Add Google provider with generateContent protocol

[aisk]

Adds a Google Gemini provider following the Anthropic provider's pattern: the official google-genai SDK handles transport, and the protocol layer does the message/params translation.

• GoogleProvider (handles google / @ai-sdk/google) with a lazily-created genai.Client, GOOGLE_GENERATIVE_AI_API_KEY/GEMINI_API_KEY/GOOGLE_API_KEY env fallbacks, list_models(), and probe(). google-genai>=2.0.0 ships as the ai[google] extra.
• GoogleGenerateContentProtocol streams via generate_content_stream, mapping text/thought parts, function calls, code-execution parts, inline data, and usage into framework events. thought_signature round-trips through provider metadata so multi-turn function calling works with thinking models.
• Reasoning effort maps to thinking_level on Gemini 3 and to a token budget on earlier models, which reject thinking_level.
• Built-in tool factories: google_search, url_context, code_execution.
• Transport errors are mapped into the provider error hierarchy (the SDK doesn't wrap httpx errors), and safety-blocked prompts raise instead of yielding an empty message.

Verified against the live Gemini API: text, tool-call round-trip, structured output, thinking on 2.5/3, and error mapping.

🤖 Generated with Claude Code

[vercel]

@aisk is attempting to deploy a commit to the Vercel Labs Team on Vercel.

A member of the Team first needs to authorize it.

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	pypi/​google-genai@​2.12.1

View full report