Yosh

Yosh is a shell environment that integrates large language model (LLM) capabilities directly into Bash, allowing users to interact with their terminal using natural language. By typing 'yo' followed by a request, users can have the LLM generate appropriate shell commands, which are then placed at the prompt for review or editing. This approach keeps users in control, as commands are not auto-executed and can be edited or canceled before running.

The tool maintains session memory, enabling it to understand follow-up instructions and retain conversational context across multiple interactions. Yosh is also terminal-aware, capturing scrollback through a PTY proxy so that the LLM can access the same terminal output visible to the user. For tasks requiring a sequence of commands, Yosh handles multi-step workflows automatically, using continuation to generate and suggest the necessary steps.

Yosh is designed to be memory-safe, with its stack—including bash, readline, curl, openssl, zlib, and libc—compiled using Fil-C. It is POSIX-compliant and fully compatible with existing Bash scripts, aliases, and configuration files, ensuring that established workflows and customizations continue to function as expected. The LLM component is only activated when the user explicitly invokes it by typing 'yo', preserving the standard Bash experience otherwise.

Distribution is provided as a Fil-C static binary for Linux/x86_64 platforms, and the source code is available on GitHub. The LLM integration can utilize models from Anthropic or OpenAI, as specified in the tool's documentation. Yosh is positioned as a shell tool for those seeking to enhance command-line productivity with natural language interaction while maintaining compatibility and user control.