serhiykucherenko.dev

ship log

everything that shipped or changed — newest first

wroteshippedmilestone

sep 07

shipped

6 systems · 10 questions

Six-system RAG comparison harness

payments-rag vs file_search, NotebookLM, Haystack, LlamaIndex, LangChain · one adapter, one golden set

sep 07

wrote

4th on accuracy, 1st on cost and speed

Comparing RAGs, Part 2: the benchmark

read on linkedin ↗

also on dev.to ↗ · hashnode ↗

sep 04

wrote

6 systems, 1 golden set

Comparing RAGs, Part 1: the framework

read on linkedin ↗

also on dev.to ↗ · hashnode ↗

aug 21

wrote

65,930 → 1,948 words (34x)

How to hurt yourself with AI

read on linkedin ↗

also on dev.to ↗ · hashnode ↗

aug 14

wrote

refusal 0 · fabrication 0

Judge strictly to avoid hallucinations

read on linkedin ↗

also on dev.to ↗ · hashnode ↗

aug 09

wrote

495 → 484 chunks, 0.60 → 0.60

The illusion of improvement

read on linkedin ↗

also on dev.to ↗ · hashnode ↗

jul 31

wrote

4.9 ms of 2,823 ms

Three small lessons from building a RAG by hand

read on linkedin ↗

also on dev.to ↗ · hashnode ↗

jul 24

wrote

When 60% recall meant 90% accuracy: a RAG measurement story

read on linkedin ↗

also on dev.to ↗ · hashnode ↗

jul 20

shipped

payments-rag demo went live

rag.serhiykucherenko.dev · fly.io · pgvector + claude

jul 19

milestone

100/100

Site launched, built static

cloudflare · lighthouse 100 · 0 trackers

jul 17

wrote

10,137 ms → 27 ms

The localhost trap: a 10-second database connection on Windows

read on linkedin ↗

also on dev.to ↗ · hashnode ↗