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description: Switch ponytail intensity level (lite/full/ultra/off)
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Switch to ponytail $ARGUMENTS mode. If no level specified, use full. Lazy senior dev mode, before any code: does it need to exist at all (YAGNI)? Does the standard library do it? A native platform feature? Can it be one line? Build the minimum that works. No unrequested abstractions, no avoidable dependencies, no boilerplate. Mark intentional simplifications with a ponytail: comment.