At some point every "let me just paste my code into the AI" session hits a wall. You want the model to reason about the whole project — not one file — so you start copy-pasting directories. Three things go wrong, usually in this order:

You paste a file with a live API key in it.

You exceed the context window and get a truncation (or a silently partial answer).

The model loses the plot because it can't see how the pieces fit.

Here's a workflow that handles all three, whether you build the tooling yourself or use an off-the-shelf one.