How do you actually research a stock before buying?

I've been talking with my friend who's investing a lot and he told me whole process he uses to research a stock before buying it. He told me, he's trying to streamline how he does stock research. Reading SEC fillings, checking valuations, comparing financials and he told me it still feels like juggling 10 tabs and 5 different tools. I'm curious how you all do it: \- What's your go-to workflow when researching a company? \- What tools or sites do you rely on (free or paid)? \- What's the most frustrating part of the process? \- Anyone using AI tools for research? Has anything actually been useful or is it all hype? I'm a software engineer and genuinely curious if there's a room for building an AI-powered research tool to streamline this process, or if it's just my friend who finds the current workflow painful.