Fire - Day-by-day FIRE simulator for coast and retire planning

Show HN: How long do I need to work at my salary before I can coast, or retire?

Fire is a day-by-day financial simulator that answers: how long must you work at a high salary before you can coast, retire, or retire without shrinking your nest egg? It simulates your money daily to age 112 in today's dollars, factoring in taxes, expenses, and investments. Using a bisection solver, it finds the shortest work stretch for three goals: retire to $0, coast until 60, or keep your portfolio flat from 100. Built with Claude, it includes what-if tables, city moves, and grid sweeps. Run it with uv and plain Python plans.