The Dependency That Wasn’t
The connectors repo had a cloud-events submodule that existed for one reason: to keep casehub-connectors-core free of casehubio dependencies. The adapter needed cloudevents-core for the CloudEvent types, and the only way to get it was through casehub-platform-api. A separate module kept that dependency off core’s classpath.
Except the adapter doesn’t use anything from casehub-platform-api. I went through every import — CloudEvent and CloudEventBuilder come from cloudevents-core, which is an independent CNCF standard library. The CDI annotations come from quarkus-arc. Jackson comes from Jackson. The adapter depends on casehub-platform-api the way you depend on a shopping bag when what you actually need is the groceries inside it.
The fix was obvious once the problem was framed correctly: core depends on cloudevents-core directly. No casehubio artifact involved. The “tension” between adapter-in-core and zero-casehubio-deps dissolves — both hold simultaneously because the dependency was never a casehubio dependency in the first place.
This also forced a correction to ARC42STORIES. The §1 quality goal said “Zero-dep core” and §2’s constraint said “zero non-JDK runtime dependencies.” Both were already wrong — core has depended on quarkus-arc since day one. The real invariant was always no casehubio dependencies, not zero dependencies. I rewrote both to name the actual invariant: “Lightweight foundation — CDI + external standards only; no casehubio dependencies.” The new constraint is testable: grep core’s dependency tree for io.casehub and verify it returns nothing.
One thing caught during review: the adapter injects ObjectMapper via CDI, but jackson-databind alone doesn’t provide a CDI producer. The webhook module’s @QuarkusTest augmentation discovered the adapter through Jandex, tried to resolve the ObjectMapper injection point, and failed with a class-loading error in a module that didn’t change. The fix was quarkus-jackson instead of raw jackson-databind — it provides the producer without pulling in REST infrastructure.
The whole change is net negative: four commits, 33 lines added, 98 deleted. One submodule gone, one class renamed and moved, six ARC42STORIES sections updated to stop claiming something that was never true.