1 min read · 246 wordsintegrationarchitecture
Module 7: Integration & Flow
Overview
The shortest module and the capstone. Everything from Modules 1–6 — routing, dependency injection, services, models, schemas, observability — comes together in a single traced request, from the client's fetch() call to the HTTP response, with a real timing breakdown of where the milliseconds go.
What You'll Learn
- The complete 11-step path of
POST /agents/{id}/chat, from HTTP parsing to response serialization - Where time actually goes in a chat request (hint: it's not the database)
- How to debug the three most common failure modes: slow responses, 500 errors, wrong answers
Prerequisites
- All of Modules 1–6 — this lesson assumes you've already met every layer it references
Lessons in This Module
| # | Lesson | What it covers |
|---|---|---|
| 28 | Complete Backend Flow | One request, every layer, full timing breakdown |
Learning Outcomes
By the end of this module you can:
- Trace any request through this backend's layers without needing to open the source
- Identify which layer is responsible when something is slow, wrong, or erroring
- Explain, with real numbers, why 97% of a chat request's latency is the OpenAI call
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