SCS Intellisense provides semantic highlighting for SCS Software data files (.sii, .sui). It improves readability and speeds up editing by offering:
Semantic token coloring for MagicMark, Classes, Attributes (Key and Values), strings, numbers, booleans and comments;
Auto-Close brackets;
Sii Extructure
The structure is built as originally described in the documentation.
SiiNunit - The magic marker that identifies a plain-text .sii file. It appears at the top of the file and marks the file as a serialized unit file.
class_name - The unit type of class being defined; it indicates the schema or category of the unit (for example prefab_model, model_def). It appears before the colon in the unit header.
unit_name - The unique name of the unit: a sequence of tokens separated by dots (e.g., mod.namespace.item). Use unique names per mod to avoid collisions. Anonymous units may use a leading dot.
attribute - The property name inside a unit block; an attribute is a key + value pair that holds the unit data.
key - The attribute name that identifies the property (e.g. name in name: "Truck").
value - The attribute value. Value can be strings, numbers, booleans, unit references, vectors (tuples), or other engine-specific formats. Use quotes for strings and parentheses for vectors.
Features
Semantic highlighting for .sii and .sui files
@include directive: recognized as a special key (no :)
Comment support: //, # and /* ... */
Auto-close brackets for {}, (), []
Tested themes
Dark
Dark 2026 (VSCode)
Catppuccin Frappé
Catppuccin Macchiato
Catppuccin Mocha (developed theme)
Dracula Theme & Dracula Theme Soft
Abyss
Dark Modern
Dark+
Light
Catppuccin Latte
Should work with the light variants of the themes listed above.
Note: Dark (Visual Studio) and Light (Visual Studio) do not provide highlighting in all scopes.
