https://tetherup.app/blog Occasional writing about relationships, the quiet ways we lose track of people, and what we are building. en-us https://tetherup.app/blog/contact-information-should-belong-to-the-person https://tetherup.app/blog/contact-information-should-belong-to-the-person Every address book ever built assumes your number is a thing other people own copies of. That assumption is the bug. Wed, 19 Aug 2026 00:00:00 GMT https://tetherup.app/blog/permission-system-for-phone-numbers https://tetherup.app/blog/permission-system-for-phone-numbers Circles, the floor everyone gets, and why revocation has to actually revoke — three decisions that turned out to be load-bearing. Wed, 12 Aug 2026 00:00:00 GMT https://tetherup.app/blog/why-your-address-book-goes-wrong https://tetherup.app/blog/why-your-address-book-goes-wrong A copy starts decaying the moment you make it. That is not a discipline problem — it is a design problem, and it has been in every address book ever built. Tue, 04 Aug 2026 00:00:00 GMT