TL;DR

Most AI agents fail because they try to do too much in one shot. The best AI systems break work into Planning and Execution stages. This guide shows you the 5 proven patterns used by Anthropic, OpenAI, and GPT-4 — and how to build them yourself

Why Most AI Agents Fail

You've probably experienced this:

  • Ask an AI to "setup automations for you" → it hallucinates steps

  • Ask it to "process this data" → it misses context

The problem isn’t the AI model, its the architecture

Standalone LLMs have no memory, no tools, and no coordination. They work in isolation, making decisions without full context

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“Agents begin their work with interactive discussion with the human user. Once the task is clear, agents plan and operate independently.”

Anthropic, “Building Effective Agents“

The 5 AI Agent Patterns You Need to Know

Based on research from Anthropic, OpenAI, LangChain, and production AI systems, here are the patterns that work:

1. Prompt Chaining

What it is: Break complex tasks into sequential steps. Each step's output becomes the next step's input

When to use it:

  • Data Processing pipelines

  • Multi-Step Transformations

  • Document Analysis Workflows

Example:

A user uploads raw data → AI extracts key fields → cleans the data → analyzes trends and generates a report. Each step builds on the last

Prompt Chaining in Lamatic: API Request → Extract Data → Clean Data → Generate Report → Response

2. Routing

What it is: Use an AI to classify intent and route to specialized handlers

When to use it:

  • Customer support (route by intent)

  • Content processing (route by type)

  • Multi-purpose assistants

Example:

Customer Sends “I want to upgrade my plan“ → Classifier detects “sales” intent → Routes to Sales agent (not Support or Technical)

Routing in Lamatic: Chat Trigger → Intent Classifier → Condition branches to Sales Agent, Support Agent, or Technical Support

3. Orchestrator - Workers

What it is: A central AI breaks down tasks and delegates to specialized worker agents

When to use it:

  • Complex projects with multiple components

  • Research and synthesis tasks

  • Code generation with multiple files

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“The orchestrator dynamically breaks down tasks, delegates them to worker LLMs, and synthesizes their results.”

OpenAI

Example:

User asks for a blog post → Orchestrator assigns: Research Agent (gather facts) → Writer Agent (draft content) → Editor Agent (polish) → Synthesize Results

Orchestrator-Workers in Lamatic: API Request → Orchestrator → Branching to Writer Agent, Editor Agent, Research Agent → Synthesize Results → Response

4. Plan and Execute

What it is: First create a complete plan, then execute step by step.

Why it is powerful:

  • Users can approve before Execution

  • Each step of Execution has the “Plan”

  • Results are predictable

This is the pattern used by:

  • Cursor AI

  • Devin(Cognition)

  • GPT Pilot (33k GitHub Stars)

Example:

User says "Book my tickets to Paris" → Planner creates plan → Condition checks if clarification needed → If clear, shows plan for approval → User confirms → Executes step by step.

Plan-and-Execute in Lamatic: Chat Trigger → Planner → Condition → Ask Questions OR Show Plan → Execute Plan → Response

5. Evaluator - Optimizer

What it is: Generate output, evaluate it, refine until it meets criteria

When to use it:

  • Content that needs quality checks

  • Code that needs testing

  • Outputs that need validation

Example:

AI generates content → Evaluator scores it (1-10) → If score < 8, Refiner improves it with feedback → If score ≥ 8, output passes quality check.

Evaluator-Optimizer in Lamatic: API Request → Generator → Evaluator → Condition → Quality Passed OR Refiner → Refined Output → Response

The Secret: Combine Patterns for Maximum Power

The best AI systems don't use just one pattern — they combine them:

Stage

Pattern

Purpose

Intent

Routing

Understand user wants

Planning

Evaluator-Optimizer

Clarify and confirm plan

Execution

Orchestrator-Workers

Generate each component

Validation

Prompt Chaining

Check and refine output

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“Start with the simplest solution and only increase complexity when necessary“

Anthropic

Key Takeaways

  1. Don't use bare LLMs — they lack memory, tools, and coordination

  2. Break complex tasks into stages — Planning → Execution

  3. Validate before output — catch errors early

  4. Start simple, add complexity as needed