The idea that every shared design decision lives in exactly one authoritative place, so everyone pulls from the same source instead of keeping their own slightly different copies. When that one source changes, everything downstream updates.
Synonyms
- SSOT
Related terms
In plain words
- one official place everything else copies from
- no scattered duplicates, just one master source
Usage example
Because the color palette was a single source of truth, one edit fixed the brand color across web and mobile.
Don't confuse with…
- design tokensSingle source of truth is the principle; design tokens are one mechanism that puts specific values in that single place.
Categories
- Design systems