opencode desktop attachments not working report #50173

Description

Summary

In the opencode desktop app, attaching files or images via the attach button in the message input does not work — the attachment always fails and a generic "failed" error message is shown. This makes it impossible to share files or screenshots with the agent from the desktop UI.

Environment

• opencode version: 2.0.11
• OS: Windows 11 Pro 10.0.26200 (win32 x64)
• Terminal: Unavailable: desktop app (no terminal environment)
• Shell: C:\Windows\system32\cmd.exe
• Install/channel: latest (release)
• Active plugins: None found in config

Reproduction

1. Open the opencode desktop app on Windows.
2. Start (or open) a session and focus the message input.
3. Click the attach button and select a file or image (e.g. a PNG).
4. Observe: a generic "failed" error message is shown and the file is never attached to the message.

Expected Behavior

The selected file/image should be attached to the message input and sent with the prompt.

Actual Behavior

A generic error message appears (no specific wording/details) and the attachment is rejected. The issue reproduces consistently when using the attach button.

Additional Context

• Reproduced via the attach button in the input; paste and drag & drop were not tested by the reporter.
• No workaround found; the same files can be referenced manually in text, but that is not equivalent for images.
• Happy to provide logs or a screen recording if that helps narrow it down.

Plugins

no

OpenCode version

2.0.11

Steps to reproduce

No response

Screenshot and/or share link

No response

Operating System

windows 11 64bit

Terminal

No response