pi-ai infers a request's shape from the provider id and baseURL, and for
an endpoint it does not recognize it answers as though it were OpenAI
itself. A hand-declared route is by construction such an endpoint, so a
model declaring reasoningEfforts sent its system prompt as the developer
role with no configuration able to say otherwise — a gateway rejecting
that role could not be connected at all. Writing the switch anyway
validated, persisted, and was then dropped, so the misconfiguration
looked applied.
Three drift gates classify all thirty upstream compat fields as offered
or withheld, keyed by `keyof` so a pi-ai upgrade fails the build until
the new field is classified. Twenty are offered: what a private URL
cannot imply. The rest stay withheld because pi-ai's installed catalog
sets them for a named vendor.
Protocol applicability is now per field rather than per block, so
supportsDeveloperRole reaches an openai-responses route and the
anthropic-messages switches reach theirs. A compat key no protocol
declares, or one a gate withholds, is refused where it is written.
Fixes#2646
Refs #1976
Yichen Jiang
884f7b9c41