Open Source Software Licenses
Open Source License Attribution — Last updated: July 16, 2026
For the open source software and web fonts that this Site (https://siiiiiixth.com, operated by KK siiiiiixth / 株式会社siiiiiixth) delivers to visitors' browsers, the copyright notices are listed below in accordance with each license. Libraries used only on the server, and tools used only at build/test time, are not delivered to visitors and are therefore omitted. For the full license text, please refer to each linked source.
Client-Delivered Libraries
Libraries delivered to and executed in the visitor's browser.
| Library | License | Copyright |
|---|---|---|
| Next.js | MIT | © Vercel, Inc. |
| React / React DOM | MIT | © Meta Platforms, Inc. and affiliates |
| Tailwind CSS | MIT | © Tailwind Labs, Inc. |
| sonner | MIT | © Emil Kowalski |
| clsx | MIT | © Luke Edwards |
| tailwind-merge | MIT | © Dany Castillo |
Web Fonts
Web fonts delivered by this Site. System fonts (SF Pro / Hiragino Sans, etc. provided by Apple) are not delivered by this Site and are therefore not listed.
| Library | License | Copyright |
|---|---|---|
| Geist / Geist Mono | SIL Open Font License 1.1 | © Vercel, Inc. — Designed by Vercel with Basement Studio |
License Texts
In addition to the copyright notices listed on this page, the full license texts can be viewed at the URLs below: