Configuration
The complete, current guide is Configuration authority.
It covers file selection, precedence, UAR_SECTION__KEY environment names,
schema discovery, provider/model setup, persistence, secret handling, settings
reconciliation, reload, restart boundaries, and runtime profiles.
For task-oriented setup, continue to Installation or Deployment. Native supervisors use an explicit environment file and platform YAML described in Native services; they never source a complete login profile at service startup.