I was not losing product docs. I was losing the current decision.

I kept blaming my notes.

A PRD would start in one place. The user flow would move to a whiteboard. Screen decisions ended up in a design file. Test criteria were buried in an AI chat. Nothing was exactly missing, but by implementation I could no longer answer a simple question: which decision is current?

That was the real reason I started building ProductChaengi.

The problem was the handoff

Most tools help create one more artifact. That part has become much easier with Codex, Claude, and ChatGPT. What did not get easier was carrying a reviewed decision into the next stage.