Your AI Agent Said 'Done.' Here's How I Found Out It Actually Failed Three Hours Later.

Short summary

An AI agent sent 47 incorrect pricing emails silently—three hours passed before a human noticed. Most frameworks log that agents 'ran' but never verify they actually succeeded. The author shares a four-part observability pattern: session trace IDs for correlation, tool-call validation to catch wrong parameters, completion checks to reject nonsense, and budget limits to prevent runaway execution.

• •Real incident: AI agent silently failed, sending 47 incorrect emails to customers before anyone noticed after three hours
• •Root cause: Most frameworks lack observability to distinguish between agent execution and agent success
• •Solution: Four-part pattern with code—session trace IDs, tool validation, completion assertions, and budget limits

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