temperature not sent in request body for custom OpenAI-compatible provider #25755

Description

When using a custom @ai-sdk/openai-compatible provider, the temperature parameter configured in agent frontmatter or in opencode.json under agent is never included in the /v1/chat/completions request body.

Verified with tcpdump on lo:8080 — no temperature field appears regardless of:

frontmatter temperature: 0.3 in agent .md file
"agent": { "review": { "temperature": 0.3 } } in opencode.json
model name (tested with qwen3-moe-thinking and neutral alias review-agent)
Works with: Anthropic provider (per official docs example)

Config: custom provider via @ai-sdk/openai-compatible, baseURL: http://localhost:8080/v1

Plugins

No response

OpenCode version

1.14.33

Steps to reproduce

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Screenshot and/or share link

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Operating System

Arch Linux

Terminal

No response