P.01GPT-5.6 Sol runs on Cerebras wafer-scale hardware at up to 750 tokens per second, roughly 10x typical GPU inference. Who that speed is actually for.
P.02A single GraphQL schema works until several teams own different parts of the data. What federation solves, how Apollo composes subgraphs, and the cost.
P.03Read replicas are the standard fix for read load, but they open a gap between writing data and reading it back. What lag breaks, and how to design around it.
P.04When a transaction spans services you can't wrap it in one database transaction. Sagas use local transactions plus compensating actions. When that pays.
P.05Vite 8 replaced its dual esbuild and Rollup setup with Rolldown, a Rust bundler, by default. What changed, the real build times, and whether migrating pays.
P.06Idempotency keys let a client retry a request that may have already succeeded, without double-charging a card. The pattern, in Postgres and in Redis.
P.07CQRS separates the path that changes data from the path that reads it. It solves real problems and is heavily over-applied. When it earns its complexity.
P.08An N+1 bug turns one page load into hundreds of round trips. What causes it, how to spot it in Django, Rails, and Prisma, and the eager-loading fixes.
P.09OAuth handles authorization, OIDC adds identity on top, and SAML is the older enterprise SSO standard still running much of the corporate world. How to pick.
P.10PostgreSQL 19 Beta 1 adds REPACK, which rewrites bloated tables without a maintenance window, plus parallel autovacuum and smarter async I/O.
P.11Astro 6.4 ships a pluggable markdown pipeline and Sätteri, a Rust processor that speeds up content-heavy builds. It can't run your remark plugins yet.
P.12A circuit breaker stops your app hammering a failing dependency until it recovers. The three states, a minimal implementation, and how retries differ.