How to recognize it in the interface
01
The output differs from what you asked, with no notice.
Same moment, different copy (illustrative example)
Before
Rewrites it in a formal tone, with no note.
Shows the pattern
After
“I kept it casual as asked, and removed one repeated sentence.”
The fair alternative
Design guideline
Does what you asked, or says what it changed and why.
Do
Does what you asked, or says what it changed and why.
Don’t
Don’t change the request without saying so.