product-looplisted

# Product Loop One product decision cycle in four phases: **Discover** what deserves building, **Specify** what must be true, **Launch** to a bounded audience, then **Learn** whether the bet paid. Enter at the phase the evidence supports and stop at the next decision, rather than running all four by default. ## Phase Selection | Situation | Phase | | ------------------------------------------------------------- | -------- | | The problem, demand, or wedge is still unproven | Discover | | Discovery is validated and behavior must be pinned down | Specify | | The change is built and needs a staged audience | Launch | | The experiment, launch, or sales attempt has produced results | Learn | Entering the wrong phase is the common failure: writing requirements for an unvalidated problem, or claiming lessons from a launch that never shipped. Name the phase and its evidence before starting. ## Ground Rules These apply to every phase. - Separate observations, supplied evidence, inferences, and assumptions. Never convert enthusiasm into proof. - Treat market size, demand, willingness to pay, and competitor claims as current facts that require primary evidence. - Do not invent quotes, logos, metrics, demand, research, legal requirements, availability, or support capacity. - Do not contact customers, create accounts, mutate a CRM or analytics, publish pages, buy ads, or spend money witho