Desktop client freezes when agent performs screenshot verification with non-vision model; rollback does not recover

Description

When using a non-vision model, if the agent autonomously takes a screenshot for verification during task execution, the client freezes. Rolling back the conversation does not resolve the issue — the agent still attempts to process the screenshot with the same model and hangs repeatedly.

Plugins

No response

OpenCode version

v1.18.22

Steps to reproduce

Select a text-only model (no vision support).

Assign the agent a task that requires it to take a screenshot for verification (e.g., UI validation, visual check).

Agent captures a screenshot and attempts to send it to the model → client freezes.

Roll back the conversation → agent retries the same step → freezes again.

Screenshot and/or share link

Operating System

windows 10

Terminal

windows Terminal