feat: add auto-instrumentation to langchain agent template (aws#835)

Author: avi-alpert

src/assets/__tests__/__snapshots__/assets.snapshot.test.ts.snap

@@ -1167,6 +1167,7 @@ Thumbs.db
 exports[`Assets Directory Snapshots > Python framework assets > python/python/a2a/langchain_langgraph/base/main.py should match snapshot 1`] = `
 "from langchain_core.tools import tool
 from langgraph.prebuilt import create_react_agent
+from opentelemetry.instrumentation.langchain import LangchainInstrumentor
 from a2a.server.agent_execution import AgentExecutor, RequestContext
 from a2a.server.events import EventQueue
 from a2a.server.tasks import TaskUpdater
@@ -1175,6 +1176,8 @@ from a2a.utils import new_task
 from bedrock_agentcore.runtime import serve_a2a
 from model.load import load_model
 
+LangchainInstrumentor().instrument()
+
 
 @tool
 def add_numbers(a: int, b: int) -> int:
@@ -1382,6 +1385,7 @@ dependencies = [
     {{/if}}{{#if (eq modelProvider "Gemini")}}"langchain-google-genai >= 2.0.0",
     {{/if}}{{#if (eq modelProvider "OpenAI")}}"langchain-openai >= 0.2.0",
     {{/if}}"aws-opentelemetry-distro",
+    "opentelemetry-instrumentation-langchain",
     "bedrock-agentcore[a2a] >= 1.0.3",
     "botocore[crt] >= 1.35.0",
     "langgraph >= 0.2.0",
@@ -2526,6 +2530,7 @@ exports[`Assets Directory Snapshots > Python framework assets > python/python/ht
 from langchain_core.messages import HumanMessage
 from langgraph.prebuilt import create_react_agent
 from langchain.tools import tool
+from opentelemetry.instrumentation.langchain import LangchainInstrumentor
 from bedrock_agentcore.runtime import BedrockAgentCoreApp
 from model.load import load_model
 {{#if hasGateway}}
@@ -2534,6 +2539,8 @@ from mcp_client.client import get_all_gateway_mcp_client
 from mcp_client.client import get_streamable_http_mcp_client
 {{/if}}
 
+LangchainInstrumentor().instrument()
+
 app = BedrockAgentCoreApp()
 log = app.logger
 
@@ -2825,6 +2832,7 @@ readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
     "aws-opentelemetry-distro",
+    "opentelemetry-instrumentation-langchain",
     "langgraph >= 1.0.2",
     "mcp >= 1.19.0",
     "langchain-mcp-adapters >= 0.1.11",

src/assets/python/a2a/langchain_langgraph/base/main.py

@@ -1,5 +1,6 @@
 from langchain_core.tools import tool
 from langgraph.prebuilt import create_react_agent
+from opentelemetry.instrumentation.langchain import LangchainInstrumentor
 from a2a.server.agent_execution import AgentExecutor, RequestContext
 from a2a.server.events import EventQueue
 from a2a.server.tasks import TaskUpdater
@@ -8,6 +9,8 @@
 from bedrock_agentcore.runtime import serve_a2a
 from model.load import load_model
 
+LangchainInstrumentor().instrument()
+
 
 @tool
 def add_numbers(a: int, b: int) -> int:

src/assets/python/a2a/langchain_langgraph/base/pyproject.toml

@@ -15,6 +15,7 @@ dependencies = [
     {{/if}}{{#if (eq modelProvider "Gemini")}}"langchain-google-genai >= 2.0.0",
     {{/if}}{{#if (eq modelProvider "OpenAI")}}"langchain-openai >= 0.2.0",
     {{/if}}"aws-opentelemetry-distro",
+    "opentelemetry-instrumentation-langchain",
     "bedrock-agentcore[a2a] >= 1.0.3",
     "botocore[crt] >= 1.35.0",
     "langgraph >= 0.2.0",

src/assets/python/http/langchain_langgraph/base/main.py

@@ -2,6 +2,7 @@
 from langchain_core.messages import HumanMessage
 from langgraph.prebuilt import create_react_agent
 from langchain.tools import tool
+from opentelemetry.instrumentation.langchain import LangchainInstrumentor
 from bedrock_agentcore.runtime import BedrockAgentCoreApp
 from model.load import load_model
 {{#if hasGateway}}
@@ -10,6 +11,8 @@
 from mcp_client.client import get_streamable_http_mcp_client
 {{/if}}
 
+LangchainInstrumentor().instrument()
+
 app = BedrockAgentCoreApp()
 log = app.logger
 

src/assets/python/http/langchain_langgraph/base/pyproject.toml

@@ -10,6 +10,7 @@ readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
     "aws-opentelemetry-distro",
+    "opentelemetry-instrumentation-langchain",
     "langgraph >= 1.0.2",
     "mcp >= 1.19.0",
     "langchain-mcp-adapters >= 0.1.11",