Dev Tools · 1h ago
Build the rubric, buy the runner: lessons from a DIY LLM eval framework
A developer built an LLM eval framework in 200 lines of Python, only to see it devolve into a mess of parsing hacks and stale datasets. The key insight: build domain-specific rubrics, datasets, and gating rules, but buy the generic evaluation runner. The author estimates rebuilding the runner cost most of a year.
Meridian48 take
The article's core advice—build what's specific to your domain, buy generic infrastructure—is sound, but the 'buy' part glosses over the fact that many teams still struggle to find mature, off-the-shelf eval runners.
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I built an LLM eval framework from scratch. Here is what I wish I had bought instead. →
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