LLM Engineering •
OpenAI Python HTTPX2 Migration: Fix the TLS Trap First
The OpenAI Python HTTPX2 migration breaks certifi TLS in containers and proxies. The full checklist, OS trust store fix, and legacy escape hatch.
6 min read
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Web Engineering •
Zero downtime database migration: 5 flags and a 17x P90 gap
A zero downtime database migration is five feature-flagged phases, not a cutover. P95 said 4x slower, P90 said 17x, and the comparison code took a region down.
12 min read
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Web Engineering •
TailwindCSS v4 Migration Guide: Breaking Changes & the @theme Config
TailwindCSS v4 migration, done right: every breaking change, the new CSS-first @theme config that replaces tailwind.config.js, and a step-by-step upgrade path.
3 min read
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