When thinking is set (e.g. thinking=low), the model produces internal
thinking blocks. The reasoning auto-default (based on model capability)
was formatting these blocks as "Reasoning:" text and delivering them to
WhatsApp/Telegram, leaking internal content to users.
Skip auto-enabling reasoning when thinkLevel is already set — the two
features serve the same purpose and enabling both causes the model's
internal thinking to be exposed as visible chat messages.
Users who explicitly set /reasoning on still get reasoning output.
Closes#24290
Co-authored-by: Cursor <cursoragent@cursor.com>
42795b87a3