init claude-code

utils/modifiers.ts

@@ -0,0 +1,36 @@
+export type ModifierKey = 'shift' | 'command' | 'control' | 'option'
+
+let prewarmed = false
+
+/**
+ * Pre-warm the native module by loading it in advance.
+ * Call this early to avoid delay on first use.
+ */
+export function prewarmModifiers(): void {
+  if (prewarmed || process.platform !== 'darwin') {
+    return
+  }
+  prewarmed = true
+  // Load module in background
+  try {
+    // eslint-disable-next-line @typescript-eslint/no-require-imports
+    const { prewarm } = require('modifiers-napi') as { prewarm: () => void }
+    prewarm()
+  } catch {
+    // Ignore errors during prewarm
+  }
+}
+
+/**
+ * Check if a specific modifier key is currently pressed (synchronous).
+ */
+export function isModifierPressed(modifier: ModifierKey): boolean {
+  if (process.platform !== 'darwin') {
+    return false
+  }
+  // Dynamic import to avoid loading native module at top level
+  const { isModifierPressed: nativeIsModifierPressed } =
+    // eslint-disable-next-line @typescript-eslint/no-require-imports
+    require('modifiers-napi') as { isModifierPressed: (m: string) => boolean }
+  return nativeIsModifierPressed(modifier)
+}