[BUG] Thinking models (e.g. kimi-k2-thinking) fail with Reasoning is mandatory via Kilo Gateway

[cbrunnkvist]

Description

Some thinking models like kimi-k2-thinking fail when invoked via the Kilo Gateway with the error:

Reasoning is mandatory for this endpoint and cannot be disabled.

This affects:

• kimi-k2-thinking (and potentially other -thinking suffix models) via @kilocode/kilo-gateway

Expected Behavior

Thinking models should work out of the box without requiring manual reasoning toggle.

Root Cause

The ProviderTransform.options() function in packages/opencode/src/provider/transform.ts was not adding reasoning: { enabled: true } for thinking models accessed via Kilo Gateway.

Fix

Add logic to automatically enable reasoning for models that:

1. Use @kilocode/kilo-gateway SDK
2. Have reasoning capability
3. Have "thinking" in their model ID

[github-actions]

This issue might be related to existing issues. Please check:

• Kimi K2.5 - Fails with Kilo Gateway #5433: Kimi K2.5 - Fails with Kilo Gateway (similar reasoning error via Gateway)
• kimi k2.5 powerful only when u allow him to work with COT #5454: kimi k2.5 powerful only when u allow him to work with COT (related thinking model issues)
• Thinking blocks remain visible after response completes when using Kilo Gateway provider #6320: Thinking blocks remain visible after response completes when using Kilo Gateway provider (related to same provider)