Tutorials, stack comparisons, tool reviews, and productivity tips — code that ships.
The rebase-vs-merge debate is a proxy for a more useful question: what should the history of `main` look like a year from now? Here is the policy that answers it, applied to feature branches, long-lived branches, and the cases where you really should preserve the merge.
Distributed tracing only earns its keep at 3 a.m., when one slow request is hiding in a microservice call graph. Here is the OpenTelemetry setup for Node.js that auto-instruments the boring stuff, lets you add the span attributes that matter, and connects to any backend you point it at.
Most teams have one feature-flag system and four kinds of flags pretending to live in it. Release toggles, ops toggles, permission toggles, and experiments behave differently, decay differently, and need different cleanup rules. Here is the taxonomy that prevents flag debt from eating your codebase.
Most API developers think “HTTP caching” means putting things in Redis. The browser, the CDN, and your reverse proxy already implement a four-decade-old caching protocol; you just have to set the right headers. Here is the cheat-sheet of Cache-Control, ETag, Last-Modified, and the conditional-request flow that makes JSON endpoints feel instant.
Postgres falls over not because of slow queries but because of too many connections. Most teams reach for pgbouncer and copy a config they do not understand. Here is the actual job each setting does, the three pool modes ranked by what they break, and the rule for sizing pool_size that holds at any traffic level.
JSONB columns let you ship features without a migration, which is exactly why they end up holding half your domain model. Here is the rule for when JSONB is the right call, the four queries that decide whether to promote a key to a column, and the GIN-index pattern that keeps it fast.
Half the production incidents that start with “but the script said it succeeded” come from the same three missing lines at the top of a bash file. Here is what set -euo pipefail actually does, the traps it has, and the deploy-script pattern that fails loudly instead of quietly succeeding.
Most developers run EXPLAIN ANALYZE, see a wall of nested operators and millisecond numbers, and either guess or scroll past. Here is the line-by-line read of a real plan, what every node means, and the four numbers that decide whether you need an index or a rewrite.