Sandbox org
Invite acceptance seeds Dahlia-shaped demo data so Store and tenancy flows have something real to open.
What Playground is for
Invited partners and internal builders use Playground to build and dogfood Atrium Store apps end to end: catalogue listing, sandbox tenancy data, hosting provision, and developer portal flows. It is intentionally isolated — credentials, orgs, and Redis/SQL are not shared with production.
Store + portal
Browse and connect apps from the sandbox Store; manage partner identity from /atrium/developer.
Hosted samples
Exercise Atrium Hosting and sample apps (for example birthday and Go hosts) against this environment.
Invite only
Every Playground account starts with an invite from COHO — there is no public registration here. Production is live customer data and is never shared with this environment. If you need access, ask your COHO partner contact.