V3 CLI Modernization

Use a modular command registry pattern where each command is a module under 500 lines with its own handler, middleware stack, and category. The registry resolves commands by exact match, alias, or fuzzy matching and executes them through a middleware pipeline.

Use inquirer for select, multiselect, input, and confirm prompts, dynamically imported for tree-shaking. Combine with cli-progress for progress bars during long-running tasks, and wrap everything in a prompt service for consistent UX.

Yes, hooks registered on command_start, command_end, and command_error events can record execution trajectories, calculate reward scores based on success and latency, and submit feedback to a learning service for future command suggestions.

This modernization targets under 200ms average command execution time. A performance monitor tracks execution time and memory per command, alerting when P95 latency exceeds 5 seconds.

Completion combines exact prefix matches from the command registry, learning-based suggestions from past executions, and context-aware suggestions such as detecting a git repository or package.json. Results are ranked by confidence and limited to the top 10.