fix: export HookJSONOutput type from main module

Fixes #203

- Add HookJSONOutput to __init__.py exports for direct import
- Update examples/hooks.py to import from main module

Author: yudduy

examples/hooks.py

@@ -15,9 +15,10 @@
 import sys
 from typing import Any
 
-from claude_agent_sdk import ClaudeAgentOptions, ClaudeSDKClient
-from claude_agent_sdk.types import (
+from claude_agent_sdk import (
     AssistantMessage,
+    ClaudeAgentOptions,
+    ClaudeSDKClient,
     HookContext,
     HookJSONOutput,
     HookMatcher,
@@ -84,7 +85,9 @@ async def add_custom_instructions(
 async def example_pretooluse() -> None:
     """Basic example demonstrating hook protection."""
     print("=== PreToolUse Example ===")
-    print("This example demonstrates how PreToolUse can block some bash commands but not others.\n")
+    print(
+        "This example demonstrates how PreToolUse can block some bash commands but not others.\n"
+    )
 
     # Configure hooks using ClaudeAgentOptions
     options = ClaudeAgentOptions(
@@ -93,7 +96,7 @@ async def example_pretooluse() -> None:
             "PreToolUse": [
                 HookMatcher(matcher="Bash", hooks=[check_bash_command]),
             ],
-        }
+        },
     )
 
     async with ClaudeSDKClient(options=options) as client:

src/claude_agent_sdk/__init__.py

@@ -23,6 +23,7 @@
     ContentBlock,
     HookCallback,
     HookContext,
+    HookJSONOutput,
     HookMatcher,
     McpSdkServerConfig,
     McpServerConfig,
@@ -308,6 +309,7 @@ async def call_tool(name: str, arguments: dict[str, Any]) -> Any:
     "PermissionUpdate",
     "HookCallback",
     "HookContext",
+    "HookJSONOutput",
     "HookMatcher",
     # Agent support
     "AgentDefinition",