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creating-julia-app

Use when you create a CLI written in Julia packages or MCP servers

plugins/AtelierArith/atelier-arith-julia-development-skills/skills/creating-julia-app/SKILL.md

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# Creating a Julia app

Apps are Julia packages that are intended to be run as "standalone programs" (by e.g. typing the name of the app in the terminal possibly together with some arguments or flags/options). This is in contrast to most Julia packages that are used as "libraries" and are loaded by other files or in the Julia REPL.

A Julia app is structured similar to a standard Julia library with the following additions:

A `@main` entry point in the package module (see the Julia help on `@main` for details)
An `[apps]` section in the `Project.toml` file listing the executable names that the package provides.
A very simple example of an app that prints the reversed input arguments would be:

```julia
# src/MyReverseApp.jl
module MyReverseApp