Jun 6, 2026 Your domain layer imports Postgres. Your CI doesn't care. Clean architecture diagrams look great on a whiteboard. deep-divesclean-architectureci-cddependency-rules
Jun 5, 2026 Your Architecture Diagram Is Already a Lie Architecture documentation rots the moment you save it. Here's how to keep docs honest using code-generated diagrams, ADRs, and automated architecture tests. deep-divesarchitecturedocumentationliving-docs
Jun 4, 2026 Your retry loop assumes the first request failed. It probably didn't. A timeout or crash does not mean your API request was lost. deep-divesidempotencyapi-designresilience
Jun 3, 2026 A lock that outlives your process: how distributed leases actually work In-memory mutexes vanish when your server restarts. Here's how distributed leases with fencing tokens and TTLs prevent duplicate work across crashes, and... deep-divesdistributed-locksleasingresilience
Jun 2, 2026 A circuit breaker with no goroutines, no timers, and no background overhead Most circuit breaker libraries spawn background threads to probe for recovery. You don't need them. deep-divescircuit-breakerperformanceresilience
Jun 1, 2026 Your Web Service Has a Graceful Shutdown Path. That's the Bug. Crash-only software treats every failure as a crash and every startup as a recovery. deep-divescrash-only-softwareresiliencedistributed-systems
May 31, 2026 How to Kill a Surviving Mutant When You Don't Understand What It Changed Mutation testing found a survivor and you have no idea what the mutation even does. deep-divesmutation-testingtest-writingdebugging
May 30, 2026 Auth code needs 90% mutation coverage. Your string utils don't. Why enforcing a single mutation score across your entire codebase is a mistake, and how to set per-module thresholds that match actual risk. deep-divesmutation-testingauthtest-quality
May 29, 2026 Your Tests Pass. Your Mutation Score Is 40%. Here's What Surviving Mutants Are Actually Telling You. Code coverage says you're safe. Mutation testing says your tests are mostly decoration. Here's how surviving mutants expose the gap, and how to close it. deep-divesmutation-testingsurviving-mutantstest-quality
May 28, 2026 Mutation Testing in Rust Works, but Your Compile Times Will Hate You cargo-mutants finds the tests that only pretend to verify your code. deep-divesmutation-testingrustcargo-mutantstest-quality
