Archive

Long-exposure light trails of cars driving at night

September 13, 2026

A number that you see is a number that you can directly control

Last week, I wrote about prompt cache discipline in Claude Code. I followed the rules by quickly checking the numbers, now I can directly see them.Release v2.1.151 from Anthropic adds a prompt cache line to /cost (or /usage). It shows the number of requests, hit ...

Blackboard with a math lesson written on it

September 13, 2026

Claude Code – Initial considerations on cache and token optimization

Over the last few weeks, I have been exploring more in Claude Code and the user community growing around it.I’ve been experimenting with common tasks such as implementing small features and debugging old code, but also experimenting (in a quite non-scientific way) with the different ...