For a solo developer, the "bridge" between software and business is often an internal struggle between your identity as a builder and your necessity as a founder. Most solo projects die because the developer spends six months building a cathedral of code for a congregation that doesn't exist. Business intelligence, in this context, is the discipline to realize that your code is a liability—a cost in time and maintenance—until it solves a problem someone actually cares about. If you are prioritizing a "clean" architecture over a landing page that validates demand, you aren't building a business; you’re indulging in a high-effort hobby.
To keep your project from becoming another "ghost" repository, you have to stop thinking about features and start thinking about distribution. A mediocre product with a great distribution strategy will survive, while a technically superior product with no way to reach users will die every time. This requires the "intellectual honesty" to admit when a feature is just a technical curiosity. If you can’t find ten strangers who want to use your solution in its ugliest, most basic form, then no amount of refactoring or "scaling for the future" will save it. You have to be willing to kill your favorite technical puzzles if they don't serve the bottom line.
Ultimately, the bridge is built by treating your time as a finite capital investment. Every hour spent on a feature is an hour not spent on marketing, customer discovery, or sales. Business experience teaches you that a "good idea" is only as good as its market fit. If you lack the business intelligence to look at your own work through the cold lens of a user’s "Return on Effort," you will likely burn out before you ever launch. Don't let your project die because you were too busy being a CTO to notice that your company didn't have a CEO.