Description

Add a new OpenTelemetry auto-instrumentation for Langchain Library. This instrumentation will greatly improve the observability and tracing capabilities of the Langchain based applications.

Details

• Instrumentation Name: instrumentation-langchain
• Description: This instrumentation will provide automatic tracing and observability for the Langchain Library.
• Language: TypeScript

Motivation

Adding this instrumentation will allow seamless integration of OpenTelemetry with Langchain enabling better visibility into chains which will be represented as workflows/traces in tracing data and Traceloop dashoard.

High Level Instructions

1. Add a new package in this monorepo which should called instrumentation-langchain, with the same structure/boilerplate of instrumentation-openai.
2. Implement the auto instrumentation such that (quite similar to the instrumentation logic in the python sdk):

• Every chain in Langchain will produce a span with the name <chain class name>.task
• Traceloop Span Kind attribute from the semantic-convetions should be set to task and the span name is <chain class name>.task.
• Propagate also the Workflow Name and Correlation Ids as well.
• Produce workflow span For SequentialChain & RetrievalQA chains.

3. Integrate the above implemented instrumentation within traceloop-sdk
4. Add tests

Checklist

Please make sure the following criteria are met:

• I have searched the existing issues and confirmed that this request is not a duplicate.
• I have provided a clear and concise description of the requested instrumentation.
• I have explained the motivation and benefits of adding this instrumentation.
• I have included any additional information or resources that may be relevant.

Thank you!