Add xAI Responses API provider with web search#16
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New provider/xai package implementing forge.Provider via the modern xAI Responses API. Supports built-in server-side tools (web search, X search) with domain/handle filtering, native function calling with flat tool definitions, and citation extraction from inline annotations. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
provider/xai/package implementingforge.Providervia the xAI Responses APIxai.WithWebSearch()andxai.WithXSearch()with domain/handle filteringurl_citationannotations — accessible viaprovider.LastCitations()xai-searchprovider optionTest plan
go vet ./...— cleango test ./...— all 45 tests pass (38 existing + 7 new)grok-4-1-fast-non-reasoning+ web search — returns rich results with 13+ citations🤖 Generated with Claude Code