Lesson 2: Sessions, context budgets and a cache that survives
31 min read·
Module 8 · Lesson 2 · About 55 minutes · Needs: Module 3 lessons 2 and 6 (history replay, prefix cache). One block calls a hosted model
The situation
Week 8. Joel wants follow-ups to work. Funmi asks what a long session does to the 1,500 ms first-token target, Ana what turn 30 costs, Leila when transcripts are deleted, Gareth what happens to a fact from turn 3 when turn 12 needs it.
The running example: Tallis employee t-tallis-u017 (finance) in a twelve-turn session on 5 October 2026, scripted for this lesson. Turn 3 says "My parental leave starts on 1 March 2027"; turn 12 asks "So when does my full pay end?"