The C4 Model – Misconceptions, Misuses & Mistakes
summary
C4 defines four concrete abstractions — software systems, containers, components, code — created around 2007 and intentionally unchanged; it’s notation- and tooling-independent but scales best when treated as a model (not a thousand diagram styles). Advice: prefer the top two levels for most work, model microservices as an API+database pair or as separate software systems depending on ownership, represent topics as data stores for message-driven designs, avoid drawing shared libraries as independent containers. Tools like Structurizr models-as-code generate per-service views and interactive graphs.
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chapters (15)
- 0:00Intro
- 0:44C4 Model
- 5:52What the C4 Model is
- 7:22Notation
- 10:01Viewpoints
- 13:01Abstractions & naming
- 14:18"C4 is too limiting"
- 19:03Abstraction vs organization
- 21:56Message-driven architectures
- 23:54Shared libraries
- 25:27Micro frontends & microservices
- 33:13The C4 Model at scale
- 36:54Dependencies to "external" containers
- 39:58Takeaways
- 40:22Outro
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