3. Key  Design  Patterns  
Pattern  Description  Best  Use  Case  
Reflection  The  agent  reviews  its  own  work  and  corrects  errors. Code  generation  and  creative  writing. Tool  Use  The  agent  identifies  when  it  lacks  info  and  calls  an  API. Real-time  data  retrieval  (Stock  prices,  Weather). Planning  The  agent  creates  a  roadmap  before  executing. Complex  project  management. Multi-Agent  Different  agents  with  "roles"  collaborate. Software  development  (Dev,  QA,  DevOps  roles).