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.

Release files for kagent-langgraph 0.10.1

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 0.10.1
File	Size	Uploaded
kagent_langgraph-0.10.1.tar.gz	16.5 kB	Sep 8, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for kagent-langgraph 0.10.1
File	Interpreter	ABI	Platform	Reset
kagent_langgraph-0.10.1-py3-none-any.whl 16.9 kB Sep 8, 2026	Python 3	none	any	Details

Total release size: 33.4 kB

Release files / kagent_langgraph-0.10.1.tar.gz

Download URL	kagent_langgraph-0.10.1.tar.gz
Size	16.5 kB
Tags	Source
SHA-256 checksum How to use checksums	`1cf3ae8b50c470ad0fdd8ff6ceb17c1fd4370c02015c7925a7e592ba13e46e86`
BLAKE2b-256 checksum How to use checksums	`344ce408e6e68c9cb0209e4130cf947bd966646e496cb5410f70a5bb4fa0093d`
Upload date	Sep 8, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`uv/0.12.10 {"installer":{"name":"uv","version":"0.12.10","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-0.10.1-py3-none-any.whl

Download URL	kagent_langgraph-0.10.1-py3-none-any.whl
Size	16.9 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`8b6780ecc964beed62d978b44a400b6cf7a5a785c245242d28e3d10180c6c40a`
BLAKE2b-256 checksum How to use checksums	`e74db828942cc6646dde799740ecc5514a67013522bb8959041005725408c903`
Upload date	Sep 8, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`uv/0.12.10 {"installer":{"name":"uv","version":"0.12.10","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}`