Engineering notes
Articles for people who
ship the stack
Rewrites on React, Node.js, TypeScript and AI. A translated body is shown when it exists. If it does not, you see the English text and a note that says so.
Tagged: metrics
Your Semantic Model Is the API: Giving Agents Certified Metrics
Why AI agents invent private definitions of revenue and inventory, and how a governed semantic model with grain, owners and refusals gives them one contract.
22 min readLLM Monitoring in Production: Metrics, Quality, Cost, Safety
LLM monitoring in production: SLIs for latency, errors, tokens, groundedness and safety, plus observability alerts that catch quiet quality decay early.
11 min readSix RAG evaluation metrics that matter in production
Six RAG evaluation metrics for production: Recall@K, nDCG, MRR, faithfulness, latency and cost, and how retrieval can improve on paper while answers worsen.
10 min read
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