Fix Go build

Author: SteveSandersonMS

go/process_other.go

@@ -1,4 +1,4 @@
-// go:build !windows
+//go:build !windows
 
 package copilot
 

go/process_windows.go

@@ -1,4 +1,4 @@
-// go:build windows
+//go:build windows
 
 package copilot
 

python/README.md

@@ -98,8 +98,6 @@ await client.stop()
 - `github_token` (str): GitHub token for authentication. When provided, takes priority over other auth methods.
 - `use_logged_in_user` (bool): Whether to use logged-in user for authentication (default: True, but False when `github_token` is provided). Cannot be used with `cli_url`.
 
-> **Note:** On Windows, the SDK automatically hides the console window when spawning the CLI process to avoid distracting users in GUI applications.
-
 **SessionConfig Options (for `create_session`):**
 
 - `model` (str): Model to use ("gpt-5", "claude-sonnet-4.5", etc.). **Required when using custom provider.**

python/copilot/client.py

@@ -1167,15 +1167,8 @@ async def _start_cli_server(self) -> None:
         if self.options.get("github_token"):
             env["COPILOT_SDK_AUTH_TOKEN"] = self.options["github_token"]
 
-        # Prepare subprocess kwargs
-        popen_kwargs = {
-            "cwd": self.options["cwd"],
-            "env": env,
-        }
-
         # On Windows, hide the console window to avoid distracting users in GUI apps
-        if sys.platform == "win32":
-            popen_kwargs["creationflags"] = subprocess.CREATE_NO_WINDOW
+        creationflags = subprocess.CREATE_NO_WINDOW if sys.platform == "win32" else 0
 
         # Choose transport mode
         if self.options["use_stdio"]:
@@ -1187,7 +1180,9 @@ async def _start_cli_server(self) -> None:
                 stdout=subprocess.PIPE,
                 stderr=subprocess.PIPE,
                 bufsize=0,
-                **popen_kwargs,
+                cwd=self.options["cwd"],
+                env=env,
+                creationflags=creationflags,
             )
         else:
             if self.options["port"] > 0:
@@ -1197,7 +1192,9 @@ async def _start_cli_server(self) -> None:
                 stdin=subprocess.DEVNULL,
                 stdout=subprocess.PIPE,
                 stderr=subprocess.PIPE,
-                **popen_kwargs,
+                cwd=self.options["cwd"],
+                env=env,
+                creationflags=creationflags,
             )
 
         # For stdio mode, we're ready immediately