Checkpoint hints are wired from session config into repo preparation, with the gate constructed as false so nothing uses them.
What
The cloud runner can re-read its session config after registering to pick up a hint about which commit each repo should already be at, and pass it into repo preparation. The call site constructs the hint with its gate set to false, and the helper returns nothing when the gate is false, so no run uses it in this build.
Details
- Hints are validated per repo (name plus base commit SHA), the count is capped, and malformed entries are logged and dropped.
- The prefetched-tip helper the hint feeds returns nothing unconditionally.
Evidence
hintedBeforeRegister
Strings lifted out of the shipped bundle, so the claim above can be checked against them.