feat(ipc): implement cli_tool_bridge as BeforeTool hook

scripts/cli_tool_bridge.py

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+import sys
+import json
+import logging
+import os
+
+# Add project root to sys.path so we can import api_hook_client
+sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
+
+try:
+    from api_hook_client import ApiHookClient
+except ImportError:
+    # Fallback for if we are running from root or other locations
+    sys.path.append(os.path.abspath(os.path.dirname(__file__)))
+    from api_hook_client import ApiHookClient
+
+def main():
+    # Setup basic logging to stderr so it doesn't interfere with stdout JSON
+    logging.basicConfig(level=logging.ERROR, stream=sys.stderr)
+    
+    try:
+        # 1. Read JSON from sys.stdin
+        input_data = sys.stdin.read()
+        if not input_data:
+            return
+
+        hook_input = json.loads(input_data)
+        
+        # 2. Extract 'tool_name' and 'tool_input'
+        tool_name = hook_input.get('tool_name')
+        tool_args = hook_input.get('tool_input', {})
+
+        # 3. Use 'ApiHookClient' (assuming GUI is on http://127.0.0.1:8999)
+        client = ApiHookClient(base_url="http://127.0.0.1:8999")
+        
+        try:
+            # 5. Request confirmation
+            # This is a blocking call that waits for the user in the GUI
+            response = client.request_confirmation(tool_name, tool_args)
+
+            if response and response.get('approved') is True:
+                # 5. Print 'allow' decision
+                print(json.dumps({"decision": "allow"}))
+            else:
+                # 6. Print 'deny' decision
+                print(json.dumps({
+                    "decision": "deny", 
+                    "reason": "User rejected tool execution."
+                }))
+
+        except Exception as e:
+            # 7. Handle cases where hook server is not reachable
+            print(json.dumps({
+                "decision": "deny", 
+                "reason": f"Hook server unreachable or error occurred: {str(e)}"
+            }))
+
+    except Exception as e:
+        # Fallback for unexpected parsing errors
+        print(json.dumps({
+            "decision": "deny", 
+            "reason": f"Internal bridge error: {str(e)}"
+        }))
+
+if __name__ == "__main__":
+    main()