Installation

Install the Extension

1. Open VSCode
2. Go to Extensions (Cmd+Shift+X on macOS / Ctrl+Shift+X on Windows/Linux)
3. Search for "Atscript"
4. Install the extension by Moost

Alternatively, install from the VS Marketplace or via the command line:

code --install-extension moost.atscript-as

Project Setup

Syntax highlighting works immediately after installation — no additional setup needed.

For LSP features (IntelliSense, diagnostics, go-to-definition, hover, rename, etc.), the extension requires @atscript/core to be installed in your project root:

npm install @atscript/core

TIP

If @atscript/core is not found when the extension activates, it will show a warning and automatically retry every 60 seconds. Once you install the dependency, the language server will start on the next retry — no manual reload required.

You can also trigger an immediate restart via the Command Palette (Cmd+Shift+P / Ctrl+Shift+P) → "Atscript: Restart Language Server".

What Works Without @atscript/core

Feature	Without @atscript/core	With @atscript/core
Syntax highlighting	Yes	Yes
File nesting (.as.d.ts under .as)	Yes	Yes
IntelliSense / completions	No	Yes
Diagnostics	No	Yes
Go to Definition	No	Yes
Find References	No	Yes
Rename Symbol	No	Yes
Hover information	No	Yes
Signature help	No	Yes
Auto .d.ts generation	No	Yes
Config watching	No	Yes