Argument Parser

Definitions

1. A library or component that interprets command-line flags, positional parameters, defaults, and validation rules for a program. Argument parsers make CLI tools more reliable by handling help text, type conversion, and error reporting consistently.

   In plain English: A component that reads and interprets command-line options for a program.

   Example: "They replaced the hand-rolled flag logic with an argument parser so subcommands and validation errors behaved predictably."

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