Hands-on tutorials for Claude Code, AI agents, cloud and system design
A look at how Reddit works. Reddit is one of the most-visited sites on the internet running on a stack most modern engineers would call heresy: Python monoliths, Postgres, Varnish, and a 90%+ edge-cache hit rate that means most requests never touch an application server at all. The architecture is a love letter to caching… Continue reading
TL;DR 30 sec8 min coredeep dive optional Prompt caching on Amazon Bedrock charges 25 percent more to write a cached prefix and 90 percent less to read it back, so any context you reuse within the TTL bills at a fraction of the standard input rate. Cache reads cost 90 percent less than standard input… Continue reading
TL;DR 30 sec3 min coredeep dive optional Anthropic shipped 23 Claude Code releases in three weeks (2.1.243 through 2.1.273, August 24 to September 15 2026), and the month belongs to three stories: Fable 5.1 became the default Fable model, prompt-cache stability work touched at least ten releases, and permission deny rules were extended twice and… Continue reading