le habrás dicho

you must have told him or her

→ le
phrase Rare #54,058
you must have told him or her Often uses the future perfect to express a guess about something that happened in the past. “Le” refers to the person told; their gender depends on context.
SP: Le habrás dicho la verdad.
EN: You must have told him or her the truth.

¿No le habrás dicho nada más?

You haven't told him/her anything else, have you?

— Perros de Reserva (1992)

Le habrás dicho algo que le ha molestado.

You must have said something that upset him.

— 8½ (1963)

No le habrás dicho tu nombre, ¿verdad?

You didn't tell him your name, did you?

— Perros de Reserva (1992)

Quién sabe qué le habrás dicho a la oscuridad.

Who knows what you might have said to the darkness.