fix: sort glob results for deterministic file order

fast-glob returns files in arbitrary filesystem traversal order, which
varies across runs. This caused the bash tool description (which lists
available files) to differ between calls with the same directory,
breaking prompt cache hits.

Sort the results from both `streamFiles` and `getFilePaths` so the
file list is always in stable lexicographic order.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: Jose Mussa

src/files/loader.ts

@@ -38,12 +38,14 @@ export async function* streamFiles(
     const { source, include = "**/*" } = options.uploadDirectory;
     const absoluteSource = path.resolve(source);
 
-    const foundPaths = await fg(include, {
-      cwd: absoluteSource,
-      dot: true,
-      onlyFiles: true,
-      ignore: ["**/node_modules/**", "**/.git/**"],
-    });
+    const foundPaths = (
+      await fg(include, {
+        cwd: absoluteSource,
+        dot: true,
+        onlyFiles: true,
+        ignore: ["**/node_modules/**", "**/.git/**"],
+      })
+    ).sort();
 
     for (const relativePath of foundPaths) {
       if (yieldedPaths.has(relativePath)) {
@@ -69,12 +71,14 @@ export async function getFilePaths(
     const { source, include = "**/*" } = options.uploadDirectory;
     const absoluteSource = path.resolve(source);
 
-    const foundPaths = await fg(include, {
-      cwd: absoluteSource,
-      dot: true,
-      onlyFiles: true,
-      ignore: ["**/node_modules/**", "**/.git/**"],
-    });
+    const foundPaths = (
+      await fg(include, {
+        cwd: absoluteSource,
+        dot: true,
+        onlyFiles: true,
+        ignore: ["**/node_modules/**", "**/.git/**"],
+      })
+    ).sort();
     paths.push(...foundPaths);
   }