This book constitutes the thoroughly refereed post-proceedings of the 13th Agent-Oriented Software Engineering (AOSE) workshop, held at the 11th International Conference on Autonomous Agents and Multiagent Systems, AAMAS 2012, in Valencia, Spain, in June 2012.

Model-Driven Approaches to AOSE.- A Methodological Approach to Model Driven Design of Multiagent Systems.- A Norm-Governed Holonic Multi-agent System Metamodel.- Specification of Trade-Off Strategies for Agents: A Model-Driven Approach.- MDA-Based Approach for Implementing Secure Mobile Agent Systems.- Engineering Pervasive and Ubiquitous Multiagent Systems.- Developing Pervasive Agent-Based Applications: A Comparison of Two Coordination Approaches.- Agent Perception within CIGA: Performance Optimizations and Analysis.- Ambient Intelligence with INGENIAS.- AOSE Methodologies.- Analysing the Suitability of Multiagent Methodologies for e-Health Systems.- How to Extract Fragments from Agent Oriented Design Processes.- Forward Self-combined Method Fragments.- “Engineering” Agent-Based Simulation Models?.

Post-proceedings of the 13th Agent-Oriented Software Engineering Workshop Special workshop theme: to explore, from an agent-based perspective, foundations, models, methods, architectures, and tools for engineering future software-intensive IT ecosystems