The heart is the signature. Every BBS artifact ends with a jadeite heart linking home — that's the whole rule.
The marks
horizontal · theme-tinted
stacked
mark
heart · favicon scale
Monochrome · for print and single-color contexts
light bg · ink fill
dark bg · white fill
Heart hierarchy · use in order
01 · default
Solid jadeite
Every BBS artifact. Hero moments, inline text, footers — the signature that says Stephen made it. Always wrapped in <a href="https://builtbystephen.me">.
02 · fallback only
♡
Mono heart
Print, single-color contexts — only if jadeite unavailable.