Y0 Reasoning

Y0 Reasoning is what the runtime reaches for when the answer is not a sentence but a chain: a migration plan with ordered dependencies, a pricing decision with second-order effects, a contract clause whose meaning turns on three other clauses. Where Y0 Text optimizes for the first plausible answer, Y0 Reasoning budgets deliberate computation — it decomposes the problem, explores alternatives, checks its own intermediate conclusions, and only then commits. The defining property is that the work is shown. Every reasoning run emits its full deliberation into the trace: the assumptions it made, the branches it discarded and why, the step where it consulted the context graph to verify a number rather than recall it. That trace is not marketing; it is the debugging surface, and it is why teams put Y0 Reasoning in approval-gated workflows where a wrong answer is expensive. Latency is honest too — seconds, not milliseconds, with a max_steps ceiling that is enforced rather than advisory, so a runaway deliberation halts instead of billing you. Y0 Reasoning is generally available and is the planning engine behind execution graphs and the agents family.