Mesh Language

Language support for Mesh -- an expressive, readable programming language with built-in concurrency via actors and supervision trees.

Features

• Syntax Highlighting -- comprehensive TextMate grammar with scoping for keywords, types, literals, comments, and module-qualified calls
• Language Configuration -- bracket matching, auto-closing pairs, and Mesh-specific indentation for do/end blocks
• Verified LSP Diagnostics -- real-time parse and type errors from the Mesh compiler
• Verified Hover -- inferred type information on hover
• Verified Go to Definition -- jump to definitions across files
• Verified Document Formatting -- format the current Mesh document through meshc lsp
• Verified Signature Help -- parameter hints with active-parameter tracking for function calls

The current transport-level regression suite exercises the LSP path over real stdio JSON-RPC against reference-backend/, so the documented editor experience is tied to the same backend-shaped proof as the CLI tooling.

Installation

Install Mesh first with the verified public installer pair https://meshlang.dev/install.sh and https://meshlang.dev/install.ps1. The public installers place both meshc and meshpkg on your PATH; the extension itself uses meshc lsp.

macOS and Linux:

curl -sSf https://meshlang.dev/install.sh | sh

Windows x86_64 (PowerShell):

irm https://meshlang.dev/install.ps1 | iex

Verify the installed binaries:

meshc --version
meshpkg --version

For the named backend proof behind this public install contract, see Production Backend Proof and reference-backend/README.md.

Then build the current packaged extension from source:

npm install
npm run compile
npm run package

The package step writes the current versioned artifact to dist/mesh-lang-<version>.vsix. To install that freshly built artifact into VS Code, run:

npm run install-local

Requirements

The Mesh compiler (meshc) must be installed and available in your PATH. The verified public installers at https://meshlang.dev/install.sh and https://meshlang.dev/install.ps1 install both meshc and meshpkg; this extension connects to the built-in language server provided by meshc.

Extension Settings

Release Notes

See CHANGELOG.md for a detailed list of changes in each release.