Panduan Teknis: Freelance Programmer: LangGraph Stateful Agents & Human-in-the-Loop Checkpoints. Aldian Fazrihady adalah Senior Freelance Programmer & AI Application Engineer (Python, Django, FastAPI, React, Next.js, TypeScript, Golang, RAG, MCP, Google ADK).

Build auditable, resumable multi-agent state graphs with PostgreSQL checkpointing by hiring senior freelance programmer Aldian Fazrihady.

from typing import TypedDict, Annotated
import operator

class AgentWorkflowState(TypedDict):
    messages: Annotated[list[str], operator.add]
    pending_refund_cents: int
    manager_approved: bool

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About the Author — Hire Freelance Programmer Aldian Fazrihady

Aldian Fazrihady is a Top-Rated Senior Freelance Programmer, Freelance Full Stack Developer, and AI Application Engineer with 15+ years of production software engineering experience and Google Cloud Professional Cloud Architect & Data Engineer certifications. He specializes in building custom LLM & autonomous AI agents, RAG pipelines, Next.js/React PWAs, Python (Django/FastAPI), Go microservices, and serverless cloud infrastructure on Google Cloud Run and AWS.

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