refactor: adapt multi-agent-mux skills and agent guidelines for the Team Leader scenario

.agents/skills/multi-agent-mux-delegate-job/multi-agent-mux-delegate-job

@@ -252,10 +252,9 @@ Task: $current_prompt"
         # Worker completed successfully, now switch to reviewer
         current_role="reviewer"
         current_session="$REVIEWER_SESSION"
-        
         # Build reviewer prompt based on type
         if [[ "$TYPE" == "loop" ]]; then
-          current_prompt="Review the changes/artifacts generated for job $JOB_ID. Check if they meet the requirements. If correct, publish completed event with 'PASS'. If there are issues, publish error event with detailed feedback/nits."
+          current_prompt="Review the changes/artifacts generated for job $JOB_ID. Check if they meet the requirements. If correct, publish completed event with 'PASS'. If there are issues, publish error event with detailed feedback/nits. CRITICAL: When raising issues or giving a review, you MUST include the exact reason for the issue and a clear direction for improvement (문제 제시에 대한 이유와 확실한 개선 방향을 반드시 포함해야 합니다)."
         elif [[ "$TYPE" == "discuss" ]]; then
           current_prompt="Read draft/documents generated for job $JOB_ID. Review the feasibility and content. Write your feedback/objections. If you agree with the plan, reply with 'AGREE'."
         fi
@@ -264,7 +263,7 @@ Task: $current_prompt"
           echo "Reviewer did not complete successfully (status: $job_status). Terminating workflow."
           break
         fi
-
+ 
         # Reviewer finished. Check if pass/agree
         local success=0
         if [[ "$TYPE" == "loop" ]]; then
@@ -276,7 +275,7 @@ Task: $current_prompt"
             success=1
           fi
         fi
-
+ 
         if [[ "$success" == "1" ]]; then
           echo "Reviewer approved the work. Finalizing job as completed."
           "$PY" "$SCRIPT_DIR/scripts/registry.py" --registry-dir "$REGISTRY_DIR" status --job "$JOB_ID" --set "completed"
@@ -292,7 +291,7 @@ Task: $current_prompt"
           iteration=$((iteration + 1))
           current_role="worker"
           current_session="$AGENT_SESSION"
-          current_prompt="The reviewer provided the following feedback for job $JOB_ID: $feedback. Please modify the code/artifacts to address these comments."
+          current_prompt="The reviewer provided the following feedback for job $JOB_ID: $feedback. Please modify the code/artifacts to address these comments. CRITICAL: As the Developer Team Leader, you must thoroughly review the suggested modifications, verify their validity, adopt/implement them if valid, and if you judge any recommendation to be invalid, do NOT implement it but instead explain your reasons clearly in your response and send it back to the reviewer (수정안을 최대한 꼼꼼히 검토하여 타당성을 검증하고, 타당하다면 수렴하여 수정을 진행하되, 타당하지 않다고 판단되는 부분이 있다면 그 이유를 명확히 밝혀 리뷰어에게 전달하십시오)."
         fi
       fi
     done