Zerolang Language Support

VS Code support for Vercel Labs Zero (.0 files and zero.json manifests).

Features

• TextMate syntax highlighting for Zero declarations, control flow, literals, primitive types, borrows, std.* modules, and diagnostics-style identifiers.
• Snippets for main, functions, shapes, choices, enums, matches, tests, loops, std.fs, std.mem, and package scaffolding.
• Hover documentation for Zero keywords, primitive types, World, Maybe, ownership and borrow forms, and documented standard library helpers.
• IntelliSense for language keywords, primitive types, local symbols, use std.* imports, and current standard library helper names.
• Document symbols, workspace symbols, go-to definition, signature help, semantic tokens, and rename support.
• Diagnostics from zero check --json, including stable diagnostic codes, expected/actual/help text, and related locations when emitted by the compiler.
• Formatting via zero fmt when the compiler is installed, with a conservative whitespace fallback.
• Refactoring actions for import organization, extracting a selected block into a function skeleton, common quick fixes, and fix-plan inspection through zero fix --plan --json.
• Commands for checking, running, explaining diagnostics, showing graph JSON, organizing imports, creating a CLI package, and showing compiler repair plans.
• JSON schema validation for zero.json.

Requirements

The extension works without the Zero compiler for local editor features. Install the compiler for diagnostics, formatting, graph data, run/check commands, and compiler-backed repair plans:

curl -fsSL https://zerolang.ai/install.sh | bash
export PATH="$HOME/.zero/bin:$PATH"
zero --version

Settings

• zero.compilerPath: path to the Zero compiler executable. Defaults to zero.
• zero.checkOnSave: run zero check --json on save.
• zero.checkOnType: run debounced diagnostics while editing.
• zero.diagnosticsDelayMs: check-on-type debounce.
• zero.formatWithCompiler: use zero fmt for formatting.
• zero.target: optional target, for example linux-musl-x64.
• zero.emitKind: optional emit kind, exe or obj.

Development

npm install
npm run compile
npm test
npm run package

Open this folder in VS Code and press F5 to launch an Extension Development Host.

Source Notes

This project models the current Zero language, CLI, diagnostics, package, and standard library contracts from:

• https://zerolang.ai/getting-started
• https://zerolang.ai/reference
• https://zerolang.ai/cli
• https://zerolang.ai/diagnostics
• https://zerolang.ai/standard-library