CourseAI System Design: The Complete Course · Module 8: Orchestration and State · part 56 of 107
Part 56 · Module 8: Orchestration and State

Lesson 3: Persistent memory that helps and cannot be turned

30 min read·
Module 8 · Lesson 3 · About 50 minutes · Needs: Module 6 lesson 3 (permissions at retrieval), Module 5 lesson 2 (retention). One optional cell calls a model; the rest needs no key

The situation

Week 8. On 5 October 2026 Quinn Iqbal, in Tallis Retail Group's IT team, reported a cracked laptop screen through Cases (ticket TCK-0412, added in this lesson), asked about leave and said he likes short answers. On 12 October he asks "Any news on my laptop replacement?" and Ask has forgotten everything.

Joel wants Northdesk to remember. Leila asks what it keeps, for whom and for how long. Gareth asks where untrusted text gets into memory.

The rest of this course is yours to keep

This course is bought on its own, once, and stays readable afterwards, including the parts added to it later.

Or open everything with a plan