Explain Gum behavior mapping to DefaultFromFileXxxRuntime Forms controls.
npx skills add https://github.com/vchelaru/Gum --skill gum-forms-behaviors
Please help me install this Agent Skill. Skill: gum-forms-behaviors Source: https://github.com/vchelaru/Gum/tree/main/.claude/skills/gum-forms-behaviors Command: npx skills add https://github.com/vchelaru/Gum --skill gum-forms-behaviors
Gum's visual save model and the Forms behavioral layer are disconnected, which forces developers to set interaction and data defaults in code after project load. This Skill explains how behaviors declared in .behx/BehaviorSave files and ElementSave behavior references are mapped at load time to DefaultFromFileXxxRuntime types that instantiate Forms controls, and why many Forms properties cannot be set from the Gum editor.
Ask the AI to summarize how a specific component's Behaviors list maps to DefaultFromFileXxxRuntime classes and which Forms properties cannot be authored in the Gum editor.
High-intent search queries and answers about installing and using this skill.
Gum maps visual components to Forms controls by matching behavior names in ElementBehaviorReference lists to DefaultFromFileXxxRuntime types during the FormsUtilities.RegisterFromFileFormRuntimeDefaults lifecycle. The AfterFullCreation pairing phase then initializes interactive defaults.
Interactive properties are missing because of a property promotion gap where common Forms properties like Button.Text or CheckBox.IsChecked have no VariableSave equivalent in the Gum visual editor. You must set these behavioral defaults in code after project load.
Debug DefaultFromFile runtime type selection by inspecting BehaviorSave files and StandardFormsBehaviorNames constants to verify the exact behavior name mapping. Compare these names against the ElementBehaviorReference list to identify mismatches causing incorrect Forms control instantiation.
You cannot set many Forms control defaults like Slider range, ItemsControl items, or TextBox.Text directly in the Gum editor. These properties lack a VariableSave equivalent and must be configured programmatically via DefaultFromFileXxxRuntime classes after the visual loads.
The FormsUtilities.RegisterFromFileFormRuntimeDefaults lifecycle is the loading process that pairs design-time Gum visuals with runtime Forms controls. It triggers the AfterFullCreation method and ReactToVisualChanged event flow to synchronize visual states with interactive behaviors.
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