Fix PHP 8.2+ “Creation of dynamic property is deprecated” notices by declaring the previously undeclared properties on Taxonomy_Single_Term ($namefield), Taxonomy_Single_Term_Walker ($hierarchical, $input_element), and Category_Metabox_Enhanced_Admin ($plugin_screen_hook_suffix). No behavior change.
0.9.1
Fix server-side single-term enforcement, which was registered against pre_set_object_terms — a hook that does not exist in WordPress core — and never executed in 0.9.0. The handler now hooks set_object_terms and re-issues wp_set_object_terms with a corrected list when the single-term contract is violated, so REST and programmatic callers are now actually enforced. The classic-editor metabox path was unaffected; it relies on UI-level enforcement.
Register script translations for the Block Editor sidebar panel so its strings can be loaded from language packs.
0.9.0
Add a “Force selection” per-taxonomy setting (defaults on) replacing the previously hardcoded classic-editor behavior. When on, the Block Editor sidebar suppresses “— Select —” once a term is chosen, and the server-side handler substitutes a default term for empty submissions on radio/select taxonomies — closing the bypass that REST and programmatic callers had on the single-term invariant. (The 0.9.0 release wired this handler against the wrong hook name; see 0.9.1.)
The substituted term resolves in this order: default_<taxonomy> option → default_term registered with the taxonomy (WP 5.5+) → first term by name asc. Filterable via of_cme_force_selection_default_term. Mirrors the classic library’s process_default() pattern.
0.8.0
Replace the legacy Block Editor integration with a native sidebar panel built on @wordpress/components (TreeSelect / radio tree) and PluginDocumentSettingPanel.
Add server-side single-term enforcement so REST and programmatic saves can’t bypass the radio/select invariant. (Released against the wrong hook name; superseded by 0.9.1.)
The classic-editor metabox path is unchanged; it now skips post types that use the Block Editor to avoid duplicate UI.
0.7.1
Update the Taxonomy_Single_Term library and some cosmetic fixes.
0.7.0
Support the single term UI in Gutenberg sidebar Categories/Taxonomies panels.
