- com.tomplanche.atkuzu.preferences record A single, mutable per-account record of the player's board display preferences, edited in place like a profile.
- com.tomplanche.atkuzu.result record not from the namespace authority An immutable record of one completed atkuzu (Binairo/Takuzu) daily puzzle, written to the player's own PDS. Write-once: no field may change after creation. The record key is `<puzzleNumber>-<size>` (e.g. `412-8`), so each size can be recorded at most once per puzzle day per account and re-solving cannot overwrite or spam.
- com.tomplanche.atkuzu.stats record not from the namespace authority A single, mutable per-account streak/stats record, edited in place like a profile. It also doubles as atkuzu's declaration / signaling record: its presence signals that an account plays atkuzu, and its deletion signals opt-out. Created on first play, even before any stats accrue.