proviras-sdk 2.1.2

Proviras tracing SDK for LangGraph and LangChain agents

proviras-sdk (Python)

Trace LangGraph and LangChain runs to Proviras.

ProvirasTracer is a langchain_core.tracers.base.BaseTracer you pass as a callback. It creates one Proviras session per graph invocation and streams each LLM, tool, chain, and retriever run to your dashboard as a TraceCall.

Install

pip install proviras-sdk

langchain-core>=0.3.0 is pulled in automatically. Your project already has it if you use LangGraph or LangChain.

Setup

export PROVIRAS_PARENT_ID=<your-proviras-user-id>
export PROVIRAS_PLATFORM=langgraph

variable	required	description
PROVIRAS_PARENT_ID	yes	your Proviras user ID
PROVIRAS_PLATFORM	yes	runtime platform (e.g. langgraph, langchain)
PROVIRAS_USER_ID	no	parent agent ID when this agent is spawned by another

Usage with LangGraph

from proviras_sdk import ProvirasSdk
from langgraph.graph import StateGraph

sdk = ProvirasSdk()
graph = ...  # build your StateGraph

tracer = sdk.trace("Answer user question")

result = graph.invoke(
    {"messages": [{"role": "user", "content": "..."}]},
    config={"callbacks": [tracer]},
)
# session is finalized automatically when the root run ends

sdk.trace(task_description) returns a ProvirasTracer. It:

1. Registers your agent on first run (saves agentId to ~/.proviras/config.json).
2. Creates a session: POST /api/agent/session.
3. On each completed LangChain run, posts a trace: POST /api/agent/session/{id}/trace.
4. When the root run ends, finalizes the session: PATCH /api/agent/session.

Telemetry failures are swallowed — they never break the graph.

What gets captured

For each LangChain Run that completes (run_type of llm, tool, chain, or retriever):

field	source
runType	run.run_type
stepId	run.id
parentTraceId	server-issued traceId of the parent run
timestamp	run.start_time
latencyMs	run.end_time - run.start_time
model	run.extra.metadata.ls_model_name
input / output	JSON-encoded run.inputs / run.outputs, truncated at 8 KB
tokens	run.outputs.llm_output.token_usage (LLM runs only)
error	run.error

Posting happens once at root-run completion, in tree preorder, so a child's parentTraceId is always set correctly before the child is posted.

Per-invocation surface

sdk.trace("nightly summary", surface="code")

surface is one of "cowork" | "chat" | "code" | "api" and defaults to "api".

Async LangGraph

LangChain dispatches sync callback handlers on a worker thread when called from async contexts, so ProvirasTracer works with graph.ainvoke() and graph.astream() without changes. Each HTTP call blocks one worker thread for the duration of the request.