Desktop chat outputs corrupted internal parameter/tool text and gets stuck in Thinking

Description

OpenCode Desktop is showing severely corrupted assistant output during a chat.

Instead of normal assistant text, the chat starts displaying repeated internal-looking strings such as:

parameterparameterparameter...

<commentary.bat>

along with malformed XML/parameter-like content and unexpected Chinese characters.

The agent then remains in the Thinking state and does not properly complete the task. The task panel remains at 0 of 7 todos completed.

This happened while OpenCode was inspecting files and working on a website task. The malformed output appears to be generated/rendered directly into the chat UI rather than being hidden internal tool/agent data.

Expected behavior:
Internal tool/agent protocol data should not be displayed as raw corrupted text. The assistant should continue normally or show a proper error if the model response cannot be parsed.

Actual behavior:
The chat fills with repeated parameter... text and malformed tags, then appears stuck in Thinking.

OS: Windows 11
OpenCode: 1.18.25
Model: Big Pickle
Desktop app: Yes

Plugins

idk i am using opencode gui version

OpenCode version

1.18.25

Steps to reproduce

idk

Screenshot and/or share link

Operating System

windows 11

Terminal

windows

Start by reproducing the corrupted chat output in the OpenCode Desktop app on Windows 11 with version 1.18.25, using the reported website-inspection task if possible. Inspect the chat rendering and assistant-response handling involved when the agent remains in Thinking; done means internal parameter or tool data is hidden, malformed responses produce a proper error, and the task no longer remains stuck.