Actual proposed policy:

Nobody in KDE should know if you use an LLM — not because you're concealing it, but because your usage of it produces output indistinguishable from what you could produce yourself. Contributions with obvious and lazy LLM usage may be ignored or closed.

Generally, don't. What you are willing to write is generally the upper limit of what others are willing to read. LLMs, on the other hand, often produce long, rambling, soulless, corporate-sounding nonsense that nobody wants to read; don't do it. This includes:

Don't use an LLM to "organize your thoughts" and copy-paste the output somewhere. Organize them yourself. Don't use an LLM to generate commit messages and merge request descriptions. Write them yourself. Don't use an LLM to generate a reply to someone's question or comment, then copy-paste that as if it were your response. Understand and reply yourself.

The one acceptable usage is to write text in your native language and then machine-translate it into English, with no stylistic or tonal changes.

But of course reading is for the LLM, it's far better to be outraged about 'hopping on the Pro-AI train'.