diff --git a/src/main/claude/hook-service.ts b/src/main/claude/hook-service.ts
index 587967ec629..bea3d2fe419 100644
--- a/src/main/claude/hook-service.ts
+++ b/src/main/claude/hook-service.ts
@@ -48,7 +48,15 @@ function getManagedScriptPath(): string {
 }
 
 function getManagedCommand(scriptPath: string): string {
-  return process.platform === 'win32' ? scriptPath : `/bin/sh "${scriptPath}"`
+  // Why: on Windows, Claude Code runs hooks through Git Bash (`/usr/bin/bash`).
+  // A path with single backslashes (e.g. `C:\Users\…\claude-hook.cmd`) is
+  // interpreted by bash as a string with escape sequences, so `\U`, `\A`, etc.
+  // collapse and the launcher fails with `command not found`. Emit forward
+  // slashes — Windows accepts them in path arguments and bash leaves them
+  // intact, so the same JSON value works through every shell layer.
+  return process.platform === 'win32'
+    ? scriptPath.replaceAll('\\', '/')
+    : `/bin/sh "${scriptPath}"`
 }
 
 function getManagedScript(): string {