I used all four in real projects. One wrecked a monorepo at 3am. Another saved my ass in production. Here's the unfiltered truth about every major package manager in 2025.
Actuator isn't the problem. The mistake is adding it to a project with no clear exposure policy. Here I break down which endpoints to enable, which to block, and what decisions to make before the first deploy.
strict: true is not enough — and it's not the whole story. A flag-by-flag breakdown of what each strict mode option actually does, what bugs it prevents, and the order to enable them in an existing codebase.
Auth tutorials show you the happy path. The real problems in digital identity show up in revocation, state-change propagation, and the trust model. A decision guide from the inside.
When a digital signature fails, the instinct is to look at cryptography. Most of the time the problem is format or validation policy. Here I separate the three layers so the next error doesn't cost you hours.
A system prompt isn't documentation for the model — it's a contract. After several redesigns, I landed on a format with fixed sections, explicit limits, and dynamically injected context. Here's what survived and why.
A healthcheck that only says "the process is responding" can hide serious business-level failures. Let's break down what the HEALTHCHECK instruction actually promises, where the standard recipe falls apart, and how to use it as the limited operational signal it really is — not as a guarantee of heal
Same backend, same database, same k6. In the first runs it looked like Embedded GlassFish was on top. When I fixed JDK, warmup, window, heap, and DB attribution, the story changed: Spring Boot ended up with the best local profile for this workload. Payara Micro was the cleanest Jakarta EE by check failures. GlassFish surprised by being viable.
Prisma query logs help you catch patterns, but if the problem lives inside PostgreSQL, the ORM won't show it to you. Here I break down when Prisma logging is enough and when you need to instrument the database directly.
32 years in the dev trenches. Here I write what I learned, what I broke, and what nobody tells you in the tutorials.
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