The fullscreen suggestion is now a real dialog; force it with CLAUDE_CODE_FORCE_FULLSCREEN_UPSELL.
What's wrong with this entry?
The prompt suggesting fullscreen mode is rendered as a first-class dialog rather than an ad hoc surface. Dismissing it records the dismissal, and if you typed something first it queues a 12-second feedback notification. Eligibility is a long list of negative checks plus a cap on how many times you have already seen it; setting CLAUDE_CODE_FORCE_FULLSCREEN_UPSELL shows it regardless.
fullscreen-upsell-done
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
Related
Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.
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v2.1.236
Fullscreen trial environment variable, and the upsell prompt now stops after three showings
Both mention force fullscreen upsell