Cookie Notice

This notice describes the cookies and similar technologies AltHarbor actually uses, what each one does, how long it lasts, and the choices available to you. AltHarbor does not use advertising cookies, cross-site tracking pixels, or social-media trackers.

This inventory is maintained against the production configuration. If a technology is added or its purpose changes, this notice is updated before the change takes effect, with a new version and effective date.

These are required for the site to function and operate without a consent prompt. Blocking them in your browser may prevent access.

• Site access cookie (`altharbor_site_access`) — set only when authorized research access is granted (for example, an automation or invitation path that proves the gate secret). A walkthrough request does not set this cookie. It stores a signed access token, not your identity. Duration: 30 days. Provider: AltHarbor (first party).
• Walkthrough confirmation flash (`altharbor_gate_email`) — set briefly after you submit a walkthrough request so the thank-you screen can show the address you entered without putting it in the URL. Duration: about one hour. Provider: AltHarbor (first party).
• Authentication and session storage — if you create an account or sign in, Supabase authentication cookies keep you signed in and protect your session. Duration: for the session and refresh window. Provider: Supabase (authentication infrastructure).

• Theme cookie (`altharbor-theme`) — remembers your light/dark theme choice so pages render in your preferred appearance without a flash. Duration: 1 year. Provider: AltHarbor (first party). Deleting it simply resets the theme to the default.

• Vercel Analytics and Speed Insights — page-view and performance measurement, loaded only in production. These tools are configured without third-party advertising cookies. They process technical information such as page paths, referrers, device class, and timing.
• Sentry error monitoring — captures diagnostic information when something breaks (error message, affected page, browser and device context). AltHarbor configures Sentry with default personal-information collection disabled and session replay off, and scrubs events before they are stored. Diagnostic data can still include technical context about your request.

AltHarbor does not describe this data as anonymous; it is technical and pseudonymous diagnostic data handled under the Privacy Policy.

• You can block or delete cookies in your browser settings. Blocking the site-access or authentication cookies will prevent authorized research access or sign-in from persisting. Blocking the walkthrough confirmation flash cookie only affects the thank-you confirmation display.
• The theme cookie is optional; deleting it has no effect beyond resetting your theme.
• AltHarbor does not currently load advertising or cross-context tracking technologies, so there is no advertising opt-out to configure. If that ever changes, this notice and the available controls will change first.

Material changes to this notice are published with a new version and effective date, and prior versions remain available from this page. Questions: privacy@altharbor.io.