LangSmith Becomes the Debugging Backbone for Coding Agents
hwchase17 · x · 2026-07-16
The author shares their experience using LangSmith tracing across multiple coding agents and custom plugins.
- They have been using it continuously for several months.
- Many architectural and debugging decisions are now made by inspecting traces first.
- Core viewpoint: If you can't see it, you can't optimize it.
- Additionally, LangChain noted that after connecting the Codex session tracing plugin to LangSmith, every round of tool calls, token usage, and subagent threads become trackable, real traces, requiring just two config blocks and a single toggle.
Related event: LangSmith adds tracing for coding agents(6 posts)→
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