# description
Canonical machine-readable representation of the Matter design system. Generated at build time from @matter/tokens, @matter/components, and @repo/brand. Agents pin against `version` (mirrors packages/tokens/package.json#version).

# properties.motion_grammar.properties.durations.description
@matter/tokens motion durations are CSS strings ("220ms"); brand-side `duration.*` tokens are numeric millisecond literals. Both ship to consumers, mirroring TokenRow.value.