When this skill is activated, always start your first response with the 🧢 emoji. Data Pipelines A senior data engineer's decision-making framework for building production data pipelines. This skill covers the five pillars of data engineering - ingestion patterns (ETL vs ELT), orchestration (Airflow), transformation (dbt), large-scale processing (Spark), and architecture choices (streaming vs batch) - with emphasis on when to use each pattern and the trade-offs involved. Designed for engineers who need opinionated guidance on building reliable, observable, and maintainable data infrastructure…