diff --git a/recipes/recipe_proto/turboci/README.md b/recipes/recipe_proto/turboci/README.md
new file mode 100644
index 0000000000..b221686c33
--- /dev/null
+++ b/recipes/recipe_proto/turboci/README.md
@@ -0,0 +1,3 @@
+Generated by update.py. DO NOT EDIT.
+These protos were copied from:
+https://chromium.googlesource.com/infra/turboci/proto/+/0e5449fab915537e38bcc2e7fae25d54614d7c78/turboci/data/chrome/depot_tools
diff --git a/recipes/recipe_proto/turboci/data/chrome/depot_tools/v1/bot_update_results.proto b/recipes/recipe_proto/turboci/data/chrome/depot_tools/v1/bot_update_results.proto
new file mode 100644
index 0000000000..e2c3a82732
--- /dev/null
+++ b/recipes/recipe_proto/turboci/data/chrome/depot_tools/v1/bot_update_results.proto
@@ -0,0 +1,35 @@
+// Copyright 2025 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+syntax = "proto3";
+package turboci.data.chrome.depot_tools.v1;
+
+option go_package = "go.chromium.org/turboci/proto/go/data/chrome/depot_tools/v1;depot_toolspb";
+option java_multiple_files = true;
+
+// BotUpdateResults provides details about all of the repositories that were
+// checked out. bot_update checks out one or more repositories to a common
+// directory, each of which can have have additional repos checked out either
+// via DEPS files or submodules and so on recursively. Any repo in the tree can
+// have its revision overridden.
+message BotUpdateResults {
+  // Information about the commit checked out for a repo (ignoring any patch
+  // applied).
+  message GitCommit {
+    // GoB host without the ".googlesource.com" hostname suffix as the
+    // suffix may be different depending on how it's accessed (eg.
+    // ".git.corp.google.com") while still referring to the same repo.
+    optional string host = 1;
+    // Repository name on the host, e.g. "chromium/src".
+    optional string project = 2;
+    // Commit ID (eg. HEX SHA1).
+    optional string id = 3;
+  }
+
+  // The revision information for all git repos that bot_update checked out. The
+  // key is the path from the common directory where the checkout was performed,
+  // with the value providing information about the repository and revision that
+  // was checked out.
+  map<string, GitCommit> manifest = 1;
+}
diff --git a/recipes/recipe_proto/turboci/update.py b/recipes/recipe_proto/turboci/update.py
new file mode 100755
index 0000000000..b750ab9c5d
--- /dev/null
+++ b/recipes/recipe_proto/turboci/update.py
@@ -0,0 +1,95 @@
+#!/usr/bin/env vpython3
+# Copyright 2025 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+"""Automatically updates the .proto files in this directory."""
+
+import json
+import os
+import re
+import tarfile
+
+from pathlib import Path
+
+import requests
+
+BASE_URL = 'https://chromium.googlesource.com/infra/turboci/proto'
+LOG_URL = BASE_URL + '/+log/main/{}?format=JSON&n=1'
+TAR_URL = BASE_URL + '/+archive/{}/{}.tar.gz'
+
+REPO_PATH = 'turboci/data/chrome/depot_tools'
+
+
+def print_commit_message(prev_commit: str, target: str):
+  print('{0:=^80}'.format(' START[Commit Message] '))
+  print('[TurboCI] Import latest protos.')
+  print()
+  changelog = f'{BASE_URL}/+log/{prev_commit}..{target}'
+  print(f'Changelog: {changelog}')
+  print()
+  clog = json.loads(requests.get(f'{changelog}?format=JSON').text[4:])
+  for commit in clog['log']:
+    first_line = commit['message'].split('\n')[0]
+    print(f'{commit["commit"][:8]} {first_line}')
+  print()
+  print('{0:=^80}'.format(' END[Commit Message] '))
+
+
+def main():
+  """Automatically updates the .proto files in this directory."""
+  this_dir = Path(__file__).parent
+
+  readme_path = this_dir / 'README.md'
+
+  with open(readme_path, 'r') as rmd:
+    prev_commit = re.match(r'.*/([a-f0-9]{40})/.*', rmd.read(),
+                           re.MULTILINE | re.DOTALL).group(1)
+
+  to_remove = set()
+  for root, _, files in os.walk(this_dir):
+    for file in files:
+      if file.endswith('.proto'):
+        to_remove.add(Path(root) / file)
+
+  resp = requests.get(LOG_URL.format(REPO_PATH))
+  target = str(json.loads(resp.text[4:])['log'][0]['commit'])
+
+  if prev_commit == target:
+    print('Nothing to update.')
+    return
+
+  print(f'Updating to {target!r}')
+
+  base_dir = this_dir.parent / REPO_PATH
+  resp = requests.get(TAR_URL.format(target, REPO_PATH), stream=True).raw
+  with tarfile.open(mode='r', fileobj=resp) as tar:
+    for item in tar:
+      if not item.name.endswith('.proto'):
+        continue
+      if item.name.endswith('_test.proto'):
+        print(f'Skipping {item.name!r}')
+        continue
+      if 'internal' in item.name or 'googleapis' in item.name:
+        print(f'Skipping {item.name!r}')
+        continue
+      print(f'Extracting {item.name!r}')
+      tar.extract(item, path=base_dir)
+      to_remove.discard(base_dir / item.name)
+
+  if to_remove:
+    print('Removing stale proto')
+    for file in to_remove:
+      os.remove(file)
+
+  with open(readme_path, 'w') as rmd:
+    print('Generated by update.py. DO NOT EDIT.', file=rmd)
+    print('These protos were copied from:', file=rmd)
+    print(f'{BASE_URL}/+/{target}/{REPO_PATH}', file=rmd)
+
+  print_commit_message(prev_commit, target)
+
+  print('Done.')
+
+
+if __name__ == '__main__':
+  main()