trend-data

name	trend-data
description	Use when implementing trend collection, time-series storage (Timescale or abstraction), charting, CSV export, retention, or per-point sampling configuration. Triggers on: trend, Timescale, telemetry, historian, chart, COV, sample interval, quality.

Trend data

Spec anchors

• bas_build_spec/spec.md — Trends, TrendSample, long-term retention intent.
• bas_build_spec/acceptance_criteria.md — Trends section.

Architecture

• Keep ingestion and query behind a time-series interface so the TSDB can change without rewriting the API surface.
• Samples: timestamp, value, quality/status; configurable interval per point where required.

Related skills

• bacnet-point-modeling — which points are trended from the field.
• alarm-workflows — trend-assisted diagnosis.
• web-app-bas — API + UI wiring.