[bot] Amazon Bedrock Agents (bedrock-agent-runtime `invoke_agent`) not instrumented

[braintrust-bot]

Summary

This repo instruments boto3's bedrock-runtime service (model invoke/converse) via py/src/braintrust/integrations/bedrock_runtime/, but the separate bedrock-agent-runtime service — which drives Amazon Bedrock Agents' invoke_agent API (multi-step agent orchestration: action-group/tool calls, knowledge-base retrieval, and a returned execution trace) — is explicitly excluded, not just unimplemented.

py/src/braintrust/integrations/bedrock_runtime/patchers.py gates instrumentation with _is_bedrock_runtime_client, which only wraps a client when service_model.service_name == "bedrock-runtime". A boto3.client("bedrock-agent-runtime") client has a different service name and is passed straight through unwrapped, so calls to invoke_agent() (and invoke_flow() for Bedrock Flows) produce no spans at all.

This is a meaningful agent-run execution surface distinct from a single model invoke — it returns a streamed EventStream with agent reasoning/tool-use/observation chunks plus a final output, analogous to what's already traced for other agent frameworks in this repo (e.g. openai_agents, crewai, strands).

Braintrust docs status: unclear. https://www.braintrust.dev/docs/guides/tracing lists "AWS Bedrock" generically among supported providers but does not distinguish Bedrock Agents/invoke_agent from the base model-invoke surface, and no integration page documents agent-orchestration coverage.

What needs to be instrumented

SDK surface	Already traced?
bedrock-agent-runtime client invoke_agent(agentId, agentAliasId, sessionId, inputText, ...)	No
invoke_flow(...) (Bedrock Flows)	No

Upstream sources

• AWS API reference for InvokeAgent: https://docs.aws.amazon.com/bedrock/latest/APIReference/API_agent-runtime_InvokeAgent.html
• boto3 bedrock-agent-runtime client docs: https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/bedrock-agent-runtime.html
• User guide: https://docs.aws.amazon.com/bedrock/latest/userguide/agents-invoke.html

Local repo files inspected

• py/src/braintrust/integrations/bedrock_runtime/integration.py — import_names = ("botocore",), min_version = "1.34.116", only patcher is BedrockClientCreatorPatcher
• py/src/braintrust/integrations/bedrock_runtime/patchers.py — _is_bedrock_runtime_client checks service_model.service_name == "bedrock-runtime", explicitly excluding any other boto3 service name including bedrock-agent-runtime
• py/src/braintrust/integrations/bedrock_runtime/tracing.py — wrappers exist only for converse, converse_stream, invoke_model, invoke_model_with_response_stream
• Repo-wide grep for bedrock-agent, bedrock_agent, invoke_agent under py/src/braintrust/ — the only hit is an unrelated local test helper _invoke_agent in py/src/braintrust/integrations/langchain/test_deepagents.py (a LangChain/deepagents test fixture, unrelated to AWS)
• README.md integrations table — no separate Bedrock Agents entry