Equis for Visual Studio Code

Rich language support for the Equis programming language.

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The official Visual Studio Code extension for the Equis programming language — a systems language for building verifiable accounting systems with compile-time REA (Resource-Event-Agent) enforcement.

✨ Features

Syntax Highlighting

Full TextMate grammar with semantic scopes for:

• REA Constructs — Agent, Resource, Event, Commitment, Policy, Valuator, exchange, transformation
• Flow Keywords — flow, logic, in, out, from, to, execute, reverse, fulfills, evaluated_by, roles
• Control Flow — if, else, while, for, return, break, continue
• Storage & Declarations — fn, let, mut, struct, extern, interface, implements
• Type Annotations — i64, f64, bool, ptr, string
• Literals — integers, floats, strings with escape sequences
• Operators — arithmetic, comparison, logical, assignment

Language Server Protocol (LSP)

Built-in LSP client that automatically connects to eq lsp for:

• Go-to-definition
• Hover documentation
• Diagnostics

File Icons

Custom .equis file icons via the bundled icon theme.

Marketplace

Equis on VS Code Marketplace

📦 Installation

Quick Open

Launch VS Code Quick Open (Ctrl+P), paste the following command, and press enter:

ext install equis-lang.vscode-equis-lang

From VSIX (Local)

code --install-extension vscode-equis-0.1.0.vsix

From Source

git clone https://github.com/equis-lang/vscode-equis.git
cd vscode-equis
npm install && npm run compile

Then press F5 in VS Code to launch the Extension Development Host.

⚙️ Configuration

Setting	Type	Default	Description
equis.executablePath	string	""	Absolute path to the eq executable. Leave empty to auto-detect from ~/.equis/bin/ or PATH.

Project Structure

vscode-equis/
├── src/
│   └── extension.ts              # LSP client & extension activation
├── dist/
│   ├── extension.js              # Compiled extension bundle
│   └── extension.js.map
├── .github/
│   ├── workflows/
│   │   └── ci.yml                # CI pipeline
│   ├── ISSUE_TEMPLATE/
│   │   ├── bug_report.md
│   │   └── feature_request.md
│   └── PULL_REQUEST_TEMPLATE.md
├── equis.tmLanguage.json         # TextMate syntax highlighting grammar
├── language-configuration.json   # Bracket matching, comments, auto-close
├── equis-icons.json              # File icon theme for .equis files
├── package.json                  # Extension manifest & contribution points
├── tsconfig.json                 # TypeScript configuration
├── logo.png
├── logo.svg
├── CODE_OF_CONDUCT.md
├── CONTRIBUTING.md
├── SECURITY.md
├── LICENSE                       # Apache 2.0
└── README.md

🔗 Related

• Equis Language — Compiler, runtime, and standard library
• Language Specification
• Standard Library Reference

License

Copyright (c) 2026 mlintangmz
Licensed under the Apache License 2.0.