diff --git a/src/fastcontext/agent/tool/glob.py b/src/fastcontext/agent/tool/glob.py
index 4506346..07cb27d 100644
--- a/src/fastcontext/agent/tool/glob.py
+++ b/src/fastcontext/agent/tool/glob.py
@@ -7,7 +7,7 @@
 
 
 def run(directory: str, pattern: str, cwd: str) -> str:
-    command = [RG_PATH, "--files", directory, "--glob", pattern]
+    command = [RG_PATH, "--files", directory, "--glob", pattern, "--sort", "modified"]
     timeout = 10  # seconds
     try:
         output = subprocess.run(
diff --git a/tests/test_glob_sort.py b/tests/test_glob_sort.py
new file mode 100644
index 0000000..1b3ed22
--- /dev/null
+++ b/tests/test_glob_sort.py
@@ -0,0 +1,25 @@
+import asyncio
+import json
+import os
+import tempfile
+from pathlib import Path
+
+from fastcontext.agent.tool.glob import GlobTool
+
+
+def test_glob_sorts_by_modification_time():
+    """glob.md promises results sorted by modification time. Create files out
+    of mtime order on disk and assert the output is ordered oldest -> newest
+    (rg --sort modified)."""
+    glob = GlobTool()
+    with tempfile.TemporaryDirectory() as cwd:
+        # Create in a deliberately non-mtime order, then stamp mtimes.
+        for name, mtime in [("new.txt", 3000), ("old.txt", 1000), ("mid.txt", 2000)]:
+            p = Path(cwd) / name
+            p.write_text("x", encoding="utf-8")
+            os.utime(p, (mtime, mtime))
+
+        out = asyncio.run(glob.call(json.dumps({"directory": cwd, "pattern": "*.txt"}), cwd=cwd))
+        names = [Path(line).name for line in out.splitlines()]
+
+        assert names == ["old.txt", "mid.txt", "new.txt"], f"expected mtime order, got {names}"