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The Zed Rust Extension API

This crate lets you write extensions for Zed in Rust.

Extension Manifest

You'll need an extension.toml file at the root of your extension directory, with the following structure:

id = "my-extension"
name = "My Extension"
description = "..."
version = "0.0.1"
schema_version = 1
authors = ["Your Name <you@example.com>"]
repository = "https://github.com/your/extension-repository"

Cargo metadata

Zed extensions are packaged as WebAssembly files. In your Cargo.toml, you'll need to set your crate-type accordingly:

[dependencies]
zed_extension_api = "0.1.0"

[lib]
crate-type = ["cdylib"]

Implementing an Extension

To define your extension, create a type that implements the Extension trait, and register it.

use zed_extension_api as zed;

struct MyExtension {
    // ... state
}

impl zed::Extension for MyExtension {
    // ...
}

zed::register_extension!(MyExtension);

Testing your extension

To run your extension in Zed as you're developing it:

  • Open the extensions view using the zed: extensions action in the command palette.
  • Click the Install Dev Extension button in the top right
  • Choose the path to your extension directory.

Compatible Zed versions

Extensions created using newer versions of the Zed extension API won't be compatible with older versions of Zed.

Here is the compatibility of the zed_extension_api with versions of Zed:

Zed version zed_extension_api version
0.149.x 0.0.1 - 0.1.0
0.131.x 0.0.1 - 0.0.6
0.130.x 0.0.1 - 0.0.5
0.129.x 0.0.1 - 0.0.4
0.128.x 0.0.1

Dependencies

~0.8–1.8MB
~37K SLoC