How do you know when an MVP is actually ready to put in front of users?

When building a side project solo, there's always that tension between shipping early and wanting the core flow to feel refined.

Every time I tell myself "just one more edge case to fix before anyone tests it," I realize I might just be stalling real feedback.

For solo makers: what is your personal rule of thumb for deciding a build is functional enough to share publicly versus needing more polish behind closed doors?