The chord matcher couldn't represent a bare or double-tapped modifier:
KeyChord.parse required a base key, so `shift shift` failed, and JetBrains
"Search Everywhere" (double-Shift) was unbindable.
Design decision: search-everywhere aliases clide's existing quick-open
finder (not a new overlay) — bound across all four presets per the user.
Changes:
- KeyChord: a bare modifier name (`shift`, `ctrl`, `cmd`, …) parses as a
modifier-free chord on that modifier's logical key, so parseSequence(
'shift shift') yields a two-chord double-tap. Adds KeyChord.bareModifier
and modifierForLogicalKey.
- ModifierTapTracker: headless, clock-injected double-tap detector. A bare
modifier never forms a single chord; an intervening key breaks the gesture.
- app.dart global handler feeds bare-modifier KeyDowns to the tracker and,
on a double-tap, resolves the 2-chord sequence via the new
KeymapService.resolveSequence. The existing single-chord path is untouched
(zero behavioural risk to normal keys).
- Presets: default/vim/vscode/jetbrains add `shift shift` → quickOpen.open.
jetbrains header updated (the gesture is now expressible).
Tests: bare-modifier parse/equality/round-trip; tracker window/reset/
different-modifier/consume; each shipped preset resolves double-Shift to
QuickOpenIntent.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>