writeOsc52 broken under GNU screen — uses tmux DCS format, no chunking

[lingfish]

Description

writeOsc52 in packages/opencode/src/cli/cmd/tui/util/clipboard.ts treats GNU screen and tmux the same way, wrapping both in \x1bPtmux;\x1b...\x1b\\. This was originally reported by @valdemardi in #26491 / #26492 (closed before merging).

The tmux; prefix is specific to tmux. Under screen, it is output verbatim alongside the escape sequences. The embedded OSC52 usually still reaches the clipboard (\x1b]52;c;...\x07 is valid enough), but the tmux; garbage and leaked escape sequences corrupt the terminal output and scramble the TUI display.

Screen also has a 768-byte DCS buffer limit (MAXSTR), so clipboard writes larger than ~750 bytes are silently truncated. Screen requires chunking with \x1b\\\x1bP between segments.

Plugins

N/A

OpenCode version

1.15.6

Steps to reproduce

1. Run inside a GNU screen session (STY is set)
2. Try any clipboard copy
3. Text may reach the clipboard but the TUI display gets corrupted with garbage characters and escape artifacts

Screenshot and/or share link

N/A

Operating System

Linux

Terminal

Alacritty and GNU screen v5

[lingfish]

Any chance the associated PR can get looked at?

Polite ping to @kommander

[simonklee]

Thanks reporting. I'll remove the osc52 specific things from openecode shortly and use OpenTUI directly for this. That should solve the issue since we already;

• Distinguishes tmux and GNU Screen.
• Use Screen DCS passthrough without the corrupting tmux; prefix.

[lingfish]

Awesome, thankyou! Let me know if I should just nuke my PR etc or not.