Concevoir des systèmes multi-agents
Comprenez les principes permettant d’orchestrer plusieurs agents LLM afin qu’ils collaborent, délèguent des tâches et atteignent des objectifs plus vastes.
Concevoir des systèmes multi-agents est une leçon Prompt Engineering & LLM Optimization for Developers gratuite sur CoddyKit. Ceci est la leçon 1 sur 4. Tu peux lire la leçon complète ci-dessous gratuitement — puis la pratiquer en direct dans le navigateur avec un éditeur de code intégré et un tuteur IA 24/7. Elle fait partie du parcours d'apprentissage Prompt Engineering & LLM Optimization for Developers, et ta progression se synchronise sur le web et l'application CoddyKit. Le cours Prompt Engineering & LLM Optimization for Developers comprend 4 leçons au total.
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Welcome to Multi-Agent Systems
Imagine a complex problem that's too big for one person to solve alone. You'd build a team, right? Each member brings their own skills.
That's the idea behind Multi-Agent Systems (MAS) in the world of Large Language Models (LLMs)! Instead of one powerful LLM, we use several, each with a specialized role.
Why Use Multiple LLM Agents?
While a single LLM can do a lot, multiple agents offer significant advantages for complex tasks:
- Specialization: Each agent masters a specific skill (e.g., planning, research, writing).
- Robustness: If one agent struggles, others can compensate or refine its output.
- Modularity: You can easily swap or upgrade individual agents without rebuilding the whole system.
- Parallel Processing: Different parts of a task can be handled simultaneously.
Core Concept: Agent Roles
A key to designing effective MAS is defining clear, specialized roles for each LLM agent. Think of it like a human project team:
- Planner Agent: Breaks down the main goal into smaller steps.
- Researcher Agent: Gathers relevant information.
- Writer Agent: Generates content based on input.
- Editor Agent: Reviews and refines generated content.
Each role focuses the LLM's capabilities, leading to more accurate and efficient outputs.
Core Concept: Communication Channels
For agents to collaborate, they need to communicate. This means exchanging information, instructions, and results. Common methods include:
- Shared Memory: A central database or context where agents can read and write information.
- Message Passing: Agents send explicit messages to each other, often through an orchestrator.
- Observation: Agents might observe changes in a shared environment or state.
Effective communication prevents redundancy and ensures agents work towards a common goal.
Core Concept: The Orchestration Layer
The orchestration layer is the 'brain' of a multi-agent system. It's not an LLM agent itself, but the logic that manages and coordinates the agents.
Its responsibilities include:
- Defining the overall workflow.
- Delegating tasks to specific agents.
- Synthesizing outputs from different agents.
- Handling communication flow.
- Managing the system's state and progress.
This layer ensures the agents work together harmoniously to achieve the main objective.
Design Principle: Task Decomposition
Complex problems are rarely solved in one go. Task decomposition is the process of breaking a large, overarching goal into smaller, more manageable sub-tasks.
For example, 'Write a comprehensive report' might decompose into:
- Outline report structure.
- Research topic A.
- Research topic B.
- Draft introduction.
- Draft section A.
- Draft section B.
- Review and edit.
Each sub-task can then be assigned to the most suitable agent.
Design Principle: Delegation & Collaboration
Once tasks are decomposed, the orchestration layer delegates them to specific agents. Agents often need to collaborate or delegate to each other.
For instance, a 'Planner Agent' might delegate a research task to a 'Researcher Agent'. The Researcher then returns its findings, which the Planner might pass to a 'Writer Agent'.
This flow of delegation and collaboration is crucial for completing multi-step objectives efficiently.
Example Scenario: Content Creation Team
Let's design a simple multi-agent system for generating a short blog post:
- User Input: "Write a blog post about the benefits of prompt engineering."
- Orchestrator: Receives input.
- 1. Planner Agent: Creates an outline (Intro, Benefits, Conclusion).
- 2. Researcher Agent: Gathers bullet points on "benefits of prompt engineering" based on the outline.
- 3. Writer Agent: Drafts the post section by section, using research.
- 4. Editor Agent: Reviews the draft for grammar, clarity, and tone.
- Orchestrator: Presents the final blog post to the user.
Each LLM agent focuses on its strength, guided by the orchestrator.
Orchestrating a Simple Task (Code)
This Python example simulates an orchestrator delegating a simple writing task to different 'agents' (represented by functions). Notice how the orchestrator manages the flow and passes information.
def main():
print("Orchestrator: Starting a new task!")
task = "Write a short blog post about multi-agent systems."
print(f"\nOrchestrator: Delegating '{task}' to Planner Agent.")
planner_response = planner_agent(task)
print(f"Planner Agent: {planner_response}")
research_topic = "key benefits of multi-agent systems"
print(f"\nOrchestrator: Delegating research on '{research_topic}' to Researcher Agent.")
research_response = researcher_agent(research_topic)
print(f"Researcher Agent: {research_response}")
print(f"\nOrchestrator: Delegating writing to Writer Agent, using research.")
writer_response = writer_agent(planner_response, research_response)
print(f"Writer Agent: {writer_response}")
print("\nOrchestrator: Task completed!")
def planner_agent(task):
# In a real system, an LLM would generate this plan
return "Plan: Research benefits, then draft post."
def researcher_agent(topic):
# In a real system, an LLM would perform web search/knowledge base query
return f"Research on {topic}: Specialization, robustness, collaboration."
def writer_agent(plan, research):
# In a real system, an LLM would write content based on inputs
return f"Draft based on '{plan}' and research: '{research}' is crucial for complex tasks."
if __name__ == "__main__":
main()Multi-Agent System Check
Which of the following are key benefits of designing a multi-agent system with LLMs, compared to using a single, monolithic LLM?
Recap & Next Steps
Great job! You've learned the fundamental principles behind designing multi-agent systems with LLMs.
We covered:
- Why multi-agent systems are powerful.
- The importance of agent roles and communication.
- The critical role of the orchestration layer.
- Key design principles like task decomposition, delegation, and collaboration.
These concepts are essential for building advanced LLM applications that can tackle highly complex and dynamic problems. Keep exploring how to bring these LLM teams to life!
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Toutes les leçons de ce cours
- Concevoir des systèmes multi-agents
- Gestion de la mémoire et de l’état des agents
- Automatisation autonome des flux de travail
- Boucles de réflexion et d’autocorrection des agents