Hello! Here's a summary of the Connector Builder and CDK features released over the last week (06/19 - 06/25): Connector builder: - [Support single-use OAuth refresh tokens](https://docs.airbyte.com/connector-development/connector-builder-ui/authentication#update-refresh-token-from-authentication-response) - UI suggests cursor field and date formats by inspecting test data - Bug: OAuth: refresh request body is passed by url encoded parameters instead of json body - Bug: Partitioned streams now track state on a per-stream basis, fixing a bug that could cause incremental sync state to be incorrect when using partition routers Python CDK: - Substreams: Better handling of 403 errors when reading records from parent streams Be sure to upgrade to the latest version to benefit from these improvements! - [Airbyte platform: v0.50.5](https://github.com/airbytehq/airbyte-platform/releases/tag/v0.50.5) - [CDK: 0.43.1](https://github.com/airbytehq/airbyte/blob/master/airbyte-cdk/python/CHANGELOG.md)