Comparing a value to the previous event is the thing I look up every single time. streamstats current=f is the whole trick — sort first, because it trusts the order it is given.
| streamstats current=f last(value) as prev | eval delta = value - prev
A twenty-line CLAUDE.md at the repo root replaced about ten prompts of pasted context for me. Mine is just conventions, the two commands that matter, and what not to touch.
Two weeks of “why is the cache never hit” and the answer was the key, not the action: I was hashing the lockfile after a step that rewrote it. Short version for future me.
I kept a practice log to see whether slow scales actually help. They do, but not in the way I expected — the tempo I can play cleanly moved less than the number of takes I needed.