Two different keys record as the same shortcut when a layout puts punctuation on a letter key #35787

What happened

On Linux (Hyprland, Wayland) with a custom XKB layout that puts . on the physical H key, Ctrl+H and Ctrl+. both record as ctrl+. in Settings → Keybindings. The two can't be bound separately. A ctrl+. binding fires on both keys, and on H a ctrl+h binding fires as well.

Diagnosis

Chromium reports:

• physical Ctrl+H: key=".", code=KeyH
• physical Ctrl+.: key=".", code=Period

In packages/shared/src/keybindingMatching.ts, shortcutKeyFromEvent keeps event.key only when it is a letter. Otherwise it maps punctuation event.codes through EVENT_CODE_SHORTCUT_KEYS and falls back to event.key:

• KeyH: . isn't a letter and KeyH isn't a punctuation code, so it falls back to "."
• Period: maps to "."

recordedLayoutShortcutKey records "." for both. resolveEventKeys returns {".", "h"} for KeyH and {"."} for Period, so ctrl+. matches both keys.

The ambiguity comes from mixing two rules: the layout symbol for letters, and the physical key for punctuation. When event.key is punctuation but event.code is Key[A-Z], one option is to record and match by that letter, as resolveEventKeys already adds it for matching. That keeps Colemak and AZERTY (#7995) working.

Steps to reproduce

1. On Linux, use an XKB layout whose base symbol on the physical H key is ., e.g. key <AC06> { [ period, parenright ] }; while <AB09> keeps . reachable.
2. Settings → Keybindings: record a shortcut with Ctrl + physical H. It records ctrl+..
3. Record another with Ctrl + physical .. It also records ctrl+., so the two conflict.

Version

0.1.10-nightly.20261111.4544 (desktop AppImage, commit 1264c20). No changes to the shortcut matching or recording code through main as of 2026-11-13 (nightly 0.1.10-nightly.20261113.4616).

Environment

NixOS, Linux 6.18 x64, Hyprland (Wayland), custom XKB layout (Halmak-based, with a Ctrl/Super level that gives QWERTY symbols), keyd 2.6.0.

Evidence

`keydown` events captured inside T3 Code Desktop, with no key remapping active for the app:

mods=ctrl key="." code=KeyH   keyCode=72
mods=ctrl key="." code=Period keyCode=75
mods=ctrl key="e" code=KeyK   keyCode=69
mods=ctrl key="v" code=KeyC   keyCode=86
mods=ctrl key="c" code=KeyV   keyCode=67

Chromium ignores the layout's Ctrl level for most keys. That part is upstream Chromium behaviour and isn't what this issue asks to fix. The collision between the first two lines happens in T3's own logic.

Related issues

#7995 / PR #4469 (shortcuts now follow layout symbols), #15954 / open PR #24034 (layout map for macOS Option shortcuts; same files, doesn't cover this case), #14833 (German +).

Fix applied or workaround

None.

Filed by

Claude Opus 5.5 (claude-opus-5-5) through T3 Code triage, in Claude Code.