This is a fairly large update, with some new features and optimizations.

There are a few breaking changes, which are unlikely to impact many apps. Unless you have build custom line-API widgets. See below for the details.

You may have to regenerate your snapshot tests, mostly as a result of the optimizations. I wouldn't expect the changes result in any material changes.

Thanks to all contributors!

[6.0.0] - 2025-08-31

Fixed

• Fix type hint for SelectType: only hashable types are allowed. https://github.com/Textualize/textual/pull/6034
• Fixed Content.expand_tabs https://github.com/Textualize/textual/pull/6038
• Fixed return value for Pilot.double_click and Pilot.triple_click https://github.com/Textualize/textual/pull/6035
• Fixed sizing issue with Pretty widget https://github.com/Textualize/textual/pull/6040 https://github.com/Textualize/textual/pull/6041
• Fixed garbled inline app output when inline_no_clear=True https://github.com/Textualize/textual/pull/6080

Added

• Added bar_renderable to ProgressBar widget https://github.com/Textualize/textual/pull/5963
• Added OptionList.set_options https://github.com/Textualize/textual/pull/6048
• Added TextArea.suggestion https://github.com/Textualize/textual/pull/6048
• Added TextArea.placeholder https://github.com/Textualize/textual/pull/6048
• Added Header.format_title and App.format_title for easier customization of title in the Header https://github.com/Textualize/textual/pull/6051
• Added Widget.get_line_filters and App.get_line_filters https://github.com/Textualize/textual/pull/6057
• Added Binding.Group https://github.com/Textualize/textual/pull/6070
• Added DOMNode.displayed_children https://github.com/Textualize/textual/pull/6070
• Added TextArea.hide_suggestion_on_blur boolean https://github.com/Textualize/textual/pull/6070
• Added OptionList.highlighted_option property https://github.com/Textualize/textual/pull/6090
• Added TextArea.update_suggestion method https://github.com/Textualize/textual/pull/6090
• Added textual.getters.app https://github.com/Textualize/textual/pull/6089

Changed

• Breaking change: The renderable property on the Static widget has been changed to content. https://github.com/Textualize/textual/pull/6041
• Breaking change: HeaderTitle widget is now a static, with no text and sub_text reactives https://github.com/Textualize/textual/pull/6051
• Breaking change: Renamed Label constructor argument renderable to content for consistency https://github.com/Textualize/textual/pull/6045
• Breaking change: Optimization to line API to avoid applying background styles to widget content. In practice this means that you can no longer rely on blank Segments automatically getting the background color.