diff --git a/agent/ai_analyzer.py b/agent/ai_analyzer.py
index 65ae128..7a91826 100644
--- a/agent/ai_analyzer.py
+++ b/agent/ai_analyzer.py
@@ -3,8 +3,7 @@
 Supports multiple LLM providers: Groq (FREE), Together AI, OpenRouter, Anthropic, etc.
 """
 import os
-import json
-from typing import Dict, List, Optional
+from typing import Optional
 
 class AIAnalyzer:
     """
diff --git a/agent/explainer.py b/agent/explainer.py
index b4f41fc..bcef120 100644
--- a/agent/explainer.py
+++ b/agent/explainer.py
@@ -1,7 +1,7 @@
 """
 Explainer Engine - Generate human-readable explanations for fixes
 """
-from typing import Dict, Optional
+from typing import Dict
 
 class ExplainerEngine:
     """Generate detailed explanations for each code fix"""
diff --git a/agent/git_ops.py b/agent/git_ops.py
index 2daeb18..1acdd4b 100644
--- a/agent/git_ops.py
+++ b/agent/git_ops.py
@@ -1,4 +1,3 @@
-import os
 import subprocess
 from git import Repo
 from datetime import datetime
diff --git a/agi_engineer_v2.py b/agi_engineer_v2.py
index 8569e5a..63db283 100644
--- a/agi_engineer_v2.py
+++ b/agi_engineer_v2.py
@@ -204,7 +204,7 @@ def main():
         return 1
     finally:
         if cleanup_needed and temp_dir and os.path.exists(temp_dir):
-            print(f"\n🧹 Cleaning up...")
+            print("\n🧹 Cleaning up...")
             shutil.rmtree(temp_dir)
 
 
diff --git a/agi_engineer_v3.py b/agi_engineer_v3.py
index 5544072..0038885 100644
--- a/agi_engineer_v3.py
+++ b/agi_engineer_v3.py
@@ -8,8 +8,6 @@
 import argparse
 import shutil
 import tempfile
-import subprocess
-import json
 
 BASE_DIR = os.path.dirname(os.path.abspath(__file__))
 AGENT_DIR = os.path.join(BASE_DIR, "agent")
@@ -23,7 +21,7 @@
     push_branch, create_pull_request,
     generate_branch_name, generate_pr_body, get_repo_info
 )
-from rule_classifier import RuleClassifier, RuleCategory
+from rule_classifier import RuleClassifier
 from fix_orchestrator import FixOrchestrator
 from explainer import ExplainerEngine
 from safety_checker import SafetyChecker
@@ -319,7 +317,7 @@ def main():
         return 1
     finally:
         if cleanup_needed and temp_dir and os.path.exists(temp_dir):
-            print(f"\n🧹 Cleaning up...")
+            print("\n🧹 Cleaning up...")
             shutil.rmtree(temp_dir)
 
 
diff --git a/repos/test-repo b/repos/test-repo
new file mode 160000
index 0000000..21c1ba8
--- /dev/null
+++ b/repos/test-repo
@@ -0,0 +1 @@
+Subproject commit 21c1ba871d2312b5e3589214385e7f3ceb0855e2