The Dagster 1.9 release, named Spooky, is a significant update that introduces declarative automation, which marks the system as stable and extends it to asset checks. This feature allows users to automatically materialize assets when specific criteria are met, such as waiting for new upstream data. The release also introduces integrations with business intelligence (BI) tools like Tableau, Power BI, Looker, and Sigma, enabling users to orchestrate updates to these assets and simplify data refreshes. Additionally, a toolkit called Airlift is introduced to accelerate migration from Airflow to Dagster, facilitating a three-step process of peer observation, model lineage tracking, and API invocation. The release includes changes to the UI information architecture to make important entities easier to find, such as moving backfills to the runs page and introducing new pages for jobs and automations. Other notable features include asset kinds with labels that show up on asset nodes in the UI and a more general compute_kind attribute. The community is thanked for their efforts in making this release possible, and users are encouraged to provide feedback and participate in future releases.