fix(bash): resolved msys drive paths in utility builtins

Normalized utility operands through brush-core's shared shell path resolver so /c and /mnt/c aliases address the live Windows drive. Added Windows-only regression coverage at the Host boundary.

Fixes #8355

crates/pi-builtins/src/host.rs

@@ -119,7 +119,8 @@ impl Host {
 	/// filesystem: the host process's current directory is unrelated to the
 	/// shell's.
 	pub fn resolve(&self, path: impl AsRef<Path>) -> PathBuf {
-		let path = path.as_ref();
+		let normalized_path = brush_core::sys::fs::normalize_shell_path(path.as_ref());
+		let path = normalized_path.as_ref();
 		if path.is_absolute() {
 			path.to_path_buf()
 		} else {
@@ -869,6 +870,14 @@ mod testing {
 		}
 	}
 
+	#[cfg(windows)]
+	#[test]
+	fn resolves_msys_drive_aliases_to_native_drive() {
+		let (host, _) = Host::for_test("test", "", r"C:\workspace");
+
+		assert_eq!(host.resolve("/c/Users/Adam/file.txt"), PathBuf::from(r"C:\Users\Adam\file.txt"));
+	}
+
 	/// Parses `argv` and runs `U` against an in-memory host, mirroring what the
 	/// registered builtin does: `argv[0]` is the command name, clap failures are
 	/// reported the same way, and panics are contained.

packages/coding-agent/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Fixed
+
+- Fixed bash utility builtins resolving MSYS-style `/c/...` paths against a phantom rooted path instead of the live Windows drive, preventing stale reads and lost writes ([#8355](https://github.com/can1357/oh-my-pi/issues/8355)).
+
 ## [17.2.15] - 2026-08-12
 
 ### Added