Verification — fw-09-query-cache

A module is complete when these pass against measured or observed output, not when the prose has been read.

  • All eleven build stages implemented
  • All six races built deliberately and fixed
  • Out-of-order response fix uses a sequence number; why timestamps fail is explained
  • Optimistic rollback onto a changed base specified and defended

Gate (§44) — for every source-reading exercise in this module

  • Why does this code exist?
  • What invariant does it maintain?
  • Who calls it?
  • What does it call?
  • Which process and thread executes it?
  • What happens if it is removed?
  • How is it tested?
  • What simpler design would fail, and why?

Record