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feat: add LangSmith tracing integration (#878)

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* feat: add LangSmith tracing integration

Add optional LangSmith tracing support that can be enabled via environment
variables (LANGSMITH_TRACING, LANGSMITH_API_KEY, LANGSMITH_PROJECT,
LANGSMITH_ENDPOINT). When enabled, a LangChainTracer callback is attached
to chat models and run metadata is injected for trace tagging.

Co-Authored-By: Claude <noreply@anthropic.com>

* Update backend/src/config/tracing_config.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update backend/src/agents/lead_agent/agent.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update backend/src/agents/lead_agent/agent.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update backend/src/models/factory.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Add threading lock to ensure thread-safe access to tracing configuration

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Willem Jiang <willem.jiang@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
This commit is contained in:
CHANGXUBO
2026-02-21 16:41:34 +08:00
committed by GitHub
parent 75226b2fe6
commit 85af540076
4 changed files with 84 additions and 1 deletions
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11
backend/src/agents/lead_agent/agent.py
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@@ -245,6 +245,17 @@ def make_lead_agent(config: RunnableConfig):
subagent_enabled = config.get("configurable", {}).get("subagent_enabled", False)
max_concurrent_subagents = config.get("configurable", {}).get("max_concurrent_subagents", 3)
print(f"thinking_enabled: {thinking_enabled}, model_name: {model_name}, is_plan_mode: {is_plan_mode}, subagent_enabled: {subagent_enabled}, max_concurrent_subagents: {max_concurrent_subagents}")
# Inject run metadata for LangSmith trace tagging
if "metadata" not in config:
config["metadata"] = {}
config["metadata"].update({
"model_name": model_name or "default",
"thinking_enabled": thinking_enabled,
"is_plan_mode": is_plan_mode,
"subagent_enabled": subagent_enabled,
})
return create_agent(
model=create_chat_model(name=model_name, thinking_enabled=thinking_enabled),
tools=get_available_tools(model_name=model_name, subagent_enabled=subagent_enabled),