I Tried to Write a Program That Could Still Run Unmodified in 2056

Modern software can become surprisingly difficult to run after only a few years. Dependencies disappear, package managers change, APIs get deprecated, runtimes stop supporting old versions, and sometimes the build instructions become archaeology before the actual code does. So I tried the opposite approach: write a small useful program in 2026 while treating 2056 as a real deployment target. The result turned out to be less about choosing the perfect language and more about removing assumptions that normally feel completely harmless.
