Numpad keys not working when running inside VS Code 1.110 integrated terminal

[ErcinDedeoglu]

Description

Numpad keys (0-9, Enter, decimal, operators) are completely ignored by OpenCode's TUI when running inside VS Code 1.110.0's integrated terminal. The numpad works correctly in the terminal shell before launching OpenCode, and works correctly when running OpenCode in an external terminal.

Environment

• OpenCode version: 1.2.17 (also tested with 1.2.15, same issue)
• VS Code Version: 1.110.0 (Electron 39.6.0, Chromium 142.0.7444.265)
• OS: Windows (connecting via Remote SSH to Ubuntu ARM64)
• Terminal: VS Code integrated terminal

Steps to Reproduce

1. Open VS Code 1.110.0 integrated terminal
2. Verify numpad works in the shell (it does)
3. Launch opencode
4. Try typing numbers using the numpad
5. Observe: numpad keystrokes are completely ignored

Expected Behavior

Numpad keys should produce the same input as the main keyboard number row.

Actual Behavior

• Numpad keys are silently dropped inside OpenCode's TUI
• Main keyboard number row works correctly
• Numpad works in the terminal before launching OpenCode
• Numpad works when running OpenCode in an external terminal (outside VS Code)
• Issue occurs on both OpenCode 1.2.15 and 1.2.17

Analysis

VS Code 1.110.0 updated to Electron 39 / Chromium 142, which has a known regression where numpad keys report key: "Unidentified" in key events (Chromium issues 405793116, 429730008).

The normal terminal shell compensates via keyCode fallback, but when OpenCode's opentui activates enhanced keyboard mode (Kitty keyboard protocol / CSI u), xterm.js passes the broken key identity through. OpenCode's TUI receives unidentifiable key events for numpad keys and drops them.

This was not an issue prior to VS Code 1.110.0.

Related Issues

• Number keys from QMK keyboard layer ignored in TUI input #8664 - Number keys from QMK keyboard layer ignored in TUI input
• Impossible to type numbers on a French AZERTY keyboard #10577 - Impossible to type numbers on a French AZERTY keyboard
• [Bug] Numeric input ignored in WezTerm (but works in Kitty) — Ubuntu 25.10 / Wayland #11325 - Numeric input ignored in WezTerm
• VS Code issue: microsoft/vscode#299374
• VS Code issue: microsoft/vscode#283460

[Magneticdud]

This problem of the numpad not working also happens with Alactritty on (Fedora) Linux. With GNOME terminal or with kitty, the numpad works

[GeneratedRandomly]

same under opencode 1.2.23, vscode 1.111.0, WSL2-ubuntu 22.04

[mkdgs]

Same here on debian trixie, opencode 1.2.24 and vscode 1.111.0 . That appear after apt update, so seems to be a vscode related change.

[ACCSCI]

Same here on Ubuntu 24.04.4 LTS, vscode 1.111.0,opencode extension 0.0.13，opencode 1.2.24

[aborruso]

same under opencode 1.2.26, vscode 1.111.0, WSL2 (Pengwin 12/bookworm). numpad is disabled for me too.

[mcpbay]

Same under OpenCode 1.2.27, VSCode 1.112.0, WSL.

[dgsosa]

Same under OpenCode 1.3.0, VSCode 1.112.0 on Windows 11.
under integrated terminal, and under extension (v 0.0.13 )