creating-zed-extensions
Creating Zed Extensions
Overview
Zed extensions are Rust programs compiled to WebAssembly that can provide slash commands, language support, themes, grammars, and MCP servers. Extensions implement the zed::Extension trait and are distributed via Zed's extension registry.
When to Use
Create a Zed extension when:
- Adding custom slash commands to the Assistant (
/deploy,/analyze,/fetch-docs) - Providing language support (syntax highlighting, LSP, formatting)
- Creating custom color themes
- Integrating external tools via slash commands
- Providing MCP server integrations
Don't create for:
- Simple rules or instructions (use
.rulesfiles) - One-time scripts (use terminal)
- Project-specific configuration (use
.zed/settings.json)
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