It changes how confident today's suggestion is, and it never sets the weight; your logged performance always does that.
Here is the whole rule in one line. Your logged performance drives the weight. Wearables move confidence. A symptom you log can ease a session. Your cycle phase gives context. Nothing on that list except your own logged sets goes anywhere near the barbell.
A recovery reading is a measurement of one night, not a verdict on a person — and a wrong verdict is not harmless. Being told your sleep was poor can make the session worse even when the sleep was fine. So Rhythm uses those signals to say how sure it is, and leaves the number on the bar to the thing it can actually see: what you lifted last time.
Every read in the app opens. Tap the day's suggestion and you get the reasons behind it in plain words. Tap the confidence line and you get what fed it. Tap the “adjusted today” pill on an exercise and you get what changed and why. There is no number in Rhythm you cannot open.
When the data is thin, Rhythm says so rather than filling the gap. A low reading is not a diagnosis, and nothing the app tells you about your recovery is medical advice. And when it suggests an easier day, it names something you can still do — the door stays open.