panic: interface conversion: opencode.PartUnion is opencode.StepStartPart, not opencode.ToolPart #2059

panic: interface conversion: opencode.PartUnion is opencode.StepStartPart, not opencode.ToolPart

Version: v0.5.7
OS: Linux
Terminal: Ghostty 1.1.3-arch1

Sorry, this will not be the best bug report as I'm not sure what's going on. I've been giving the Backlog.md tool a trial run and as part of it have configured a custom "backlog" subagent using the agent prompt they have for Claude Code.

The above panic log is all I have to go on at the moment. There was a bit more context dumped to the terminal, but I had some difficulty trying to capture it. As I've tried to scroll when selecting the text, my shell history scrolled instead? Unsure what's going on but the panic has happened twice and both times it scrolls the shell history instead of the terminal window.

I've tried to reproduce it again, but have been unsuccessful. If it pops up again, I'll try and capture as much of the text of the panic as I can.