UI Panels

Trigger

Use this skill when the user:

• Wants a sidebar tab in the 3D viewport, properties editor, or any other space
• Mentions bpy.types.Panel, bl_space_type, bl_region_type, "N panel", "sidebar"
• Needs to expose properties or operators in a custom UI
• Asks why a property is showing without a label or in the wrong column

Required inputs

• Where the panel lives: the editor (3D viewport, Properties, etc.) and the region (sidebar, header, tools)
• Tab name if it lives in a sidebar (bl_category)
• Class name convention: EDITOR_PT_name (VIEW3D_PT_my_addon)

The minimum viable panel