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Engineering notes

What we learn putting systems into production: evaluation, costs, guardrails, operations.

Schéma VisioDev des dépendances entre LangChain, LangGraph, langchain-core et LangSmith
FEATURED · AI · 10 MIN

LangChain and LangSmith: building and steering AI agents

LangChain is for building AI agents; LangSmith is for observing, evaluating and deploying them. This guide explains what each tool does, how they depend on each other, what they cost and where your data goes.

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2 articles · AI

Our deep dives

Downloadable resources

PDF · 4 PAGES

AI scoping checklist

Twelve questions to ask before funding an AI project — and the answers that should raise a red flag.

PDF · 6 PAGES

Cloud selection matrix

Compare AWS, Azure and GCP on your own criteria: cost, sovereignty, available skills.

DOCX

Requirements template

A ready-to-fill outline for consulting several vendors on a comparable basis.

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Our field notes on AI and cloud. No spam.

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We apply these lessons with our clients — and we teach them in our training courses.

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