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MARL in Cooperative Environments
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How to Use This Tutorial

Use this page as your map from cooperative MARL foundations to current research frontiers, practical application, and system design.

Background

Start here if reinforcement learning or MARL is new to you.

You will build the foundation for:

  • multiple agents;
  • states and observations;
  • joint actions and policies;
  • cooperative rewards;
  • partial observability;
  • Dec-POMDPs.

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Question: How should the agents’ actions fit together?

Follow:

Introduction → Concepts → Knowledge Checks → Interactive Virtual Lab → Worksheet

You will:

  • understand the coordination problem;
  • compare different training approaches;
  • experiment with coordination directly in the website;
  • consolidate the main ideas and trade-offs.

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Question: What information should agents share?

Follow:

Introduction → Concepts → Knowledge Checks → Colab Lab → Worksheet

You will:

  • understand why communication can help;
  • study communication constraints and protocols;
  • train agents to learn a communication protocol;
  • test capacity, noise, and protocol mismatch.

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Question: What happens when the other agents change?

Follow:

Introduction → Concepts → Knowledge Checks → Colab Lab → Worksheet

You will:

  • distinguish familiar-partner performance from general cooperation;
  • study partner diversity and agent modelling;
  • evaluate agents with unseen partners;
  • observe adaptation when partner behaviour changes.

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Question: What changes when the cooperating agents are large language models?

Use what you learned about Coordinate + Communicate + Adapt to explore a rapidly developing research direction.

You will:

  • map LLM collaboration to the cooperative MARL framework;
  • compare orchestrated and learned collaboration;
  • connect shared rewards, credit assignment, and CTDE to multi-LLM training;
  • explore recent research on learning collaboration between LLM agents;
  • consider open questions around generalization, scalability, and agent societies.

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Apply:

Coordinate + Communicate + Adapt

You will work with wireless access points that must:

  • share a limited number of channels;
  • reduce interference;
  • coordinate using local information;
  • communicate when useful;
  • remain effective under changing conditions.

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Bring everything together.

You will decide:

  • what the agents are;
  • what they observe;
  • what actions they can take;
  • how they coordinate;
  • what they communicate;
  • how they adapt;
  • how the system should be evaluated.

Use this simple rhythm:

Understand → Test → Experiment → Consolidate

  • Understand: work through the concepts and visual explanations.
  • Test: complete the embedded knowledge checks.
  • Experiment: use the practical lab.
  • Consolidate: complete the worksheet.