mise (mise-en-place) is a unified CLI tool designed to simplify and manage local development environments. It acts as a polyglot tool version manager, installing and seamlessly switching between versions of various development tools (replacing utilities like asdf, nvm, and pyenv). Additionally, it functions as an environment variable manager that dynamically loads project-specific env vars based on your current directory (replacing direnv), and serves as a built-in task runner to define and execute project workflows as a modern alternative to make or npm scripts.