Arc Language — VS Code Extension

Syntax highlighting and language server support for the Arc programming language.

Features

• Syntax Highlighting — Keywords, strings with interpolation, numbers, comments, operators, tool calls, pipe operator
• Diagnostics — Parse errors and semantic warnings shown inline
• Hover — Type information on hover
• Go to Definition — Jump to function/variable definitions
• Completion — Keywords, in-scope variables, stdlib functions
• Document Symbols — Outline of functions, types, and variables

Installation

From VS Code Marketplace (recommended)

1. Open VS Code
2. Go to Extensions (Ctrl+Shift+X)
3. Search "Arc Language"
4. Click Install

For full IntelliSense (diagnostics, hover, completions), also install the Arc compiler:

npm install -g arc-lang

Syntax highlighting works without the compiler installed.

Development

1. Clone the arc-lang repo
2. Open editors/vscode in VS Code
3. npm install && npm run compile
4. Press F5 to launch Extension Development Host
5. Open any .arc file