Agentic Design Patterns Based on "Agentic Design Patterns" by Antonio Gulli & Mauro Sauco (2025) 21 patterns across 4 tiers for building production-grade AI agent systems Pattern Catalog Part 1: Foundational Patterns 1. Prompt Chaining (Pipeline) Decompose complex tasks into sequential sub-problems where each step's output feeds the next. When to use : Task too complex for single prompt, multiple processing stages, external tool integration between steps. Implementation : - Assign distinct roles per stage (Analyst → Transformer → Writer) - Use structured output (JSON/XML) between stages for d…