Upgrade @ai-sdk/openai-compatible to 2.x to fix Gemini streaming tool_calls validation error #17902

Description

Problem: When using custom OpenAI-compatible providers that route to Google Gemini, streaming tool_calls fail with
AI_TypeValidationError because Gemini's response omits the index field in tool_call chunks.

The bundled version in v1.2.27 is @ai-sdk/[email protected], which requires index: z.number() (strict).

Fix already exists: @ai-sdk/[email protected] changed it to index: z.number().nullish() with the comment //google
does not send index.

To verify current bundled version:
strings ~/.opencode/bin/opencode | grep -oE 'openai-compatible@[0-9]+.[0-9]+.[0-9]+' | sort -uV

Plugins

No response

OpenCode version

1.2.27

Steps to reproduce

No response

Screenshot and/or share link

Operating System

No response

Terminal

No response