Add the following to your settings.json:

{
  "languages": {
    "Zig": {
      // Formatting with ZLS matches `zig fmt`.
      // The Zig FAQ answers some questions about `zig fmt`:
      // https://github.com/ziglang/zig/wiki/FAQ
      "format_on_save": "language_server",
      "code_actions_on_format": {
        // Run code actions that currently supports adding and removing discards.
        // "source.fixAll": true,

        // Run code actions that sorts @import declarations.
        // Available since ZLS `0.14.0-dev.188+2be424de5`
        // "source.organizeImports": true,
      }
    }
  },
  "lsp": {
    "zls": {
      "binary": {
        // omit the following line if `zls` is in your PATH
        "path": "/path/to/zls_executable",
      },
      // There are two ways to set config options:
      //   - edit your `zls.json` that applies to any editor that uses ZLS
      //   - set in-editor config options with the `initialization_options` field below.
      //
      // Further information on how to configure ZLS:
      // https://zigtools.org/zls/configure/
      //
      // Support for `initializationOptions` in Zed requires at least ZLS `0.14.0-dev.22+a263b8dc6`.
      "initialization_options": {
        // Whether to enable build-on-save diagnostics
        //
        // Further information about build-on save:
        // https://zigtools.org/zls/guides/build-on-save/
        // "enable_build_on_save": true,

        // omit the following line if `zig` is in your PATH
        "zig_exe_path": "/path/to/zig_executable",
      }
    }
  }
}