MCP Dev Summit North America

Creative assembly tasks - where agents compose pieces into coherent wholes - present unique challenges: tracking progress across turns, validating outputs, and recovering when something doesn't fit. This talk shares patterns for multi-turn workflows, illustrated through avatar generation where an agent assembles clothing into cohesive outfits.
Pattern 1: Session Memory - Track selections, failed searches, and partial progress across turns. Know what's in the cart before suggesting more.
Pattern 2: Composite Tools - Combine operations (search + fetch thumbnails) into single tools that reduce round-trips and give agents richer context.
Pattern 3: Pre-flight Validation - Check compatibility before expensive operations. Catch conflicts early (clashing items, missing pieces) rather than failing at generation.
Pattern 4: Validate-and-Retry Loops - Use VLM scoring on outputs, track best-of-N attempts, and guide agents toward improvements when quality falls short.
Avatar generation makes these patterns concrete - "getting dressed" is intuitive - but they apply broadly to document assembly, configuration builders, and any workflow composing parts into wholes.