diff --git a/webhook_server/libs/github_api.py b/webhook_server/libs/github_api.py
index 5db4d3a9..61732c88 100644
--- a/webhook_server/libs/github_api.py
+++ b/webhook_server/libs/github_api.py
@@ -45,6 +45,7 @@
 from webhook_server.utils.context import WebhookContext, get_context
 from webhook_server.utils.github_repository_settings import (
     DEFAULT_BRANCH_PROTECTION,
+    get_github_app_slug,
     get_repository_github_app_api,
 )
 from webhook_server.utils.github_retry import github_api_call
@@ -542,28 +543,18 @@ async def process(self) -> Any:
 
         # Initialize app bot login for bot-PR identification (async)
         if not self.app_bot_login:
-            _github_app_api = await github_api_call(
-                get_repository_github_app_api,
-                config_=self.config,
-                repository_name=self.repository_full_name,
-                logger=self.logger,
-                log_prefix=self.log_prefix,
-            )
-            if _github_app_api:
-                try:
-                    self.app_bot_login = await github_api_call(
-                        lambda: _github_app_api.get_user().login,
-                        logger=self.logger,
-                        log_prefix=self.log_prefix,
-                    )
-                except asyncio.CancelledError:
-                    raise
-                except Exception:
-                    self.logger.exception(
-                        f"{self.log_prefix} Failed to get app bot login — bot-PR detection may not work"
-                    )
-            else:
-                self.logger.debug(f"{self.log_prefix} No GitHub App API available — app_bot_login not set")
+            try:
+                _app_slug = await github_api_call(
+                    get_github_app_slug,
+                    self.config,
+                    logger=self.logger,
+                    log_prefix=self.log_prefix,
+                )
+                self.app_bot_login = f"{_app_slug}[bot]"
+            except asyncio.CancelledError:
+                raise
+            except Exception:
+                self.logger.exception(f"{self.log_prefix} Failed to get app bot login — bot-PR detection may not work")
 
         event_log: str = f"Event type: {self.github_event}. event ID: {self.x_github_delivery}"
 
diff --git a/webhook_server/utils/github_repository_settings.py b/webhook_server/utils/github_repository_settings.py
index 5628c9fe..a66ccb65 100644
--- a/webhook_server/utils/github_repository_settings.py
+++ b/webhook_server/utils/github_repository_settings.py
@@ -1,5 +1,6 @@
 import copy
 import os
+import threading
 from collections.abc import Callable
 from concurrent.futures import Future, ThreadPoolExecutor, as_completed
 from copy import deepcopy
@@ -43,6 +44,8 @@
 }
 
 LOGGER = get_logger_with_params()
+_github_app_slug_cache: str | None = None
+_github_app_slug_lock = threading.Lock()
 
 
 def _get_github_repo_api(github_api: github.Github, repository: int | str) -> Repository | None:
@@ -407,15 +410,23 @@ def _set_checkrun_queued(_api: Repository, _pull_request: PullRequest) -> None:
     return True, f"[API user {api_user}] - {repository}: Set check run status to {QUEUED_STR} is done", LOGGER.debug
 
 
-def get_repository_github_app_api(config_: Config, repository_name: str) -> Github | None:
-    LOGGER.debug("Getting repositories GitHub app API")
+def _create_github_integration(config_: Config) -> GithubIntegration:
+    """Create a GithubIntegration instance with App JWT authentication.
 
+    Reads the private key and app ID from config to create an authenticated
+    GithubIntegration. This is the shared setup for all GitHub App API operations.
+    """
     with open(os.path.join(config_.data_dir, "webhook-server.private-key.pem")) as fd:
         private_key = fd.read()
 
     github_app_id: int = config_.root_data["github-app-id"]
     auth: AppAuth = Auth.AppAuth(app_id=github_app_id, private_key=private_key)
-    app_instance: GithubIntegration = GithubIntegration(auth=auth)
+    return GithubIntegration(auth=auth)
+
+
+def get_repository_github_app_api(config_: Config, repository_name: str) -> Github | None:
+    LOGGER.debug("Getting repositories GitHub app API")
+    app_instance = _create_github_integration(config_)
     owner: str
     repo: str
     owner, repo = repository_name.split("/")
@@ -432,19 +443,39 @@ def get_repository_github_app_api(config_: Config, repository_name: str) -> Gith
         return None
 
 
+def get_github_app_slug(config_: Config) -> str:
+    """Get the GitHub App slug using App JWT authentication.
+
+    Returns the app slug (e.g., 'manage-repositories-app').
+    Caches the result at module level since the slug is immutable.
+    Raises on failure so github_api_call() can apply retry/backoff.
+    """
+    global _github_app_slug_cache
+
+    if _github_app_slug_cache is not None:
+        return _github_app_slug_cache
+
+    with _github_app_slug_lock:
+        # Double-checked locking
+        if _github_app_slug_cache is not None:
+            return _github_app_slug_cache
+
+        LOGGER.debug("Getting GitHub App slug")
+        app_instance = _create_github_integration(config_)
+        slug = app_instance.get_app().slug
+        if not slug:
+            raise ValueError("GitHub App returned empty slug")
+        _github_app_slug_cache = slug
+        return _github_app_slug_cache
+
+
 def get_repository_github_app_token(config_: Config, repository_name: str) -> str | None:
     """Get a raw GitHub App installation token string for use with CLI tools.
 
     Returns the token string or None if the app is not configured/installed.
     """
     LOGGER.debug(f"Getting GitHub App installation token for {repository_name}")
-
-    with open(os.path.join(config_.data_dir, "webhook-server.private-key.pem")) as fd:
-        private_key = fd.read()
-
-    github_app_id: int = config_.root_data["github-app-id"]
-    auth: AppAuth = Auth.AppAuth(app_id=github_app_id, private_key=private_key)
-    app_instance: GithubIntegration = GithubIntegration(auth=auth)
+    app_instance = _create_github_integration(config_)
     owner, repo = repository_name.split("/", maxsplit=1)
 
     try: