DeepSeek API requires reasoning_content but opencode does not preserve or forward it #5332

Description

I've been using Deepseek Reasoner for a while to make improvements to an Astro project. When I got to about 50% of the context, I got the following error.

Missing reasoning_content field in the assistant message at message index 241. For more information, please refer to https://api-docs.deepseek.com/guides/thinking_mode#tool-calls

OpenCode version

OpenCode 1.0.141

Steps to reproduce

1- Use deepseek reasoner
2- use more than 50% of context

Screenshot and/or share link

No response

Operating System

Arch Linux

Terminal

Kitty