C'est dans mes cordes

Literally: It is in my strings

Example: “Réparer une fuite d'eau ? Pas de souci, c'est dans mes cordes.” — Fix a water leak? No problem, that's right up my alley.

English equivalent: Right up one's alley

Origin: Musical, and once literal. The Académie française's 1832 dictionary records corde as meaning a note or a pitch, by way of the vocal cords, and Littré cites a singer's voice being fine dans les cordes élevées (in the high notes). A piece of music therefore lay within a performer's cordes if their range and technique could actually carry it — a plain statement about what a voice could do. From there it spread to every other domain, so that any task is dans vos cordes if you have what it takes to see it through.