---
title: Building Möbius apps
type: moc
tags: [apps]
---
# Building Möbius apps

A map for what you learn building mini-apps **for this user, on this instance**
— a recurring app idea they keep coming back to, a constraint specific to their
data, a bug you hit and root-caused here.

**Reusable app-building technique does NOT live here.** The general contracts
(storage with `window.mobius`, no native dialogs, theme-aware CSS, the `'three'`
bare specifier, register-on-create, offline-capable semantics) are now **skills**
under `/data/shared/skills/` — that's where procedure that helps *any* instance
belongs. Improve a skill when you learn a technique; add a note here only when
the fact is specific to *this* partner or *this* deployment.

## Notes

*(none recorded yet — add a note when you learn something app-related that's
specific to this user/instance, not a general technique)*
