Before you dive in
What you’ll find in the original
- Probe available sources before choosing a handler so ambiguity is not silently sent to a default route.
- Represent routing as four explicit states and retain the evidence that moved a request between them.
- Treat prompt-only confidence as ordinal; require labelled evaluation and ECE or Brier measurements before calling it calibrated.
Worth knowing
Only the L0 prompt-only tier ships. L1 and L2, including Jev or Laya, are explicitly planned, so this is a decision-design lesson rather than a working Jev integration.