The Build Cache Was Not Broken
Docker cache problems are often not Docker problems. They are usually Dockerfile problems: unstable inputs, bad COPY order, and layers that depend on too much.
CI
Runners, workflows, flaky tests, and the slow realization that your CI pipeline is a distributed system that nobody owns. What breaks, what costs money, and what to do about it.
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The CI Pipeline Nobody Owns
Your CI pipeline is building the same Docker image three times per run, a dependency bot just DDoS’d your runner fleet, and nobody’s going to fix it — because nobody owns it. How shared pipelines corrode without a single bad decision.