# DDFU™
>
> DDFU™ (Develop & Design for Use™) is an IT services and cloud solutions provider, Dell Technologies Solution Provider, and Microsoft cloud & AI partner. Public marketing site in English and Czech.

Start here for a **compact** machine-readable index. For the full curated link map (services, both languages), read **[llms-full.txt](https://ddfu.org/llms-full.txt)**.

- [Home (EN)](https://ddfu.org/): marketing homepage
- [Home (CS)](https://ddfu.org/cs): Czech homepage
- [Contact (EN)](https://ddfu.org/contact): sales and inquiries
- [Contact (CS)](https://ddfu.org/cs/contact): kontakt a poptávky
- [Sent status (EN)](https://ddfu.org/sent-status): message / delivery status
- [Sent status (CS)](https://ddfu.org/cs/sent-status): stav zprávy / doručení
- [Sitemap](https://ddfu.org/sitemap.xml): all built URLs for crawlers

## Optional
- [llms-full.txt](https://ddfu.org/llms-full.txt): expanded llms.txt content (same spec, more links)
- [security.txt (canonical)](https://ddfu.org/.well-known/security.txt): RFC 9116 — also at [https://ddfu.org/security.txt](https://ddfu.org/security.txt)
- [AI plugin manifest](https://ddfu.org/.well-known/ai-plugin.json): legacy ChatGPT plugin-style discovery (no live plugin API)