-- SPARKIT: A Mind Map-Based MAS for Idea Generation Support. -- Cooperative Multi-agent Approach for Automated Computer Game Testing. -- On the external concurrency of current BDI frameworks for MAS. -- SADMA: Scalable Asynchronous Distributed Multi-Agent Reinforcement Learning Training Framework. -- Synergizing Trust and Autonomy: Gaia-X Enabled Multi-Agent Ecosystems for Advanced Freight Fleet Management. -- Cognitive Planning for Persuasive Multimodal Interaction. -- A Novel Bidding Strategy for PDAs using MCTS in Continuous Action Spaces. -- Jadex BDI Agents Integrated with MATSim for Autonomous Mobility on Demand. -- Towards Engineering Explainable Autonomous Systems. -- Enhancing Confidence of the vGOAL Interpreter Using SAT Solving. -- Agents for DDD --- Back and Forth.

This book constitutes the revised selected papers from the 12th International Workshop on Engineering Multi-Agent Systems, EMAS 2024, held in Auckland, New Zealand, during May 6–7, 2024. The 7 full papers and 4 short papers included in this book were carefully reviewed and selected from a total of 18 submissions. These papers focus on topics such as agent-oriented software engineering, programming multi-agent systems, declarative agent languages and technologies, artificial intelligence, and machine learning.