What is conch-runtime?

Conch-runtime is a building block for developers who want to run shell scripts from within their own applications. Instead of relying on the operating system's built-in shell (like bash or sh), a developer can use this library to parse and execute shell commands directly. This is useful if you are building a custom terminal, a scripting tool, or any application that needs to understand and run shell-style commands without depending on what's already installed on the user's machine. At a high level, the library takes already-parsed shell commands and executes them. Think of it as the engine that actually does the work after a separate tool has broken down the text into structured instructions. It supports many familiar shell features like conditionals (running a command only if a previous one succeeded), pipelines (chaining commands together), loops, and variable substitutions. Notably, it is designed to work cross-platform, meaning it can run on both Unix-like systems and Windows, which is unusual for shell tools. The primary audience is other developers building tools that need to understand shell scripting. For example, if you are creating a new terminal emulator or a CI/CD tool that processes shell commands, this library gives you a foundation to execute those commands without starting from scratch. It is not a complete, ready-to-use shell on its own. The project explicitly states it aims to be a stepping stone toward building a full shell, rather than being one. The project is written in Rust, a language known for performance and safety. It intentionally avoids aiming for perfect compliance with the POSIX standard, instead focusing on common, widely used features. Some capabilities like background jobs, glob expansion, and signal handling are not yet supported, and the README does not go into detail on the timeline for those. The tradeoff is flexibility and cross-platform support over being a drop-in replacement for existing shells.