Backport: chore(provider/xai): deprecate searchParameters (live search) in favor of web_search/x_search tools#15718
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…r of web_search/x_search tools (#15713) ## background xAI has deprecated Live Search. the `search_parameters` field on chat completions now returns `410 Gone` with: > `Live search is deprecated. Please switch to the Agent Tools API: https://docs.x.ai/docs/guides/tools/overview` verified live against `api.x.ai` across grok-4.3 / grok-3-latest and all search modes. through the SDK the option is broken either way: - `xai.chat(modelId)` → serializes `search_parameters`, xAI returns `410 Gone` - `xai(modelId)` / `xai.responses(modelId)` → the responses model never read `searchParameters`, so it is silently dropped and no search runs (a no-op) so the option is non-functional on every path. the working replacement is the `web_search` / `x_search` agent tools on the responses endpoint, already supported via `xai.tools.webSearch()` / `xai.tools.xSearch()`. ## summary - mark `searchParameters` as `@deprecated` in `xai-chat-language-model-options.ts`, pointing users to `xai.tools.webSearch()` / `xai.tools.xSearch()` with `xai.responses(modelId)`. follows the same JSDoc-on-zod-field convention already used in the file (`xHandles`) and other providers (black-forest-labs, google interactions) - the serialization is intentionally left in place (no breaking change) — the option still exists, it's just flagged - remove the two now-dead example files (`generate-text/xai/search.ts`, `stream-text/xai/search.ts`). they used the default `xai()` callable (responses), so they were silently no-op'ing even before the deprecation. their replacements already exist: `responses-web-search.ts`, `web-search-image-understanding.ts`, `x-search-video-understanding.ts` ## verification - raw curl: `search_parameters` returns `410` on grok-4.3 / grok-3-latest, modes `auto` and `on` - via SDK: `xai.chat(...)` with `searchParameters` → `410 Gone`; `xai(...)` (responses) → option silently dropped (no `search_parameters` in request body) - replacement examples run live against xAI and return real cited results (`responses-web-search.ts`, `web-search-image-understanding.ts`) - xai package tests pass, type-check and build clean ## related - #12827
aayush-kapoor
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May 30, 2026
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This is an automated backport of #15713 to the release-v6.0 branch. FYI @dancer