AI has turned the old rule that planning saves money on its head. When code, tests, and debugging can be generated in minutes, the cost of a mistake drops from days to hours. Developers now favor quick, evaluable prototypes over exhaustive specs, shifting the balance toward review daily process.

Instead of treating plans as contracts, teams treat them as hypotheses. The new workflow starts with a 5‑minute success‑criteria sketch, a 10‑minute build, another 10‑minute review, and a 5‑minute decision to refine, rebuild, or rollback context. This loop turns failure into rapid learning for every iteration in the process.

Not all decisions can be left to trial. Irreversible choices—like external API contracts, shared data schemas, or compliance rules—still demand careful planning. For the rest, the mantra is simple: build fast, evaluate relentlessly, and let the cheap cost of iteration guide the next step for developers everywhere in the industry.