A developer's shift from solo coding to managing multiple teams, and why project charters matter

The author, a backend developer of fifteen years, recounts building a full project-management platform alone in three months at low cost. They explain that the skills that made them effective as a solo coder did not translate to managing people, where agreement and communication are the real bottlenecks. The author argues that scaling to several teams at once is a different challenge, where failures occur in the gaps between people rather than in the code. They propose treating a project charter as a human interface definition, mapping its sections to familiar developer concepts such as purpose, acceptance criteria, scope, and ownership.