# Changelog

## v0.1.0

Initial release.

- `%AshWeight{mg: integer}` struct.
- `Ash.Type` behaviour: storage as integer milligrams.
- Constructors: `new/2`, `from_mg/1`, `from_g/1`, `from_kg/1`. Accept
  integer, float, `Decimal`, or numeric string. `Decimal`-based arithmetic
  prevents float drift.
- Conversions: `to_mg/1` (integer), `to_g/1` and `to_kg/1` (Decimal).
- Arithmetic: `add/2`, `subtract/2`, `multiply/2`.
- Comparison: `compare/2`, `equal?/2`.
- Input casting: `%AshWeight{}`, integer, `{value, unit}` tuple, atom- or
  string-keyed map, `nil`.
- Constraints: `:min`, `:max` (in mg).
- `String.Chars` formats `"250 mg"`, `"1.5 g"`, `"2.25 kg"` by picking the
  largest unit that yields `|value| >= 1`.