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Correct answer: C. The monthly Tab allowance has run out, and suggestions pause until the next billing cycle.
Explanation
The principle — Tab is metered on the free tier. Once the month's allowance is consumed, suggestions simply stop until the cycle rolls over, and the editor raises no error, which is precisely why the silence gets mistaken for a fault.
Why the key is correct — Free Hobby accounts have a monthly Tab allowance, and suggestions pause once it is used up, resuming with the next billing cycle. That matches a mid-month stop with everything else still working.
Why the others are wrong — A settings reset fixes nothing, because no setting changed. An expired session would disable chat and agents too and would ask for a sign-in. An outage would disturb more than completions.
Remember this — Quiet Tab plus a healthy editor mid-month points at the allowance rather than a bug.
Sources — Cursor's Tab troubleshooting help page.
Sources
“Free (Hobby) users have a monthly Tab allowance. Once it's used up, suggestions pause until the next billing cycle.”
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