A popular request in the community is the ability to "adopt" Jas, especially after marrying her godfather, Shane. While there isn't a single "one-click" mod for this, players often use a combination of:

For many players, the goal isn't marriage but rather a deeper connection to the character. is a highly-rated mod on Nexus Mods that focuses on: stardew valley jas marriage mod best

Adds significant dialogue and heart events for both Marnie and Jas. A popular request in the community is the

stardew valley jas marriage mod best