The scheme script always generated with material-color-utilities' 2025 spec.
An application whose palette was generated with M3's original 2021 colour
(ReStride) could not reproduce it. The script now takes `spec` ('2025' by
default, or '2021') and refuses anything else, and the command takes
`--spec`, validated before Node runs.
Colour profiles may set their own `spec`, `success`, `warning` and `info`;
without them the command's options apply. The stylesheet header writes out
every option that differs from its default, so the recorded command
regenerates the file, and a profile whose spec differs from the header's
names it. Default output is byte-for-byte unchanged.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RHoXZSHc8gGpZjFmA5fPc2
