# Tasks

- [x] Judge whole-collection membership per checked line.
- [x] Count number-of-items members.
- [x] Serve, check and place creates per line.
- [x] Drop a write from its collection once a read shows its entity absent.
- [x] Add domain and serving tests.
- [x] Document per-line membership.
- [x] Measure the six published environments before and after.
- [x] Run static, formatting, duplication, documentation and test gates.