Package-level declarations

Thin KMP logging facade over Napier so call sites never import Napier directly (swap the backend in one place). Napier's antilog is installed per-platform at app startup by each entrypoint.

Crash / non-fatal reporting behind an interface, so callers depend on the capability — not on Firebase Crashlytics or Sentry directly. Swapping in a real backend is a one-line DI change with no call-site edits.

Injectable dispatchers so ViewModels/repositories are testable (swap for a test dispatcher).

Pure ELO ladder math — the rating step and expected-score curve any ranked/competitive feature wants. No clock, no I/O, no domain types: a rating is an Int, a bout is 1-v-opponent, and step returns the new rating. Deterministic and testable.

Pure-Kotlin SHA-1 / SHA-256 (no java.*, wasmJs-safe). Content-fingerprint / cache-key hashing — not a security primitive: no HMAC, no constant-time comparison, no salting.

Dependency-free default CrashReporter that routes everything through AppLog (Napier). Gives the same call sites and breadcrumb discipline as a real backend, minus the upload. Honors the setEnabled kill switch (starts enabled); when disabled, reporting calls drop silently.

Immutable, counter-based seeded PRNG (SplitMix64).

Platform-agnostic text holder so ViewModel state/effects never carry raw, pre-resolved strings — the UI edge resolves a UiText to an actual String (via stringResource / moko-resources for Res, or directly for Dynamic). Domain/data layers stay locale-free.

Best-effort resolution with no resource table: Dynamic → its value, Res → its key, Empty → "".

EaseInQuart — sharp initial acceleration.

EaseOutBack — slight overshoot settle. s=1.70158 (same constant both origin apps used).

EaseOutCubic — smooth deceleration.

Decimal formatting without String.format. Rounds half-up to places digits.

Whole-number thousands-comma grouping, no String.format (e.g. 12345.6 -> "12,345").

12-hour time with AM/PM, e.g. (13, 5) -> "1:05 PM".

24-hour time, e.g. (9, 5) -> "09:05".

Linear interpolation, t clamped to 0, 1.

Renders minor currency units (e.g. paise, cents) to a "<major>.<minor>" decimal string with fractionDigits digits — the single canonical minorUnits->decimal formatter for :common and its consumers.

Two-digit zero-padded string for an Int (e.g. 5 -> "05").

Friendly date, e.g. "Jun 19, 2026".