The 2026-06-26 design kept the key env-only. The file is now an explicit fallback: SCADABRIDGE_API_KEY (non-blank) -> ScadaBridge:ApiKey (non-blank, trimmed) -> not configured. Env-only stays the recommended production posture; the failure message names both sources.
Claude-Session: https://claude.ai/code/session_013L3XdmVii9i5sY4FChU8pB
Deep-scan catalog of every environment variable ScadaBridge reads (Host, CLI,
DelmiaNotifier, EF design-time tooling, test/CI harness) plus supporting infra
containers. Each entry carries scope (Runtime/Design-time/Test/Infra), whether a
shipped appsettings key already exists for it, consumer, purpose, potential
values, and required-ness. Compiled from GetEnvironmentVariable call sites, the
Host AddEnvironmentVariables() source, docker/docker-env2 compose, install.ps1,
and all appsettings*.json.
Joseph Doherty