fix: fix misc windows issues (#323)

Co-authored-by: Letta <noreply@letta.com>

src/tools/impl/ApplyPatch.ts

@@ -155,7 +155,8 @@ export async function apply_patch(
 
     try {
       const buf = await fs.readFile(abs, "utf8");
-      return buf;
+      // Normalize line endings to LF for consistent matching (Windows uses CRLF)
+      return buf.replace(/\r\n/g, "\n");
     } catch (error) {
       const err = error as NodeJS.ErrnoException;
       if (err.code === "ENOENT") {

src/tools/impl/Edit.ts

@@ -29,7 +29,9 @@ export async function edit(args: EditArgs): Promise<EditResult> {
       "No changes to make: old_string and new_string are exactly the same.",
     );
   try {
-    const content = await fs.readFile(resolvedPath, "utf-8");
+    const rawContent = await fs.readFile(resolvedPath, "utf-8");
+    // Normalize line endings to LF for consistent matching (Windows uses CRLF)
+    const content = rawContent.replace(/\r\n/g, "\n");
     const occurrences = content.split(old_string).length - 1;
     if (occurrences === 0)
       throw new Error(

src/tools/impl/MultiEdit.ts

@@ -42,7 +42,9 @@ export async function multi_edit(
       );
   }
   try {
-    let content = await fs.readFile(resolvedPath, "utf-8");
+    const rawContent = await fs.readFile(resolvedPath, "utf-8");
+    // Normalize line endings to LF for consistent matching (Windows uses CRLF)
+    let content = rawContent.replace(/\r\n/g, "\n");
     const appliedEdits: string[] = [];
     for (let i = 0; i < edits.length; i++) {
       const edit = edits[i];

src/tools/impl/shellLaunchers.ts

@@ -17,12 +17,10 @@ function windowsLaunchers(command: string): string[][] {
   if (!trimmed) return [];
   const launchers: string[][] = [];
   const seen = new Set<string>();
-  const envComSpecRaw = process.env.ComSpec || process.env.COMSPEC;
-  const envComSpec = envComSpecRaw?.trim();
-  if (envComSpec) {
-    pushUnique(launchers, seen, [envComSpec, "/d", "/s", "/c", trimmed]);
-  }
-  pushUnique(launchers, seen, ["cmd.exe", "/d", "/s", "/c", trimmed]);
+
+  // Default to PowerShell on Windows (same as Gemini CLI and Codex CLI)
+  // This ensures better PATH compatibility since many tools are configured
+  // in PowerShell profiles rather than system-wide cmd.exe PATH
   pushUnique(launchers, seen, [
     "powershell.exe",
     "-NoProfile",
@@ -30,6 +28,15 @@ function windowsLaunchers(command: string): string[][] {
     trimmed,
   ]);
   pushUnique(launchers, seen, ["pwsh", "-NoProfile", "-Command", trimmed]);
+
+  // Fall back to cmd.exe if PowerShell fails
+  const envComSpecRaw = process.env.ComSpec || process.env.COMSPEC;
+  const envComSpec = envComSpecRaw?.trim();
+  if (envComSpec) {
+    pushUnique(launchers, seen, [envComSpec, "/d", "/s", "/c", trimmed]);
+  }
+  pushUnique(launchers, seen, ["cmd.exe", "/d", "/s", "/c", trimmed]);
+
   return launchers;
 }