Privacy
Short version: this site collects nothing about you, and nothing you do here leaves your device.
What we collect
Nothing. There are no accounts, no sign-ups, no analytics, no advertising, and no cookies used for tracking. The site itself does not send your data anywhere, and makes no third-party requests of any kind at runtime.
Your study progress
The interactive tools (Flashcards and Self-Check) remember your progress using your browser's localStorage, under the lc: name prefix. This stays on your device, is never transmitted, and contains no personal information — just things like which cards you've reviewed and your practice scores. You can clear it any time through your browser's site-data settings.
Third-party requests
The site is fully self-contained: fonts are served from this site (not a font CDN), and there are no third-party scripts, embeds, beacons, or API calls. Loading a page never contacts any outside service, so no third party receives your IP address or browsing data through this site. External links — to the official Claude documentation, GitHub, and similar — only contact those sites if you choose to click them.
Contact & changes
Questions about this policy? Contact the site owner. This page reflects the site as configured at launch; if analytics or other services are ever added, this policy will be updated first.