diff --git a/core/python/long-horizon-harness/uv.lock b/core/python/long-horizon-harness/uv.lock
index d75fa19030..f8dea48a19 100644
--- a/core/python/long-horizon-harness/uv.lock
+++ b/core/python/long-horizon-harness/uv.lock
@@ -129,9 +129,9 @@ name = "aiologic"
 version = "0.17.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "sniffio" },
-    { name = "typing-extensions" },
-    { name = "wrapt" },
+    { name = "sniffio", marker = "python_full_version < '3.13'" },
+    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
+    { name = "wrapt", marker = "python_full_version < '3.13'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/f1/7a/d51f2fde1e8ae8a83431f8e97b7a71e9358cdb1d4d2ce6be387fa44d68de/aiologic-0.17.1.tar.gz", hash = "sha256:2e1b93b9e88ced318c2a63ad7b382688f40cbfe40e3d42258d49dc9c5aea179d", size = 252354, upload-time = "2026-06-27T20:41:33.25Z" }
 wheels = [
@@ -572,8 +572,8 @@ name = "culsans"
 version = "0.11.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "aiologic" },
-    { name = "typing-extensions" },
+    { name = "aiologic", marker = "python_full_version < '3.13'" },
+    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/d9/e3/49afa1bc180e0d28008ec6bcdf82a4072d1c7a41032b5b759b60814ca4b0/culsans-0.11.0.tar.gz", hash = "sha256:0b43d0d05dce6106293d114c86e3fb4bfc63088cfe8ff08ed3fe36891447fe33", size = 107546, upload-time = "2025-12-31T23:15:38.196Z" }
 wheels = [
@@ -1991,7 +1991,7 @@ wheels = [
 
 [[package]]
 name = "mcp"
-version = "1.27.1"
+version = "1.28.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "anyio" },
@@ -2009,9 +2009,9 @@ dependencies = [
     { name = "typing-inspection" },
     { name = "uvicorn", marker = "sys_platform != 'emscripten'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/38/83/d1efe7c2980d8a3afa476f4e3d42d53dd54c0ab94c27bee5d755b45c8b73/mcp-1.27.1.tar.gz", hash = "sha256:0f47e1820f8f8f941466b39749eb1d1839a04caddca2bc60e9d46e8a99914924", size = 608458, upload-time = "2026-05-08T16:50:12.601Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/6e/77/9450b8f251a13affb6281997d0523c4615f8a8b35d0b21ff30db3a5aac9d/mcp-1.28.1.tar.gz", hash = "sha256:d51e36a5f5644faea4f85ea649bfffa6bc6c26770d42798ad6a3de3d2ba69683", size = 638501, upload-time = "2026-06-26T12:57:29.093Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/fd/73/42d9596facebdb533b7f0b86c1b0364ef350d1f8ba78b1052e8a58b48b65/mcp-1.27.1-py3-none-any.whl", hash = "sha256:1af3c4203b329430fde7a87b4fcb6392a041f5cb851fd68fc674016ab4e7c06f", size = 216260, upload-time = "2026-05-08T16:50:10.547Z" },
+    { url = "https://files.pythonhosted.org/packages/e2/5e/d118fce19f87a2e7d8101c35c8ae0ec289098a4df0ff244cec23e415aca0/mcp-1.28.1-py3-none-any.whl", hash = "sha256:2726bca5e7193f61c5dde8b12500a6de2d9acf6d1a1c0be9e8c2e706437991df", size = 222620, upload-time = "2026-06-26T12:57:27.218Z" },
 ]
 
 [[package]]