Layered Server Architecture
Separate transport, handlers, and business logic.
Why One Big File Hurts
A server crammed into one file mixes transport, tool logic, and data calls. As it grows, every change risks breaking something far away.
Think in Layers
A clean server splits into layers: transport at the edge, MCP handlers in the middle, and pure business logic underneath.
All lessons in this course
- Layered Server Architecture
- Config & Secrets via Environment
- Idempotent, Side-Effect-Aware Tools
- Versioning Tools & Schemas