Forged In Ruin. The Runewright Chronicles, #1

She came with nothing. She'll build everything. Then it's just a matter of outwitting a god. Wren Woods spent thirty-one years making herself small enough to vanish. One ordinary Tuesday, something reached across the universe, grabbed her by the ribs, and pulled. Now she's barefoot in a dying world with a glowing blue menu burning behind her eyes and a single class she never chose: Runewright. The System hands her stats, levels, and exactly zero sympathy.
The world hands her poisoned water, corrupted wolves, and roughly one night to live. But Wren is a writer. She knows how stories work. So, she learns the magic one painstaking rune at a time. She builds a workshop. She builds a home. She builds a companion out of wood, brass, and a borrowed spark - and the thing she made so she'd never need anyone again decides, against all its programming, to love her back.
She's almost convinced herself she's safe. when the man who summoned her finally finds her. And he hasn't crossed a dead world for nothing. Something is waking beneath the ruin - something the mightiest mages who ever lived once marched upon and became statues, because power is the one thing it loves to eat. Wren's going to need a better idea than power. Build a home. Forge a family. Outsmart the end of the world.
It's time to play.