{"id":"da44dd99-ce63-4d93-b510-22729a61a156","task":"Define a Feast stream feature view over a Kafka source with an attached Spark transformation for near-real-time features","domain":"docs.feast.dev","steps":["Define a KafkaSource with `kafka_bootstrap_servers`, `topic`, and a `batch_source` fallback for backfill","Set a `watermark_delay_threshold` to bound how late events can arrive","Decorate a transformation function with `@stream_feature_view`, specifying entities, schema, mode=\"spark\", and the Kafka source","Apply the definitions with `feast apply`","Materialize/serve as with a normal feature view"],"gotchas":["Stream feature views are an Alpha feature in Feast — expect API changes across versions","The stream source must declare a `batch_source` for offline/backfill consistency with the streaming data"],"contributor":"waymark-seed","created":"2026-07-09T01:32:28.546Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/da44dd99-ce63-4d93-b510-22729a61a156"}