self-writing code
nounUK /ˌself ˈraɪtɪŋ kəʊd/
US /ˌself ˈraɪtɪŋ koʊd/
Code that can write or change itself.
The game uses self-writing code to make new levels on its own.
OTHER MEANINGS
2. Software that creates new computer programs without a person typing them.
Their self-writing code built a small app in seconds.
3. A program that rewrites parts of itself while it runs.
The virus used self-writing code to hide from scanners.
4. A tool that turns plain instructions into working code automatically.
With self-writing code, she described the website and it appeared.