Three small cleanups in the OpenAI Responses protocol:
- Unify `HOSTED_TOOL_NAMES` + `hostedToolInput` into one `HOSTED_TOOLS`
record per tool: `{ name, input: (item) => unknown }`. Adding a new
hosted tool is now a single entry instead of two parallel switches that
must stay in sync.
- Tighten `isHostedToolItem`'s narrowing to include the `type` field, so
callers know they're dealing with a known hosted-tool shape (not just
"has an id"). Drives a cleaner `hostedToolEvents` signature.
- Split the body schema into a shared `OpenAIResponsesCoreFields` record
used by both the HTTP body (adds `stream: true`) and the WebSocket
`response.create` message (adds `type`). Removes the destructure-and-
strip dance at schema definition time. Runtime conversion in
`webSocketMessage` still strips `stream` because OpenAI's WebSocket API
doesn't expect it on the wire.
Plus a tiny fix in bedrock-converse.ts: explicit `Route.model<BedrockConverseModelInput>`
type argument so the mapInput overload selects properly (was inferring
to the narrower `RouteModelInput`).
Kit Langton
c4c60e76ae