feat(conductor): Restore mma_implementation track

tests/mock_gemini_cli.py

@@ -6,9 +6,11 @@ import os
 def main():
     # Debug log to stderr
     sys.stderr.write(f"DEBUG: mock_gemini_cli called with args: {sys.argv}\n")
+    sys.stderr.write(f"DEBUG: GEMINI_CLI_HOOK_CONTEXT: {os.environ.get('GEMINI_CLI_HOOK_CONTEXT')}\n")
     
     # Read prompt from stdin
     try:
+        # On Windows, stdin might be closed or behave weirdly if not handled
         prompt = sys.stdin.read()
     except EOFError:
         prompt = ""
@@ -47,6 +49,7 @@ def main():
     sys.stderr.flush()
 
     try:
+        # CRITICAL: Use the current process environment to ensure GEMINI_CLI_HOOK_CONTEXT is passed
         process = subprocess.Popen(
             [sys.executable, bridge_path],
             stdin=subprocess.PIPE,