very excited for this one! a year ago, most of what was being traced to LangSmith was 'LLM apps'. now everything is becoming an agent. with …

very excited for this one! a year ago, most of what was being traced to LangSmith was "LLM apps". now everything is becoming an agent. with that shift, it's getting harder to know what your software is doing from a UI, and more important to automatically assess quality/perf/security and other dimensions you care about we're launching evaluator libraries today! New in LangSmith Evaluation: ✅ Evaluator template library ✅ Reusable evaluators Everything you need to know → https://www.langchain.com/blog/reusable-langsmith-evaluator-templates?utm_source=x&utm_medium=social

@hwchase17 Agent harnesess will simplify multi-agent orchestration and it is finally the next big thing, albeit it looks different from what…
Just read @hwchase17’s excellent thread on why agent harnesses are becoming the dominant way to build agents and why they’re intimately tied…
im excited about agent harnesses because i think are the first stable agent abstractions we can build on top (which is why we're investing s…
The ‘agent harness’ is essentially the new runtime. It’s like a lightweight OS around an LLM—handling memory, tool calls, retries, and contr…
@hwchase17 Exactly. he harness is where the 'soul' of the agent lives. Excited to see how Deep Agents and LangChain can keep pushing this la…
This is one of the most important pieces written about agents this year. Your harness = your memory. If you don’t own the harness, you don’t…

Source: Harrison Chase (X) | 2026-04-16

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