Deterministic combinatorial solvers in stdlib — balance work across workers/backends (assignment, LPT), pack items under a capacity (bin-packing, FFD), and order plan steps under dependencies into a sequence + parallel waves (DAG topological scheduling, cycle-detecting). 0 cloud tokens, repeatable. Use to spread cluster work, pack tasks under a budget/capacity, or order a plan's steps — instead of asking an LLM to figure out the assignment/order.