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There are characters you cannot see

This story is from 2026-09-27. It is preserved in the archive; the latest stories are on the live feed.

Some Unicode characters render as nothing. No glyph, no space, nothing on your screen. A model reads them as text. That is the whole problem in one sentence. If an LLM reads what users write, every user is talking to your AI. Some will try to give it orders. The plain ones write "ignore previous in…

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  1. 2026-09-27 22:00 · DEV Community — AI
    There are characters you cannot see

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