Changelog – Version 4.2.1
This patch release fixes edge cases in tab-completion behavior for hierarchical commands registered via CommandTree.
It ensures suggestions are accurate and context-aware based on cursor position and partially typed input.

Bug Fixes
Improved Tab-Completion Suggestions

• Fixed incorrect suggestions when the cursor is placed immediately after a valid argument without a trailing space (e.g. /test sub<CURSOR>):
  
  • Suggestions now differentiate between:
    
    • Cursor at end of argument ➜ sibling and matching suggestions.
    • Cursor after space ➜ child/subcommand suggestions.
• Handled partial alias paths consistently:
  
  • Suggestions work correctly for commands registered under aliases (e.g. "parent.child") and their subcommands.

Internal Improvements

• Refactored fallback suggestion logic in CommandInvoker#suggest(...):
  • Clean separation of "argument-in-progress" vs "ready for next argument" cases.

Migration Notes
This is a non-breaking patch release:

• No API changes.
• No migration required.

Full Changelog: 4.2.0...4.2.1