I'm exploring a learning system that addresses the dual challenge many of us face: remembering both technical concepts AND the business domain knowledge needed to apply them effectively. After years of coding in different industries, I've noticed that understanding the domain (finance, healthcare, e-commerce, etc.) is often as challenging as mastering the technical stack, yet most learning tools focus solely on the technical side. Some questions I'm curious about:

How do you currently capture and retain domain-specific knowledge alongside technical concepts? What's your biggest challenge when onboarding to a new codebase with an unfamiliar business domain? Have you tried using flash cards or spaced repetition for either technical or domain knowledge? What worked or didn't? Would you find value in a tool that could help teams build shared mental models of both their tech stack and business domain? How do you currently transfer domain knowledge between team members?

I'm in early validation stages and would appreciate your insights before building anything. If there's enough interest, I'll share what I learn from this thread.