- Add `DisableType` support to plugin host adapters and registry mappings.
- Route disabled thinking to `between_tools` for models like Claude Sonnet 5.5.
- Fall back to low-effort adaptive thinking for models that reject disabled states.
Closes: #6698
Use Home credential options as authoritative model capability
configuration for compat handling and prompt cache behavior.
Expose quota provider operations through the public plugin host API.
- Add `SchedulerAcrossPriorities` capability to allow plugin schedulers to receive candidates across all priority tiers.
- Propagate scheduler priority preferences through the plugin host and RPC capabilities.
- Update auth manager selection logic to supply candidates across all priorities when the scheduler opts in.
Closes: #5894
