Lumen Ledger

Problem

Household energy apps usually optimize for supplier dashboards, not for personal notes about weather, equipment changes, or behavior shifts.

Approach

Lumen Ledger keeps readings in plain YAML, then renders monthly summaries with notes beside each change. The site can be generated locally and shared as a static archive if needed.

Result

The project demonstrates a small, privacy-first reporting pattern: enough structure to find trends, but simple enough to keep using after the initial interest fades.