This companion extension adds editor support to projects that use
typescript-to-gml:
TS2GML compiler diagnostics appear while editing TypeScript.
A complete project check runs after a TypeScript file is saved and is also available as TypeScript to GML: Check Project.
GameMaker built-ins from the project's generated runtime declarations link to their exact pages in the official GameMaker manual without adding visible underlines. Middle-click a built-in to open its topic, or use TypeScript to GML: Open GameMaker Manual for Symbol.
The extension activates only for TypeScript files beneath a directory containing one GameMaker .yyp project. Run the CLI's init command first so the project-local runtime declarations exist.
Project checks require Node.js 22+ and TypeScript 5.9.x installed in the game (npm install --save-dev typescript@5.9) or globally (npm install --global typescript@5.9). The editor's built-in TypeScript language service is separate from the CLI's library installation.
The extension uses the official manual's published topic index. The Monthly channel is used by default; set typescriptToGml.manualChannel to lts for an LTS project.
