Context Windows: Why AI Forgets Your Dietary Needs Mid-Conversation

Think of an AI's context window like a kitchen counter with limited space. You place your ingredients and instructions on it, the AI works with what's there, and then you clear the counter for the next meal. If your counter is small and you pile too many things on it, some items fall off the edge and get forgotten.

A context window is basically the amount of information an AI can hold in its active memory while working on one task. Some AI tools have bigger counters than others. When you're asking an AI to build a week-long meal plan while remembering that you're gluten-free, vegan, and allergic to tree nuts, you're piling a lot on that counter.

Here's what happens: You start by saying "I'm gluten-free, vegan, and allergic to tree nuts. Can you build me a week of breakfasts?" The AI nods and remembers. It suggests three great days of meals. But by day five, if the conversation has gotten long with lots of back-and-forth, the AI might suggest something with cashews—forgetting the nut allergy. Not because it's stupid, but because that detail got pushed off the edge of its working counter.

This is frustrating, but it's not a flaw in you using it—it's just how these tools work right now. The good news? You can work around it. Just like you'd reorganize your kitchen counter to keep the most important items visible, you can keep your dietary needs front-and-center in your conversation.

Different AI tools have different counter sizes. Claude tends to have a bigger one than ChatGPT (meaning it can handle longer conversations), and Google Gemini is somewhere in between. You can always check your tool's documentation to see how long it can remember.

Try this: Next time you're building a meal plan, start your conversation with a clear summary: "Here are my constraints: gluten-free, vegan, $50 weekly budget. Remember these throughout our conversation." If the AI suggests something that breaks one of your rules mid-conversation, simply say "Remember, I'm [constraint]—can you revise that?" and it'll usually catch itself.