Mouse scroll not working in MobaXterm/PuTTY SSH sessions (alt-screen mode)

[nishikantnayak]

Environment

• Copilot CLI version: 1.0.32
• Terminal: MobaXterm (SSH session to Linux host)
• TERM: xterm-color
• OS: RHEL/CentOS (remote host)

Problem

Mouse scroll does not work for browsing conversation history in the Copilot CLI session when connected via MobaXterm (SSH). The terminal supports mouse events correctly — scroll and paste work fine in the normal bash shell. The issue is specific to the Copilot CLI's alt-screen TUI.

Current behavior

Config setting	Scroll	Paste
"mouse": true	❌ Not working	❌ Broken (corrupted text)
"mouse": false	❌ Not working	✅ Works

Only PgUp/PgDn keys work for scrolling conversation history.

Expected behavior

With "mouse": true, mouse wheel scroll should navigate the conversation history within the CLI's alt-screen buffer, similar to how it works in other TUI applications (e.g., less, vim).

Notes

• The changelog for v1.0.14 mentions "Pasted text is no longer corrupted when mouse support is active" — this fix does not appear to work with MobaXterm/PuTTY terminals.
• The terminal correctly supports SGR mouse encoding (\e[?1006h succeeds).
• Normal terminal scrollback works fine outside the Copilot CLI session.
• This was reportedly working ~1 month ago (around v1.0.7 timeframe) before a subsequent update broke it.

Workaround

Keep "mouse": false in ~/.copilot/config.json and use PgUp/PgDn for scrolling.