langchain-observability
Wire LangSmith tracing and custom metric callbacks into a LangChain\ \ 1.0 chain\nor LangGraph 1.0 agent correctly \u2014 env-var spelling, subgraph\ \ propagation,\nper-tenant dimensions, cost and latency counters. Use when setting\ \ up\nobservability on a new service, debugging blank traces in LangSmith, or adding\n\ per-tenant cost breakdowns. Trigger with \"langchain observability\",\n\"langsmith\ \ tracing\", \"langchain callbacks\", \"langchain metrics\".\n"
npx skills add jeremylongshore/claude-code-plugins-plus-skills --skill langchain-observability --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# LangChain Observability (Python) ## Overview Engineer sets `LANGCHAIN_TRACING_V2=true` and `LANGCHAIN_API_KEY=...` from the 0.2 docs, restarts the service, and sees zero traces in LangSmith — no errors, no warnings. That is P26: in LangChain 1.0 the canonical env vars are `LANGSMITH_TRACING` and `LANGSMITH_API_KEY`. The `LANGCHAIN_*` names are soft-deprecated and fail silently on any chain that
What does the langchain-observability skill do?
Wire LangSmith tracing and custom metric callbacks into a LangChain\ \ 1.0 chain\nor LangGraph 1.0 agent correctly \u2014 env-var spelling, subgraph\ \ propagation,\nper-tenant dimensions, cost and latency counters. Use when setting\ \ up\nobservability on a new service, debugging blank traces in LangSmith, or adding\n\ per-tenant cost breakdowns. Trigger with \"langchain observability\",\n\"langsmith\ \ tracing\", \"langchain callbacks\", \"langchain metrics\".\n"
How do I install it?
Run `npx skills add jeremylongshore/claude-code-plugins-plus-skills --skill langchain-observability --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From jeremylongshore/claude-code-plugins-plus-skills, a repository with 2,596 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.