derive-metric
Installation
SKILL.md
Resolve a metric gap without saving definitions
Use the shared contract and filters/units. Follow this order; stop at the first sufficient option.
For a business-derived measure, confirm case/event entity, outcome definition/provenance, units, time basis and aggregation. Are amounts incremental transactions or cumulative snapshots? Never assume sum, latest or maximum: nonmonotonic snapshots require authoritative ordering and refund/correction semantics. Missing definitions mean inconclusive; ask before computing. Do not infer formula grammar from an example name or business description.