• Starpls LSP for starlark, bazel, and buck files.
• Buck2 LSP for buck files.
• Tree sitter syntax for starlark and bazelrc files
• Tilt LSP for Tiltfiles.

By default, the extension only loads the Starpls LSP. If your project uses Buck2 or Tilt, you must manually enable the corresponding LSP in your zed settings

To use buck2:

{
  "languages": {
    "Starlark": {
      "language_servers": ["buck2-lsp", "!starpls", "!tilt"]
    }
  }
}

To use tilt:

{
  "languages": {
    "Starlark": {
      "language_servers": ["tilt", "!starpls", "!buck2-lsp"]
    }
  }
}

You can override the path to the LSP binary and its arguments by adding a binary section to your LSP settings (this works for all of starpls, buck2-lsp, and tilt):

{
  "lsp": {
    "starpls": {
      "binary": {
        "path": "/path/to/starpls",
        "arguments": ["server", "--experimental_enable_label_completions"]
      }
    }
  }
}