In the loṭ (Imperative Mood) āṭ is the augment of the affixes the first person and the termination is as if it had an indicatory p,
This is clear. Thus in the Parasmaipada, we have आनि, आव, आम । Thus करवाणि, करवाव, करवाम; करवै, करवावहै, करवामहै ।,
आड् उत्तमस्य पिच् च
Adhyāya 3 · Pāda 4 · Rule 92