zed

Zed

Zed is a high-performance, multiplayer code editor written in Rust with a GPU-accelerated UI, native Tree-sitter parsing, and fast Language Server Protocol (LSP) intelligence.

When to Use

• High-Performance Rust-Engineered Code Editing: Sub-millisecond typing latency, instant file opening, and smooth 120 FPS rendering.
• Real-Time Multiplayer Pair Programming: Collaborating directly in the editor buffer with audio chat and shared cursor sessions.
• Integrated Language Model (LLM) Assistants: Generating code, refactoring functions, and querying codebase context natively.
• Modern Tree-sitter & LSP Polyglot Development: Seamless out-of-the-box support for Rust, TypeScript, Python, and Go.

Quick Start

1. Minimal ~/.config/zed/settings.json

{
  "theme": "One Dark",
  "buffer_font_family": "JetBrains Mono",
  "buffer_font_size": 14,
  "tab_size": 2,
  "hard_tabs": false,
  "format_on_save": "on",
  "formatter": "auto",
  "lsp": {
    "rust-analyzer": {
      "initialization_options": {
        "checkOnSave": { "command": "clippy" }
      }
    }
  }
}

2. Core Shortcuts

• Cmd + P: File finder
• Cmd + Shift + P: Command palette
• Cmd + Shift + F: Project search
• Cmd + ?: Toggle AI Assistant panel

Core Concepts

Production Zed Configuration (~/.config/zed/settings.json)

Configuring typography, formatters, LSP language servers, and AI integration:

{
  "theme": "One Dark",
  "ui_font_size": 15,
  "buffer_font_size": 14,
  "buffer_font_family": "JetBrains Mono",
  "autosave": "on_focus_change",
  "format_on_save": "on",
  "tab_size": 2,
  "telemetry": {
    "diagnostics": false,
    "metrics": false
  },
  "languages": {
    "TypeScript": {
      "language_servers": ["vtsls", "!typescript-language-server"],
      "formatter": {
        "external": {
          "command": "prettier",
          "arguments": ["--stdin-filepath", "{buffer_path}"]
        }
      }
    },
    "Rust": {
      "language_servers": ["rust-analyzer"]
    },
    "Python": {
      "language_servers": ["pyright", "ruff"]
    }
  },
  "assistant": {
    "default_model": {
      "provider": "anthropic",
      "model": "claude-3-5-sonnet"
    }
  }
}

Custom Modal & Vim Keybindings (~/.config/zed/keymap.json)

Customizing keymaps for high-speed navigation:

[
  {
    "context": "Editor && vim_mode == normal",
    "bindings": {
      "space f f": "file_finder::Toggle",
      "space f g": "pane::DeploySearch",
      "space b d": "pane::CloseActiveItem",
      "space c a": "editor::ToggleCodeActions",
      "g d": "editor::GoToDefinition",
      "g r": "editor::FindAllReferences"
    }
  }
]

Instant Multiplayer Collaboration

• Click the Collaborate icon in the top right window header.
• Share your room link or invite team members via GitHub username.
• Teammates share editor views, follow cursors, and edit code concurrently without screen-sharing lag.

Common Patterns

Multi-Buffer Project Search & Replace

Problem: Searching across entire codebase and editing results simultaneously in a single unified buffer.

Solution:

[
  {
    "context": "ProjectSearchView",
    "bindings": {
      "alt-enter": "project_search::OpenInMultiBuffer"
    }
  }
]

Configuring Custom Language Servers in Zed

Problem: Configure specific language server arguments and formatters in Zed.
Solution: Define server settings in settings.json.

{
  "languages": {
    "Python": {
      "language_servers": ["pyright", "ruff"],
      "format_on_save": "on",
      "formatter": {
        "external": {
          "command": "ruff",
          "arguments": ["format", "--stdin-filename", "{buffer_path}"]
        }
      }
    }
  }
}

Best Practices

Do:

• Configure format_on_save: "on" with external tools (Prettier, Ruff, Rustfmt) for automated code cleanliness.
• Use vtsls for TypeScript development in Zed for superior performance and memory efficiency.
• Enable Vim mode ("vim_mode": true) if accustomed to modal editing workflows.
• Leverage the native Assistant Panel (Cmd + ?) with codebase context for rapid refactoring.

Don't:

• Overload project folders with unexcluded build caches (target, dist, .next).
• Hardcode private API keys in settings.json; use system keychain or environment variables.
• Leave collaborative rooms open and public when editing sensitive production configuration files.

Troubleshooting

Error	Cause	Solution
Language server fails to initialize	Server binary (e.g. gopls, pyright) not found in system $PATH	Install server binary globally or ensure it is accessible in user shell environment.
Keybinding clash with system shortcuts	Mac system keyboard shortcuts intercepting Zed keystrokes	Check settings.json keymap overrides under ~/.config/zed/keymap.json.
Zed AI Assistant fails to respond	Missing API key (OpenAI/Anthropic) or quota exceeded	Open Zed settings and configure "features": { "edit_prediction_provider": "copilot" } or provide API key.

References

• Zed Documentation