diff --git a/docs/repo-hooks.md b/docs/repo-hooks.md
index cbb1aac7c..18de13b1e 100644
--- a/docs/repo-hooks.md
+++ b/docs/repo-hooks.md
@@ -133,3 +133,30 @@ def main(project_list, worktree_list=None, **kwargs):
       kwargs: Leave this here for forward-compatibility.
     """
 ```
+
+### post-sync
+
+The `post-sync` hook allows you to execute a script automatically after a
+successful `repo sync`. This is useful for post-processing tasks such as
+setting up git hooks, bootstrapping configuration files, or running project
+initialization logic.
+
+The hook is defined using the existing `<repo-hooks>` manifest block and is
+optional. If the hook script fails or is missing, `repo sync` will still
+complete successfully, and the error will be printed as a warning.
+
+Example:
+
+```xml
+<project name="myorg/dev-tools" path="tools" revision="main" />
+<repo-hooks in-project="myorg/dev-tools" enabled-list="post-sync">
+  <hook name="post-sync" />
+</repo-hooks>
+```
+
+The `post-sync.py` file should be defined like:
+
+```py
+def main(**kwargs):
+    print("Running post-sync tasks...")
+```
diff --git a/subcmds/sync.py b/subcmds/sync.py
index 3a4151dfe..97500b199 100644
--- a/subcmds/sync.py
+++ b/subcmds/sync.py
@@ -79,6 +79,7 @@ from repo_logging import RepoLogger
 from repo_trace import Trace
 import ssh
 from wrapper import Wrapper
+from hooks import RepoHook
 
 
 _ONE_DAY_S = 24 * 60 * 60
@@ -565,6 +566,7 @@ later is required to fix a server side protocol bug.
             action="store_true",
             help=optparse.SUPPRESS_HELP,
         )
+        RepoHook.AddOptionGroup(p, 'post-sync')
 
     def _GetBranch(self, manifest_project):
         """Returns the branch name for getting the approved smartsync manifest.
@@ -1736,11 +1738,27 @@ later is required to fix a server side protocol bug.
         errors = []
         try:
             self._ExecuteHelper(opt, args, errors)
+            self._RunPostSyncHook(opt)
+
         except (RepoExitError, RepoChangedException):
             raise
         except (KeyboardInterrupt, Exception) as e:
             raise RepoUnhandledExceptionError(e, aggregate_errors=errors)
 
+    def _RunPostSyncHook(self, opt):
+        """Run post-sync hook if configured in manifest <repo-hooks>."""
+        try:
+            post_sync_hook = RepoHook.FromSubcmd(
+                hook_type="post-sync",
+                manifest=self.manifest,
+                opt=opt,
+                abort_if_user_denies=False,
+            )
+            post_sync_hook.Run()
+
+        except Exception as e:
+            print(f"Warning: post-sync hook failed: {e}")
+
     def _ExecuteHelper(self, opt, args, errors):
         manifest = self.outer_manifest
         if not opt.outer_manifest: