diff --git a/main.py b/main.py
deleted file mode 100644
index 27c02a6..0000000
--- a/main.py
+++ /dev/null
@@ -1,6 +0,0 @@
-def main():
-    print("Hello from roe-python!")
-
-
-if __name__ == "__main__":
-    main()
diff --git a/src/roe/api/agents.py b/src/roe/api/agents.py
index 3c1cfcd..41e6e1e 100644
--- a/src/roe/api/agents.py
+++ b/src/roe/api/agents.py
@@ -109,6 +109,14 @@
 from roe.utils.generated_request import request_json, request_raw
 
 
+_MAX_BATCH_SIZE = 1000
+
+
+def _iter_chunks(items, chunk_size: int):
+    for i in range(0, len(items), chunk_size):
+        yield items[i : i + chunk_size]
+
+
 def _build_run_headers(
     idempotency_key: str | None = None,
     skip_cache: bool = False,
@@ -273,8 +281,6 @@ def delete(self, agent_id: str, version_id: str) -> None:
 class AgentJobsAPI:
     """Nested API for agent job operations."""
 
-    _MAX_BATCH_SIZE = 1000
-
     def __init__(self, agents_api: "AgentsAPI"):
         self._agents_api = agents_api
 
@@ -286,11 +292,6 @@ def _raw(self) -> AuthenticatedClient:
     def _org_id(self) -> UUID:
         return UUID(str(self._agents_api.config.organization_id))
 
-    @staticmethod
-    def _iter_chunks(items, chunk_size: int):
-        for i in range(0, len(items), chunk_size):
-            yield items[i : i + chunk_size]
-
     def list(
         self,
         agent_id: str,
@@ -349,9 +350,7 @@ def retrieve_result(self, job_id: str) -> AgentJobResultResponse:
     def retrieve_status_many(self, job_ids: list[str]) -> list[AgentJobStatus]:
         results: list[AgentJobStatus] = []
         is_first_chunk = True
-        for chunk in self._iter_chunks(job_ids, self._MAX_BATCH_SIZE):
-            if not chunk:
-                continue
+        for chunk in _iter_chunks(job_ids, _MAX_BATCH_SIZE):
             if not is_first_chunk:
                 time.sleep(self._agents_api.config.batch_chunk_delay)
             is_first_chunk = False
@@ -374,9 +373,7 @@ def retrieve_result_many(
     ) -> list[Any]:  # AgentJobResultItem
         results: list[Any] = []
         is_first_chunk = True
-        for chunk in self._iter_chunks(job_ids, self._MAX_BATCH_SIZE):
-            if not chunk:
-                continue
+        for chunk in _iter_chunks(job_ids, _MAX_BATCH_SIZE):
             if not is_first_chunk:
                 time.sleep(self._agents_api.config.batch_chunk_delay)
             is_first_chunk = False
@@ -475,8 +472,6 @@ def delete_data(self, job_id: str) -> AgentJobDeleteDataResponse:
 class AgentsAPI:
     """API for managing and running agents."""
 
-    _MAX_BATCH_SIZE = 1000
-
     def __init__(self, config: RoeConfig, raw_client: AuthenticatedClient):
         self.config = config
         self._raw = raw_client
@@ -495,11 +490,6 @@ def versions(self) -> AgentVersionsAPI:
     def jobs(self) -> AgentJobsAPI:
         return self._jobs
 
-    @staticmethod
-    def _iter_chunks(items, chunk_size: int):
-        for i in range(0, len(items), chunk_size):
-            yield items[i : i + chunk_size]
-
     def list(
         self,
         page: int | None = None,
@@ -666,9 +656,7 @@ def run_many(
         """
         all_job_ids: list[str] = []
         is_first_chunk = True
-        for chunk in self._iter_chunks(batch_inputs, self._MAX_BATCH_SIZE):
-            if not chunk:
-                continue
+        for chunk in _iter_chunks(batch_inputs, _MAX_BATCH_SIZE):
             if not is_first_chunk:
                 time.sleep(self.config.batch_chunk_delay)
             is_first_chunk = False
diff --git a/src/roe/api/policies.py b/src/roe/api/policies.py
index f02c177..024abe4 100644
--- a/src/roe/api/policies.py
+++ b/src/roe/api/policies.py
@@ -7,7 +7,7 @@
 
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Any
+from typing import Any
 from uuid import UUID
 
 from roe._generated.api.policies import (
@@ -57,10 +57,6 @@ def _parse_policy_version(data: dict[str, Any]) -> PolicyVersion:
     return PolicyVersion.from_dict(_normalize_policy_version_wire(data))
 
 
-if TYPE_CHECKING:
-    pass
-
-
 class PolicyVersionsAPI:
     """Nested API for policy version operations."""
 
diff --git a/src/roe/models/job.py b/src/roe/models/job.py
index 3d3fd80..a7ba97a 100644
--- a/src/roe/models/job.py
+++ b/src/roe/models/job.py
@@ -16,6 +16,7 @@
 from roe._generated.models.agent_job_result_response import AgentJobResultResponse
 from roe._generated.models.agent_job_single_status import AgentJobSingleStatus
 from roe._generated.models.agent_job_status import AgentJobStatus
+from roe._generated.types import UNSET
 from roe.exceptions import NotFoundError, RoeAPIException
 
 if TYPE_CHECKING:
@@ -277,7 +278,7 @@ def retrieve_status(self) -> dict[str, AgentJobStatus]:
                     timestamp=cached.get("timestamp", 0),
                     error_message=cached["error_message"]
                     if cached["error_message"] is not None
-                    else _UNSET_SENTINEL(),
+                    else UNSET,
                 )
             else:
                 jobs_to_query.append(job_id)
@@ -298,7 +299,7 @@ def retrieve_status(self) -> dict[str, AgentJobStatus]:
                     created_at=None,
                     last_updated_at=None,
                     timestamp=self._extract_timestamp(status_item),
-                    error_message=err if err is not None else _UNSET_SENTINEL(),
+                    error_message=err if err is not None else UNSET,
                 )
                 self._job_statuses[job_id] = {
                     "status": stat_code,
@@ -348,10 +349,3 @@ def _extract_timestamp(status_item: Any) -> int:
         if isinstance(value, Unset) or value is None:
             return 0
         return int(value)
-
-
-def _UNSET_SENTINEL():  # noqa: N802 — match generated naming style
-    """Return the ``Unset`` sentinel from the generated types module."""
-    from roe._generated.types import UNSET
-
-    return UNSET