Add types, add missing MPL header that I skipped the check for

api/lua/client.lua

@@ -24,9 +24,6 @@ local function new_window(props)
     return props
 end
 
--- NOTE: these functions are duplicated here for documentation
--- |     and because I don't know of a better way
-
 ---Set a window's size.
 ---@param size { w: integer?, h: integer? }
 function window:set_size(size)
@@ -130,6 +127,8 @@ function client.get_windows()
         },
     })
 
+    -- INFO: these read synchronously so this should always work IF the server works correctly
+
     local window_props = ReadMsg().RequestResponse.response.GetAllWindows.windows
     ---@type Window[]
     local windows = {}

api/lua/msg.lua

@@ -1,3 +1,9 @@
+-- This Source Code Form is subject to the terms of the Mozilla Public
+-- License, v. 2.0. If a copy of the MPL was not distributed with this
+-- file, You can obtain one at https://mozilla.org/MPL/2.0/.
+--
+-- SPDX-License-Identifier: MPL-2.0
+
 ---@meta _
 
 ---@class _Msg

api/lua/process.lua

@@ -14,25 +14,26 @@ function process.spawn(command, callback)
     local callback_id = nil
 
     if callback ~= nil then
+        ---@param args Args
         table.insert(CallbackTable, function(args)
-            local args = args or {}
+            local args = args.Spawn or {} -- don't know if the `or {}` is necessary
             callback(args.stdout, args.stderr, args.exit_code, args.exit_msg)
         end)
         callback_id = #CallbackTable
     end
 
-    local command_str = command
-    local command = command
-    if type(command_str) == "string" then
-        command = {}
-        for i in string.gmatch(command_str, "%S+") do
-            table.insert(command, i)
+    local command_arr = {}
+    if type(command) == "string" then
+        for i in string.gmatch(command, "%S+") do
+            table.insert(command_arr, i)
         end
+    else
+        command_arr = command
     end
 
     SendMsg({
         Spawn = {
-            command = command,
+            command = command_arr,
             callback_id = callback_id,
         },
     })

src/api/msg.rs

@@ -136,7 +136,6 @@ pub enum OutgoingMsg {
 }
 
 #[derive(Debug, serde::Serialize, serde::Deserialize)]
-#[serde(untagged)]
 pub enum Args {
     /// Send a message with lines from the spawned process.
     Spawn {