diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 000000000..fe3dad05f
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,22 @@
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Include Markdown files in GitHub's file statistics for this repo.
+*.md linguist-detectable
+
+# Exclude config files from GitHub's file statistics. GitHub's Linguist already
+# recognizes most config files as data; this adds some it doesn't.
+.gemini/**             linguist-documentation
+.git-blame-ignore-revs linguist-documentation
+.markdownlintrc        linguist-documentation