The request names sebastian/cli-parser, which is not among the candidate products, so the closest matches are tools for parsing command-line interfaces. Docopt describes a CLI from a help-message-style specification 1, and pest and ANTLR are general parser generators 310 rather than CLI-specific tools.

A question back: Do you mean the GitHub repository sebastian/cli-parser, or a library for parsing command-line arguments in a specific language (for example Python or Rust)?

1. 1

   Docoptdocopt.orgverified and signed

   Docopt is a language for formally describing a command-line interface from a help message, which parsing libraries then use to read arguments 111.

   Website

   for agents: optparse · argparse · parsing

2. 2

   pest. The Elegant Parserpest.rswebsite read, tools not yet checked

   pest is a general-purpose PEG parser generator written in Rust that can be used to build a parser for command-line syntax 3.

   Website

   +2 community tools built for it

3. 3

   ANTLRantlr.orgverified and signed

   ANTLR is a parser generator that builds parsers from grammars for reading structured text, which could be used to define a command-line grammar 1020.

   WebsiteDocsGet started

   for agents: parsing · antlr · antlr3