From f999e927b5d0745efd8c87fc7753bae14d78d36d Mon Sep 17 00:00:00 2001
From: Kaloyan Aleksiev <67751757+kallyaleksiev@users.noreply.github.com>
Date: Tue, 1 Jul 2025 18:11:25 +0100
Subject: [PATCH 1/2] json buffer: do not refresh before error

---
 .../_internal/transport/subprocess_cli.py         | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/src/claude_code_sdk/_internal/transport/subprocess_cli.py b/src/claude_code_sdk/_internal/transport/subprocess_cli.py
index 288b2e7..e050230 100644
--- a/src/claude_code_sdk/_internal/transport/subprocess_cli.py
+++ b/src/claude_code_sdk/_internal/transport/subprocess_cli.py
@@ -95,9 +95,10 @@ def _build_command(self) -> list[str]:
             cmd.extend(["--model", self._options.model])
 
         if self._options.permission_prompt_tool_name:
-            cmd.extend(
-                ["--permission-prompt-tool", self._options.permission_prompt_tool_name]
-            )
+            cmd.extend([
+                "--permission-prompt-tool",
+                self._options.permission_prompt_tool_name,
+            ])
 
         if self._options.permission_mode:
             cmd.extend(["--permission-mode", self._options.permission_mode])
@@ -109,9 +110,10 @@ def _build_command(self) -> list[str]:
             cmd.extend(["--resume", self._options.resume])
 
         if self._options.mcp_servers:
-            cmd.extend(
-                ["--mcp-config", json.dumps({"mcpServers": self._options.mcp_servers})]
-            )
+            cmd.extend([
+                "--mcp-config",
+                json.dumps({"mcpServers": self._options.mcp_servers}),
+            ])
 
         cmd.extend(["--print", self._prompt])
         return cmd
@@ -203,7 +205,6 @@ async def read_stderr() -> None:
                         json_buffer += json_line
 
                         if len(json_buffer) > _MAX_BUFFER_SIZE:
-                            json_buffer = ""
                             raise SDKJSONDecodeError(
                                 f"JSON message exceeded maximum buffer size of {_MAX_BUFFER_SIZE} bytes",
                                 ValueError(

From a231b801783b24ed2b8c0ee6d006a2d1fe0c5564 Mon Sep 17 00:00:00 2001
From: Kaloyan Aleksiev <67751757+kallyaleksiev@users.noreply.github.com>
Date: Tue, 1 Jul 2025 18:15:44 +0100
Subject: [PATCH 2/2] ruff: do not refresh change upstream formatting

---
 .../_internal/transport/subprocess_cli.py          | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/src/claude_code_sdk/_internal/transport/subprocess_cli.py b/src/claude_code_sdk/_internal/transport/subprocess_cli.py
index e050230..43de493 100644
--- a/src/claude_code_sdk/_internal/transport/subprocess_cli.py
+++ b/src/claude_code_sdk/_internal/transport/subprocess_cli.py
@@ -95,10 +95,9 @@ def _build_command(self) -> list[str]:
             cmd.extend(["--model", self._options.model])
 
         if self._options.permission_prompt_tool_name:
-            cmd.extend([
-                "--permission-prompt-tool",
-                self._options.permission_prompt_tool_name,
-            ])
+            cmd.extend(
+                ["--permission-prompt-tool", self._options.permission_prompt_tool_name]
+            )
 
         if self._options.permission_mode:
             cmd.extend(["--permission-mode", self._options.permission_mode])
@@ -110,10 +109,9 @@ def _build_command(self) -> list[str]:
             cmd.extend(["--resume", self._options.resume])
 
         if self._options.mcp_servers:
-            cmd.extend([
-                "--mcp-config",
-                json.dumps({"mcpServers": self._options.mcp_servers}),
-            ])
+            cmd.extend(
+                ["--mcp-config", json.dumps({"mcpServers": self._options.mcp_servers})]
+            )
 
         cmd.extend(["--print", self._prompt])
         return cmd