# Decisions

One entry per decision that changes or refines SPEC.md. Numbered, dated, never deleted: a revised decision gets a new
entry and the old one a strike-through plus a pointer. The spec is updated in the same change.

| # | Date | Decision | Why | Where it lives |
|---|---|---|---|---|
| D-001 | 2026-10-17 | Development-first deployment. During development the server runs locally on the owner's M4 Mac (Docker compose `infra/dev/compose.yaml` or `cargo run`) and debug builds pair against it over the home Wi-Fi. M2c splits into M2c-dev (Mac compose stack, Firebase setup, local backup job; runs now) and M2c-pi (Pi provisioning, cert-sync, router forward 8443, Gitea registry and Gitea Actions, Drive backups; after M8, before M10). The registry is Gitea at `http://gitea.lan` (plain HTTP, home Wi-Fi only); the owner provides an example Gitea Actions workflow later. OQ-1 answered; OQ-3 now blocks only M2c-pi. | Owner wants to develop against a local server and defer the Pi. | SPEC §10 (intro, §10.1, §10.3, §10.7), §11.1, §11.2, §11.3, §12, §14.7; PLAN-M2c-dev, PLAN-M2c-pi |
| D-002 | 2026-10-17 | Backup retention on the Pi: local snapshot files are deleted as soon as their upload to Drive is confirmed (`rclone lsf`), not after 30 days. Drive keeps everything. | Owner's choice; the Pi's disk is small and Drive is the archive. | SPEC §10.9 step 5; PLAN-M2c-pi |
| D-003 | 2026-10-17 | Splitwise CSV format confirmed from two real exports (OQ-2 answered). English variant header `Date,Description,Category,Cost,Currency,Amelie Bennich,Jacob Hagstedt` (group "hemma", account "Hemma"); Swedish variant header `Datum,Beskrivning,Kategori,Kostnad,Valuta,Jacob Hagstedt,Amelie Bennich` (general group, account "Vardag", about 1750 rows). Member columns differ in order, so the importer reads member names from the header. ISO dates, point decimal, double-quoted fields with commas, trailing empty line then `Total balance` / `Totalsumma`. Payment category `Payment` / `Betalning`. All rows SEK. Swedish category names are mapped through a committed table (unknown names to `other`, counted as a warning). The partner's display name is Amelie. The CSV files stay in `export/` (git-ignored), never committed or quoted. | Real exports differ by Splitwise UI language. | SPEC §10.8, §12; PLAN-M9 (mapping notes), PLAN-M11 |