Use when designing or implementing data ingestion, CSV imports, time-series storage, Python services that sit alongside Next.js, simulation pipelines, or external-API integration with submit/poll/fetch shapes. Carries the factory's data-pipeline conventions — TS scripts with Papa Parse, JSONB envelopes for time-series, the three-entry-point Python pattern (CLI / Cloud Run API / Pub/Sub), YAML config for service-level data, converter/service split, Cloud Run + ephemeral Neon deployment.
