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Privacy & data

This page explains what happens to the text you type into the lesson planner, where it goes, and how long it stays. The planner is a single-developer tool; the policy is short on purpose.

What happens to the text I type?

When you click Generate, the planner sends the level, topic, starter, and any optional note you wrote to the language model you've chosen in the Engine settings. The model writes the lesson plan and streams it back to your browser.

The currently-configured providers are:

xAI Grok — also generates illustrations
Anthropic Claude
OpenAI
Google Gemini — also generates illustrations
Mistral

Each provider has its own privacy policy. The planner does not add a layer on top: your prompt goes directly to whichever model you picked.

Don't include student names, ID numbers, or other personal details in the topic, starter, or note fields. The text is sent to a third-party language model and will be processed there. If you need a lesson tailored to a specific class, describe the class, not the students.

How long are plans stored?

Generated plans are stored on the server as files keyed by a random ID. The server keeps the most recent 500 plans in active storage. Past that, plans move to a cold tier (still readable via the /view URL) and are eventually purged after about 90 days. There are no scheduled backups.

If you want a permanent copy, download the PDF or DOCX, or click the print button — those are yours to keep.

How do I find a plan I made before?

The address bar shows a link the moment your plan finishes generating — bookmark it. The planner also remembers your most recent plan in your browser's local storage, so on the same browser you'll see a "Continue your last lesson plan?" banner when you come back.

If you lose the link and switch browsers, there's no way for the planner to find your plan again — it has no email or account on file unless you specifically chose to add one.

Editing a plan and sharing

Each plan has two URLs: the one in your address bar (which lets you edit) and a read-only version (the same URL with the ?t=… token removed). When you share a plan with a colleague, you can share either: the read-only link is safer because it can't be silently edited.

Cookies and tracking

The planner sets no cookies. There are no third-party trackers, no analytics beacons, and no advertising integrations. The only browser-side storage is your local plan history, which lives in your browser only.

Contact

Questions, deletion requests, or anything else: luke@lukesteuber.com. If you want a specific plan deleted before the 100-newest rotation reaches it, send the URL.

Last updated 2026-05-05.