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langchain - 💡(How to fix) Fix Add Vequil to integrations/callbacks — anomaly detection + cost tracking for LangChain agents

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Error Message

Captures: tool start/end/error, LLM call start/end, chain errors, token usage.

Code Example

from vequil import VequilClient
from vequil.integrations.langchain import VequilCallbackHandler

vq = VequilClient(workspace_key="vk_ws_...")
handler = VequilCallbackHandler(vq, agent_id="my-chain")

result = chain.invoke(
    {"input": "What is the weather in SF?"},
    config={"callbacks": [handler]},
)

---

pip install vequil
# or with the langchain extra:
pip install "vequil[langchain]"
RAW_BUFFERClick to expand / collapse

What is Vequil?

Vequil is a reliability and observability layer for AI agent operators. It detects anomalies in real time (logic loops, retry storms, cost spikes, blocked tool calls), tracks spend by agent and tool, and generates shareable weekly report cards.

The integration

The vequil Python package includes a BaseCallbackHandler subclass that works drop-in with any LangChain chain, agent, or LLM call:

from vequil import VequilClient
from vequil.integrations.langchain import VequilCallbackHandler

vq = VequilClient(workspace_key="vk_ws_...")
handler = VequilCallbackHandler(vq, agent_id="my-chain")

result = chain.invoke(
    {"input": "What is the weather in SF?"},
    config={"callbacks": [handler]},
)

Captures: tool start/end/error, LLM call start/end, chain errors, token usage.

Install

pip install vequil
# or with the langchain extra:
pip install "vequil[langchain]"

Links

Request

Would love to be listed on the callbacks integrations page. Happy to submit a PR with docs if you can point me to the right location in the repo (I couldn't find a docs/ directory in the main repo — is it a separate repo?).

extent analysis

TL;DR

To resolve the issue, the user needs to find the correct location for submitting a PR with documentation to be listed on the LangChain callbacks integrations page.

Guidance

  • Check the LangChain repository for a docs/ directory or a similar location where documentation for integrations is stored.
  • Look for a contributing guide or README file in the LangChain repository that provides information on how to submit a PR for documentation changes.
  • If the docs/ directory is not found in the main repository, search for a separate repository that might contain the documentation.
  • Reach out to the LangChain community or maintainers for guidance on where to submit the PR if the location cannot be found.

Notes

The solution depends on finding the correct location for submitting the PR, which may require some investigation and potentially reaching out to the LangChain community.

Recommendation

Apply workaround: Reach out to the LangChain community or maintainers for guidance, as this will likely provide the most direct path to finding the correct location for submitting the PR.

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#chain error#indexing error#inference speed#output truncation#response parsing

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langchain - 💡(How to fix) Fix Add Vequil to integrations/callbacks — anomaly detection + cost tracking for LangChain agents