Check out how AppSignal uses the Citadel pattern and how our system works.
Ruby Weekly Issue 496: April 9, 2020
Микросервисы. Не всё то золото, что хайп / Хабр
AppSignal - DHH just coined the term “Citadel” which
The DDA Gives Up on The CITADEL™. What's Next? – East Lansing Info
Citadel
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Citadel Architectural Products, Inc.
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Citadel Architectural Products