CourseModel Context Protocol: The Complete Course · Module 9: Production and Ecosystem · part 64 of 77
Part 64 · Module 9: Production and Ecosystem

Lesson 3: Seeing inside the server, and jobs that survive

31 min read·13 Oct 2026
Module 9 · Lesson 3 · About 60 minutes · Needs: Lesson 1 of this module (the app factory and idempotency keys); Module 5 Lesson 3 (progress and cancellation in a handler); Module 2 Lesson 2 (the same on the wire)

The situation

Monday 5 October 2026, week 5. Nare says one answer took "ages" this morning, and nobody can say where the time went. Priya wants to import six papers as six notes in one job that survives a dropped connection and never creates a note twice.

You trace Nare's question, "How many participants will the nap study have?", through host and server. Then you run Priya's import, crash it and resume it.

MONDAY 5 OCTOBER, WEEK 5 notes server in production Nare: one answer took ages. Where? Priya: import 6 papers survive a dropped line needs a trace needs a checkpoint
Two problems arrive on the same day: a slow answer with no explanation (red, a failure) and a six-paper import (blue, the normal path) that must survive an interruption.

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