A social network scoped to one residential compound

What we built, and why that shape

The compound, not the user, is the unit that organises the system. A resident registers, then claims the compound they live in; everything else — the forum, the check-in record, the notices — is scoped to that claim, so a discussion thread has a known membership rather than an open audience.

• Resident-facing web client on ASP.NET Core and HTML5, reachable through WeChat, so joining costs a registration rather than an app install.
• Compound claiming as an explicit step: it makes residency a recorded fact the forum and notice features can rely on.
• A separate Pro client in WPF for the operator: bulk import of compounds, user administration and forum moderation. Desktop was the right shape for bulk data work that a browser form handles badly.
• Check-in and notices kept deliberately simple — the value is in reaching a verified set of residents, not in the mechanics of the feature.