LangChain Labs lead teaches a 38-minute evals masterclass: tasks + verifiers
LangChain · x · 2026-09-15
LangChain shared a 38-minute masterclass where Vtrivedy10, who leads Labs at LangChain, teaches businessbarista all about evals — prompted by friends calling him an "idiot" for not understanding them.
Easy Mode — what an eval is:
- Definition: did the AI agent do the job correctly?
- Two building blocks: 1) Tasks — checkable jobs (log the meeting, draft the email, find Acme across the right Salesforce tables); 2) Verifiers — something that judges right/wrong afterward (a script, another model, a human with a checklist)
Hard Mode covers environments (truncated in source). A solid systems-level intro to agent eval engineering.
Related event: LangChain Labs Lead Gives 38-Minute Masterclass on Agent Evals(2 posts)→
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