fix: force temperature=1 when thinking is enabled or adaptive

[mateusz28011]

Summary

• Fixes temperature may only be set to 1 when thinking is enabled or in adaptive mode API error
• The bridge auto-injects thinking: { type: "adaptive" } for non-Haiku models, but forwards the original temperature value unchanged — Anthropic rejects any value other than 1 (or omitted) when thinking is active

Change

After the existing thinking injection block in the fetch wrapper, adds a guard that forces temperature = 1 when:

• thinking.type is "enabled" or "adaptive", AND
• temperature is explicitly set to something other than 1

If temperature is not present in the body at all, it is left untouched (the API defaults to 1).

Testing

Verified on OpenCode 1.2.27 with Claude Sonnet 4.6 via OAuth — the error no longer occurs.

Reference

https://docs.claude.com/en/docs/build-with-claude/extended-thinking#important-considerations-when-using-extended-thinking

[dotCipher]

Thanks @mateusz28011 — verified this against the API. temperature=0.5 with thinking=adaptive returns a clear 400: "temperature may only be set to 1 when thinking is enabled or in adaptive mode". The guard is clean and correctly scoped (only forces when temperature is explicitly set to non-1). Merging.

[dotCipher]

Released in v1.5.0. Upgrade: cd ~/.cache/opencode && npm install opencode-claude-bridge@latest