KAgent LangGraph Integration

This package provides LangGraph integration for KAgent with A2A (Agent-to-Agent) server support. It implements a custom checkpointer that persists LangGraph state to the KAgent REST API, enabling distributed agent execution with session persistence.

Features

Custom Checkpointer: Persists LangGraph checkpoints to KAgent via REST API
A2A Server Integration: Compatible with KAgent's Agent-to-Agent protocol
Session Management: Automatic session creation and state persistence
Event Streaming: Real-time streaming of graph execution events
FastAPI Integration: Ready-to-deploy web server for agent execution

Quick Start

from kagent.langgraph import KAgentApp
from langgraph.graph import StateGraph
from langchain_core.messages import BaseMessage
from typing import TypedDict, Annotated, Sequence

class State(TypedDict):
    messages: Annotated[Sequence[BaseMessage], "The conversation history"]

# Define your graph
builder = StateGraph(State)
# Add nodes and edges...

# Create KAgent app
app = KAgentApp(
    graph_builder=builder,
    agent_card={
        "name": "my-langgraph-agent",
        "description": "A LangGraph agent with KAgent integration",
        "version": "0.1.0",
        "capabilities": {"streaming": True},
        "defaultInputModes": ["text"],
        "defaultOutputModes": ["text"]
    },
    kagent_url="http://localhost:8083",
    app_name="my-agent"
)

# Build FastAPI application
fastapi_app = app.build()

Architecture

The package mirrors the structure of kagent-adk but uses LangGraph instead of Google's ADK:

KAgentCheckpointer: Custom checkpointer that stores graph state in KAgent sessions
LangGraphAgentExecutor: Executes LangGraph workflows within A2A protocol
KAgentApp: FastAPI application builder with A2A integration
Session Management: Automatic session lifecycle management via KAgent REST API

Configuration

The system uses the same REST API endpoints as the ADK integration:

POST /api/sessions - Create new sessions
GET /api/sessions/{id} - Retrieve session and events
POST /api/sessions/{id}/events - Append checkpoint events
POST /api/tasks - Task management

Deployment

Use the same deployment pattern as kagent-adk samples with Docker and Kubernetes.

Metadata

Release files for kagent-langgraph 0.10.3

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for kagent-langgraph 0.10.3
File	Size	Uploaded
kagent_langgraph-0.10.3.tar.gz	16.5 kB	Oct 2, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for kagent-langgraph 0.10.3
File	Interpreter	ABI	Platform	Reset
kagent_langgraph-0.10.3-py3-none-any.whl 16.9 kB Oct 2, 2026	Python 3	none	any	Details

Total release size: 33.4 kB

Release files / kagent_langgraph-0.10.3.tar.gz

Download URL	kagent_langgraph-0.10.3.tar.gz
Size	16.5 kB
Tags	Source
SHA-256 checksum How to use checksums	`94efe27d65c260e7d19324b14f19779f918ee4dec9ee9f5abe0abded1a8934bc`
BLAKE2b-256 checksum How to use checksums	`6074dc6cba170e80a32171dcd6f608ef29142f95806bb514d9b47b374615b2c2`
Upload date	Oct 2, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`uv/0.12.22 {"installer":{"name":"uv","version":"0.12.22","subcommand":["publish"]},"python":null,"implementation":{"name":null,"version":null},"distro":{"name":"Ubuntu","version":"24.04","id":"noble","libc":null},"system":{"name":null,"release":null},"cpu":null,"openssl_version":null,"setuptools_version":null,"rustc_version":null,"ci":true}`

Release files / kagent_langgraph-0.10.3-py3-none-any.whl

Download URL	kagent_langgraph-0.10.3-py3-none-any.whl
Size	16.9 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`4ee5fa6025df876a04b6cff91a79ba1f115500eb0b24f4e575a8eaf5d6e7adc3`
BLAKE2b-256 checksum How to use checksums	`636264b513723b9270650fad20a3f2166700082f5cedab42837ca37da8c7ee2a`
Upload date	Oct 2, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`uv/0.12.22 {"installer":{"name":"uv","version":"0.12.22","subcommand":["publish"]},"python":null,"implementation":{"name":null,"version":null},"distro":{"name":"Ubuntu","version":"24.04","id":"noble","libc":null},"system":{"name":null,"release":null},"cpu":null,"openssl_version":null,"setuptools_version":null,"rustc_version":null,"ci":true}`