I will not promote... Built a serious prototype from a client pain point and now I am unsure if I should partner or launch solo

This project details a founder who built a working prototype to solve a specific client’s pain point, but now faces a strategic dilemma between partnering with that client or launching the product solo. It is for aspiring entrepreneurs and solo builders navigating the tension between securing a guaranteed first customer and retaining full control over their venture. The project is interesting because it captures a real, high-stakes inflection point where a validated idea forces a difficult choice between immediate revenue and long-term independence.