CLI Rationalization: Implement subcommand structure with clap v4 #212
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Replace structopt with modern clap v4 derive API and introduce a clean subcommand-based CLI architecture. Key changes: - Migrate from structopt to clap v4 with derive features - Implement subcommand structure (run, test, dump, version, explain, list-targets) - Add smart default subcommand behavior (defaults to 'run' when no subcommand specified) - Maintain backward compatibility with existing command patterns - Update documentation to reflect new CLI structure - Remove all structopt dependencies across codebase The new CLI provides better user experience while preserving all existing functionality. All previous command patterns continue to work unchanged. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <[email protected]>
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Summary
Test plan
eu --help🤖 Generated with Claude Code