--- title: "langsmith Breaking Changes on PyPI | Since.dev" description: "What each langsmith release removed, renamed or changed: 226 breaking changes in 57 versions on PyPI, each with its source." canonical_url: https://since.dev/packages/pypi/langsmith last_updated: 2026-06-18 --- # langsmith breaking changes Every breaking API change we have recorded in langsmith on PyPI: 226 breaking changes in 57 versions. Below are its newest 6 versions, removals and renames first, each with its source. Newest change June 18, 2026 ## 0.8.17 4 breaking changes, first published June 18, 2026. - **Removed** `langsmith.sandbox.aws_auth_proxy_config` langsmith.sandbox.aws_auth_proxy_config was removed in langsmith 0.8.17 [pypi.org](https://pypi.org/project/langsmith/0.8.17/) - **Signature changed** `langsmith.AsyncClient.__init__` Was def \_\_init\_\_(self, api_url: Optional\[str\] = None, api_key: Optional\[str\] = None, timeout_ms: Optional\[Union\[int, tuple\[Optional\[int\], Optional\[int\], Optional\[int\], Optional\[int\]\]\]\] = None, retry_config: Optional\[Mapping\[str, Any\]\] =... [pypi.org](https://pypi.org/project/langsmith/0.8.17/) - **Signature changed** `langsmith.sandbox.SandboxClient.create_sandbox` Was def create_sandbox(self, snapshot_id: Optional\[str\] = None, \*, snapshot_name: Optional\[str\] = None, name: Optional\[str\] = None, timeout: int = 30, wait_for_ready: bool = True, idle_ttl_seconds: Optional\[int\] = None... [pypi.org](https://pypi.org/project/langsmith/0.8.17/) - **Signature changed** `langsmith.sandbox.SandboxClient.sandbox` Was def sandbox(self, snapshot_id: Optional\[str\] = None, \*, snapshot_name: Optional\[str\] = None, name: Optional\[str\] = None, timeout: int = 30, idle_ttl_seconds: Optional\[int\] = None, delete_after_stop_seconds: Optional\[int\] = None, vcpus... [pypi.org](https://pypi.org/project/langsmith/0.8.17/) ## 0.8.15 1 breaking change, first published June 12, 2026. - **Signature changed** `langsmith.sandbox.CommandHandle.__init__` Was def \_\_init\_\_(self, message_stream: Iterator\[dict\], control: Optional\[\_WSStreamControl\], sandbox: Sandbox, \*, command_id: str = '', stdout_offset: int = 0, stderr_offset: int = 0) -> None; now def \_\_init\_\_(self, message_stream... [pypi.org](https://pypi.org/project/langsmith/0.8.15/) ## 0.8.12 2 breaking changes, first published June 10, 2026. - **Removed** `langsmith.async_client.PLATFORM_HUB` langsmith.async_client.PLATFORM_HUB was removed in langsmith 0.8.12 [pypi.org](https://pypi.org/project/langsmith/0.8.12/) - **Removed** `langsmith.client.PLATFORM_HUB` langsmith.client.PLATFORM_HUB was removed in langsmith 0.8.12 [pypi.org](https://pypi.org/project/langsmith/0.8.12/) ## 0.8.11 1 breaking change, first published June 8, 2026. - **Signature changed** `langsmith.AsyncClient.create_feedback` Was async def create_feedback(self, run_id: Optional\[ls_client.ID_TYPE\], key: str, score: Optional\[float\] = None, value: Union\[float, int, bool, str, dict, None\] = None, comment: Optional\[str\] = None, trace_id: Optional\[ls_client.ID_TYPE\]... [pypi.org](https://pypi.org/project/langsmith/0.8.11/) ## 0.8.10 5 breaking changes, first published June 8, 2026. - **Signature changed** `langsmith.AsyncClient.create_feedback` Was async def create_feedback(self, run_id: Optional\[ls_client.ID_TYPE\], key: str, score: Optional\[float\] = None, value: Union\[float, int, bool, str, dict, None\] = None, comment: Optional\[str\] = None, \*\*kwargs: Any) -> ls_schemas.Feedback... [pypi.org](https://pypi.org/project/langsmith/0.8.10/) - **Signature changed** `langsmith.client.ComparativeExperimentResults.__init__` Was def \_\_init\_\_(self, results: dict, examples: Optional\[dict\[uuid.UUID, schemas.Example\]\] = None); now def \_\_init\_\_(self, results: dict, examples: Optional\[dict\[uuid.UUID, schemas.Example\]\] = None, comparative_experiment... [pypi.org](https://pypi.org/project/langsmith/0.8.10/) - **Signature changed** `langsmith.Client.create_project` Was def create_project(self, project_name: str, \*, description: Optional\[str\] = None, metadata: Optional\[dict\] = None, upsert: bool = False, project_extra: Optional\[dict\] = None, reference_dataset_id: Optional\[ID_TYPE\] = None) ->... [pypi.org](https://pypi.org/project/langsmith/0.8.10/) - **Signature changed** `langsmith.sandbox.SandboxClient.create_sandbox` Was def create_sandbox(self, snapshot_id: Optional\[str\] = None, \*, snapshot_name: Optional\[str\] = None, name: Optional\[str\] = None, timeout: int = 30, wait_for_ready: bool = True, idle_ttl_seconds: Optional\[int\] = None... [pypi.org](https://pypi.org/project/langsmith/0.8.10/) - **Signature changed** `langsmith.sandbox.SandboxClient.sandbox` Was def sandbox(self, snapshot_id: Optional\[str\] = None, \*, snapshot_name: Optional\[str\] = None, name: Optional\[str\] = None, timeout: int = 30, idle_ttl_seconds: Optional\[int\] = None, delete_after_stop_seconds: Optional\[int\] = None, vcpus... [pypi.org](https://pypi.org/project/langsmith/0.8.10/) ## 0.8.9 1 breaking change, first published June 3, 2026. - **Signature changed** `langsmith.sandbox.SandboxClient.create_snapshot_from_dockerfile` Was def create_snapshot_from_dockerfile(self, name: str, dockerfile: Union\[str, os.PathLike\[str\]\], fs_capacity_bytes: int, \*, context: Union\[str, os.PathLike\[str\]\] = '.', build_args: Optional\[Mapping\[str, str\]\] = None, target... [pypi.org](https://pypi.org/project/langsmith/0.8.9/) ## Check your code These are the changes. 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