diff --git a/scripts/metrics/repo.py b/scripts/metrics/repo.py
new file mode 100755
index 0000000..5d29155
--- /dev/null
+++ b/scripts/metrics/repo.py
@@ -0,0 +1,81 @@
+#!/usr/bin/env python3
+# Copyright 2019 Google LLC
+#
+# Licensed under the the Apache License v2.0 with LLVM Exceptions (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://llvm.org/LICENSE.txt
+#
+# 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.
+
+import datetime
+from time import timezone
+import git
+from typing import Dict
+from google.cloud import monitoring_v3
+
+from datetime import tzinfo
+
+GCP_PROJECT_ID = 'llvm-premerge-checks'
+
+class RepoStats:
+
+    def __init__(self):
+        self.commits = 0  # type: int
+        self.reverts = 0  # type: int
+
+    @property
+    def percent_reverted(self) -> float:
+        return 100.0 * self.reverts / self.commits
+
+    def __str__(self):
+        return "\n".join([
+            "commits: {}".format(self.commits),
+            "reverts: {}".format(self.reverts),
+            "percent reverted: {:0.1f}".format(self.percent_reverted),
+            ])
+
+def get_reverts_per_day(repo_path: str, max_age: datetime.datetime) -> RepoStats:
+    stats = RepoStats()
+    repo = git.Repo(repo_path)
+    repo.git.fetch()
+    for commit in repo.iter_commits('master'):
+        if commit.committed_datetime < max_age:
+            break
+        stats.commits += 1
+        if commit.summary.startswith('Revert'):
+            stats.reverts += 1
+    return stats
+
+
+def gcp_write_data(project_id: str, stats: RepoStats, now:datetime.datetime):
+    """Upload metrics to Stackdriver."""
+    client = monitoring_v3.MetricServiceClient()
+    project_name = client.project_path(project_id)
+
+    for desc_type, value in [
+        ["reverts", stats.reverts],
+        ["commits", stats.commits],
+        ["percent_reverted", stats.percent_reverted],
+    ]:
+        series = monitoring_v3.types.TimeSeries()
+        series.metric.type = 'custom.googleapis.com/repository_{}'.format(desc_type)
+        series.resource.type = 'global'
+        point = series.points.add()
+        point.value.double_value = value
+        point.interval.end_time.seconds = int(now.timestamp())
+        client.create_time_series(project_name, [series])
+
+
+if __name__ == '__main__':
+    now = datetime.datetime.now(tz=datetime.timezone.utc)
+    max_age = now - datetime.timedelta(days=1)
+    # TODO: make path configurable
+    stats = get_reverts_per_day('~/git/llvm-project', max_age)
+    print(stats)
+    gcp_write_data(GCP_PROJECT_ID, stats, now)
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