A GTM engineering method for builders: settle the ICP, the evidence, the unit economics and the playbook gates before you build, with a fictional worked example.
A method for GTM agencies and GTM engineering firms: one brain per client, linked project folders, reusable skills, clean handover, and a bounded pilot first.
Why your ICP, lists and decisions drift across CRM, enrichment, outreach and AI chats, why AI agent memory is not a GTM record, and what a durable one needs.