yitaoh-oai e839b828fb Resolve model-selected search providers with policy-aware fallback (#59036) ...

## Why

Search discovery must account for the active model's supported tools while honoring host search restrictions. Automatic fallback must also preserve the provider that owns existing browsing references.

## What changed

- Resolve search from model metadata, client configuration, and managed requirements, exposing the selected provider's tools.
- Discover hosted search with the model's supported tools and carry the discovered invocation context into calls.
- Allow native fallback for eligible discovery failures only when search policy permits it and hosted search has not already been used. Do not replay failed hosted invocations through native search.
- Keep native fallback references on native search across later turns, discovery recovery, and resume. Release unused fallback offers and coordinate background calls to prevent conflicting provider use.

## Testing

Add app-server and core scenario coverage for provider selection, discovery failures, search restrictions, reference continuity, resume, and concurrent background search. Include a snapshot covering discovery and call history across a model switch.

GitOrigin-RevId: 0f22605722daaa424c4fa34660654cde5a6db049

2026-11-03 02:08:56 +00:00

..

schema

Resolve model-selected search providers with policy-aware fallback (#59036)

2026-11-03 02:08:56 +00:00

scripts

Generate Python SDK types from repository app-server schemas (#44032)

2026-09-09 03:27:31 +00:00

src

Add web search provider metadata and configuration (#59033)

2026-11-03 01:58:18 +00:00

BUILD.bazel

Use a dedicated binary for Bazel schema generation (#58083)

2026-10-29 13:37:06 +00:00

Cargo.toml

Keep credentials out of app-server logs (#39993)

2026-08-21 19:04:32 +00:00

schema_generator.rs

Use a dedicated binary for Bazel schema generation (#58083)

2026-10-29 13:37:06 +00:00