Predictive windshear is, as the word implies, a prediction of windshear ahead. You will avoid it, if possible. If not, as below.
Reactive windshear is a detection of an actual windshear condition. You will call out "WINDSHEAR TOGA", advance thrust levers to TOGA and follow SRS orders, preferably wings level, without changing configuration until out of the WS. With AP ON, you can keep it on, but keep in mind it will disconnect if you reach angle of attack protection and alpha floor activates. You may need full aft sidestick.
Then, if height was near zero and you finally manage to start climbing, the call out is "pheeew"