staged

A credit ledger that grants GPU-hours, spends them, and expires unused grants. The trap is which grant to spend first. Here is the FIFO-by-expiry design.

The rotting-oranges family of build screens: a state spreads outward one step per tick across a grid, and the spec gains rules each round. The signal is multi-source BFS by layers, not per-cell loops. Here is the design that absorbs each new test case.