gplay apps (registry + app details)

Two jobs: gplay's local registry of packages, and an app's App details record. Shared conventions are in gplay-cli-usage.

Local registry vs. server-side discovery

Two different questions, two commands:

• apps list: gplay's local registry, the packages you apps add-ed (the Publisher API has no list endpoint).
• apps accessible list: what the credential can reach, server-side. The two sets need not coincide: bootstrap from the second, then apps add what you drive.

Registering and managing packages