Observability Evaluation AI Operations Production AI Systems

Monitoring Agents in Production: What to Track and Why It’s Different

Learn how to monitor AI agents in production by focusing on conversation-level signals, multi-step trajectories, and real user interactions rather than traditional system metrics. The article explains why agent observability differs from standard APM due to infinite input space and non-deterministic LLM behavior, and highlights the need to capture prompt-response pairs, multi-turn context, and tool usage traces. It also outlines how production traces become the foundation for continuous improvement and scalable evaluation, combining automated evals with selective human review to maintain quality at scale.

Deploying Long-Horizon Agents in Production with Durable Execution and Deepagents Deploy

Learn how to deploy long-running AI agents reliably using purpose-built runtime infrastructure. This guide explains durable execution for resuming agent workflows after failures, checkpoint-based memory for short- and long-term state, human-in-the-loop interruption and resumption, and production-grade observability with tracing and replay. It details how LangSmith Deployment (LSD) and Agent Server provide primitives like task queues, persistence via PostgreSQL, RBAC-based multi-tenancy, middleware guardrails, streaming, and cron scheduling. Discover how deepagents deploy packages these capabilities to eliminate infrastructure overhead and enable scalable, fault-tolerant agent systems.

Reusable Evaluators and Template Library: LangSmith Eval Updates

LangSmith introduces reusable evaluators and a library of 30+ evaluator templates to standardize and scale agent evaluation across projects. Teams can define evaluation logic once and apply it across tracing workflows, ensuring consistent safety checks, response quality metrics, and trajectory validation. The templates cover safety (prompt injection, PII, toxicity), response quality, multi-step agent trajectories, user behavior analysis, and multimodal outputs. These evaluators support both online monitoring of production traffic and offline experimentation, enabling teams to detect failures, analyze agent decisions, and continuously improve performance without rebuilding evaluation logic from scratch.

Better-Harness: Using Evals to Iteratively Improve Agent Harnesses

Use evaluation-driven feedback loops to iteratively improve agent harnesses and achieve better generalization in production. Better-Harness treats evals as training data for agents, where each test case provides a learning signal to optimize prompts, tools, and workflows. The system combines curated eval sourcing (hand-written cases, production traces, external datasets), structured tagging for behavioral coverage, and holdout sets to prevent overfitting. It introduces a compound system approach—data sourcing, experiment design, optimization, and human review—to continuously refine agent performance. Key practices include mining production traces for failures, using tagged eval subsets for cost-efficient testing, and pairing automated improvements with human validation to avoid reward hacking and ensure real-world reliability.