`, `cat`, and `curl` (with network access disabled by default), while preventing access to the real filesystem or system binaries. The project is ideal for AI agents that need to execute shell commands in a controlled environment without the security risks of a full bash shell.