LangSmith adds tracing for coding agents

LangChain announced that LangSmith now supports tracing for coding agents including Cursor, Copilot, Pi, and OpenCode. The update is notable because it pulls sessions from different coding assistants into one observability workflow without requiring extra instrumentation. In practice, LangSmith is being positioned more clearly as a debugging and analysis layer for coding agents.

Key details

According to LangChain, users can get full session observability without adding new tracing hooks. LangSmith can use one set of stable keys to identify, group, and query sessions produced by different agents. The traces are not limited to a top-level session view: users can also inspect the full execution tree, including conversation turns, model calls, tool usage, and sub-steps, which helps with troubleshooting and understanding agent behavior.

User feedback

In a repost, hwchase17 relayed feedback from an author who said they had been using LangSmith tracing for several months across multiple coding agents and custom plugins. In that account, many architecture and debugging decisions are now made only after checking the trace first, underscoring the tool’s role in day-to-day development rather than simple log collection.

2026-07-15 ~ 2026-07-16 · 6 related posts

• [source] LangSmith Supports Multi-Agent Coding Tracing — LangChain · 2026-07-15
• LangSmith Becomes the Debugging Backbone for Coding Agents — hwchase17 · 2026-07-16

4 near-duplicate retellings: LangChain · BraceSproul · hwchase17 · LangChain