Model selection is "lost" on continuation and Agent selection is "lost" on compaction

[ramarivera]

Description

Okay, so the screenshot in this case is about the model selection. So basically, I think I started the chat with Opus 4.5. Then I ran out of my OpenCodeStandQuota, so I changed to GPT, right? Okay, all good. But then when GPT ends its turn and it has some to-dos, Opus 4.5.0, my OpenCode triggers some kind of auto-prompt and that auto-prompt seems to be switching back the model to the model that was before. I don't know at this point, unfortunately, if it's an Opus 4.5.0, my OpenCode.0 thing that it will switch to the model or if it's an OpenCode.0. But yeah, I'm reporting it just in case.

Sorry for the ramblings and the typos, my hand is a bit fucked up and I'm using speech-to-text.

Then for the compaction issue, I think it's much simpler to reproduce. So basically you have to be in plan mode, then run into compaction, and after compaction, even if the UI claims to be still in plan mode, if you ask the agent to do some non-plan-mode action like write files or whatever, it will do it and it will not claim that it has read-only permissions or similar.

Plugins

And the gravity out of my open code, a custom plugin to just to insert the model name as a synthetic message and not a lot more than that, honestly.

OpenCode version

1.1.18

Steps to reproduce

Spoken in the first text box.

Screenshot and/or share link

https://opncd.ai/share/I7Lx4EUD

Operating System

macOS

Terminal

Ghostty + Zellij

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• Model switches back to the original selection after prompting #4281: Model switches back to the original selection after prompting
• Plugins using noReply seem to cause model to switch to agent default  #4475: Plugins using noReply seem to cause model to switch to agent default
• ACP loadSessionMode doesn't restore persisted model/agent from session messages #7804: ACP loadSessionMode doesn't restore persisted model/agent from session messages
• Wrong agent used after compaction #4546: Wrong agent used after compaction
• Compaction does not work after changing models sometimes #6474: Compaction does not work after changing models sometimes
• TUI: User selected agent/model is overwritten by server defaults when creating a new session #7948: TUI: User selected agent/model is overwritten by server defaults when creating a new session

Feel free to ignore if none of these address your specific case.