Case Studies — Two Real Agent Flows

◢ Chapter 05 · Case Studies

Two real agent flows, pulled apart.

Patterns are LEGO bricks. Here's how those bricks click together in two very different real systems — one engineer-led with live code, one PM-led with a full contract spec.

05ACase study

The LinkedIn Writer

A working multi-agent system: research agent + evaluator-optimizer writer pipeline, streamed over SSE. The architecture behind the live demo in Chapter 6.

Orchestrator-WorkersReActEvaluator-Optimizer

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05BCase study

The AI PM Briefing

A 7-stage signal-to-LinkedIn pipeline. Real PM contract: input schema, critic rubric with weights, failure modes, human touchpoints. Solves the hook problem with Fan-Out + Reflection.

Single AgentMemory-AugmentedFan-Out + ReflectionHITL

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◢ Why two

Engineer-shaped vs PM-shaped.

The LinkedIn Writer shows you the wires — code, SSE events, tool calls. The AI PM Briefing shows you the contract — schemas, rubrics, weights, the people in the loop. Real systems need both lenses.