Editors

VSCode

LikeC4 has official extension for VSCode - open-source and available on GitHub.
The extension provides:

• Validation and error reporting
• Semantic syntax highlighting
• Live Previews (and editing)
• Code completion and navigation
• Resolve references (like find all references, go to definition .. )
• “Safe” renames
• Hover information
• MCP Server

Extension is universal and can run in the browser.

Try example-cloud-system with:

github.dev Open example project in the browser using github.dev

vscode.dev Open example project in the browser using vscode.dev

Stackblitz Open example project in the browser using Stackblitz

Neovim

LikeC4 has a Neovim plugin for syntax highlighting and LSP integration with code navigation and completion.

The plugin supports:

• Auto start of the LikeC4 language server for files with .c4 extension
• Validation and error reporting
• Semantic syntax highlighting
• Code completion and navigation
• Resolve references (like find all references, go to definition .. )
• “Safe” renames (do not to forget to write your buffers)
• Hover information
• Live Previews (and editing)

likec4.nvim is available in a separate repository on GitHub - likec4/likec4.nvim.
Installation:

{
  'likec4/likec4.nvim',
  build = 'npm install -g @likec4/language-server'
}

JetBrains IDEs

LikeC4 has a JetBrains plugin for syntax highlighting and LSP integration with code navigation and completion.

The plugin is available in the JetBrains Marketplace and GitHub - likec4/jetbrains-plugin.