spiegel-keyman/docs/settings/linux/extensions.json

{
  // See http://go.microsoft.com/fwlink/?LinkId=827846
  // for the documentation about the extensions.json format
  "recommendations": [
    "asabil.meson",
    "EditorConfig.editorconfig",
    "ms-python.python",
    "rust-lang.rust",
  ]
}