# 🐪 caml > Build CLI apps with YAML `caml` allows you to build command line applications using declarative yaml. `caml` aims to be like `make`, but by using descriptive, declarative yaml. ## Usage Running the command without any arguments displays the commands defined in the `caml.yaml` file: ```sh bin/caml ``` ## Declaring commands `caml` reads a file called `caml.yaml` in the current directory and converts those commands into a unified CLI command. The basic structure is to have a `command`, which has a `desc` and an `execute` for the bash command to execute. ```yaml command: desc: Command description execute: script.sh ``` This yaml will create the following command: ```yaml bin/caml command # Command description ``` And it will run any bash command defined. Arguments may be added under `args` in a nested fashion as displayed below. ```yaml command: args: one: desc: First argument type: string two: desc: Second argument type: string ``` ## Examples ```yaml build: desc: Build our project execute: make clean: desc: Clean our project execute: make clean ``` ```yaml build: desc: Bundle execute: bundle install migrate: desc: Migrate the test database execute: rails db:migrate RAILS_ENV=test test: desc: Run tests execute: rspec ```