Editor Extensions

Extensions are standard VL patches saved with a .HDE.vl suffix. They run automatically when open in the editor.

File Naming

Context	Required Name
Standalone extension	VL.MyExtension.HDE.vl
Extension-only NuGet	VL.MyExtension.HDE (package ID)
Mixed NuGet main doc	VL.MyPackage.vl
Mixed NuGet extension doc	VL.MyPackage.HDE.vl

Required NuGet References

• VL.HDE — provides Command node, window types, WindowFactory
• VL.Lang — provides API nodes under the Session category

Command Node

Registers a command in the editor menu:

Pin	Purpose
Label	Menu text
Visible	Show/hide the command
Shortcut	Keyboard binding
Output	Triggers (bang) on activation

Multiple Command nodes can live in one .HDE.vl document.

Warning: A runtime error in one command may affect all others in the same document.

Window Types

Type	Behavior
SkiaWindow	Slimmed-down Skia renderer window
SkiaWindowTopMost	Always-on-top, no focus steal

Docking

Wrap window with WindowFactory node. Connect WindowContext and Window pins.

Template: VL.HDE/Template.HDE.vl

API Access

Access hovered/selected nodes, read/write pins via VL.Lang Session category nodes. Browse available API in the HelpBrowser's API section.

Developer Shortcuts

• Shift+F9 — restarts all extensions simultaneously

Limitations

• Settings panel integration is not yet possible
• Extensions only run in the editor, not in exported applications