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nextflow/docs/developer/nextflow.cli.md

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+
+# `nextflow.cli`
+
+The `nextflow.cli` package implements the command line interface.
+
+## Class Diagram
+
+```{mermaid} diagrams/nextflow.cli.mmd
+```
+
+```{note}
+Some classes may be excluded from the above diagram for brevity.
+```
+
+## Notes
+
+The `Launcher` class is the entrypoint for Nextflow. It uses [JCommander](https://jcommander.org/) to parse the command-line arguments. Additionally, there is a class for each subcommand which implements the application logic of that command. By far the most complex command is `CmdRun`.