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As this came up in my timeline again today, here's what I think is the gist of the problem I see with consumer-driven-contracts (#CDC). Thread…
1/ With #CDC you fundamentally establish a customer / supplier relationship in DDD strategic design terms with the API provider ending up as customer (downstream) and the client as supplier (upstream). That means you end up with *multiple* upstreams for a *single* downstream.
2/ This might sound counterintuitive first and like a detail but has important consequences: there's significant coordinating and disambiguation work this setup imposes on the API provider. *It* has to moderate potentially conflicting requirements. It serves multiple masters.
