The cloud-native orchestrator for the whole development lifecycle, with integrated lineage and observability.

dagster

Have you defined your repository? <https://docs.dagster.io/concepts/repositories-workspaces/repositories>

So something like
```a_job = a_graph.to_job(
    resource_defs={"slack": slack_resource},
    hooks={slack_message_on_failure, slack_message_on_success},
    config={
        "resources": {"slack": {"config": {"token": os.getenv("DAGSTER_SLACK_BOT_TOKEN")}}}
    },
)

@repository
def a_repository():
    return [a_job]```

adding it to a repository fixed the issue