4.0.0-b5 (2026-04-23)

What's Changed

Same as 4.0.0b4 other than:

• Made CompletionItem deepcopy-safe. by @kmvanbrunt in #1642
• Made more of the subcommand management API public. by @kmvanbrunt in #1643
• • CompletionItems as argparse choices example by @kmvanbrunt in #1644
• Raise ValueError in attach_subcommand() when the subcommand already exists. by @kmvanbrunt in #1645
• Made traceback settings customizable. by @kmvanbrunt in #1648
• Removed RichPrintKwargs TypedDict in favor of using Mapping[str, Any], allowing for greater flexibility in passing keyword arguments to console.print() calls.

Full Changelog: 4.0.0-b4...4.0.0-b5