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Finding the Bugs I Built an AI Agent to Prevent: Building Deterministic Guardrails with LangGraph & Python

`` A real debugging log: fabrication bugs, deployment gaps, and false test passes found and closed across 6 rounds of adversarial testing. System pr…

aipythonlanggraphrag
Dev.to Oct 17, 2026, 18:28 UTC
EN

Don’t Trust the Answer, Trust the Log: Lessons from Building an AI Expense Auditor

canonical_url: https://valentiuskryptix.com/3-surprising-failures-from-testing-my-ai-auditing-agent/ A chatbot answers questions. An agent is differ…

aipythonagentslanggraph
Dev.to Oct 17, 2026, 12:24 UTC
EN

Sub-100ms Cargo & Food Safety Triage: Eliminating 72% of Routing LLM Calls in National Supply Chains

Sub-100ms Cargo & Food Safety Triage: Eliminating 72% of Routing LLM Calls in National Supply Chains Part 3 of the "Jev-First Routing for LangGr…

aiagentssupplychainlogisticslanggraph
Dev.to Oct 16, 2026, 22:26 UTC
EN

Manufacturing AI at Scale: Slashing Agent Latency and Cutting 74% of LLM Routing Calls in Industrial Safety Dispatch

Manufacturing AI at Scale: Slashing Agent Latency and Cutting 74% of LLM Routing Calls in Industrial Safety Dispatch Part 2 of the "Jev-First Routin…

aiagentsmanufacturinglanggrapharchitecture
Dev.to Oct 16, 2026, 22:25 UTC
EN

Python 3.15 for AI agent builders: 5 changes worth knowing

Before you start: LangGraph doesn't install on Python 3.15 yet. One of its dependencies (ormsgpack) has no build for 3.15. Keep production agents on…

aiprogrammingpythonlanggraph
Dev.to Oct 15, 2026, 07:23 UTC
EN

Building AI Agents with LangGraph: From Fundamentals to Production

Building AI Agents with LangGraph: From Fundamentals to Production A comprehensive guide to building reliable, stateful AI agents using LangGraph —…

langgraphaiagentslangchaintutorial
Dev.to Oct 12, 2026, 17:25 UTC
EN

What should an AI agent do when it hits its budget?

Give an agent a budget and sooner or later it reaches the edge of it. A research agent has spent 4.20 of its 5.00 USD cap, and the next step (one mo…

aiagentslanggraphpayments
Dev.to Oct 10, 2026, 18:26 UTC
EN

How to Stop an AI Agent Infinite Loop

A simple planning request triggered 105 calls to the same goal tool. The system did not crash immediately. It kept spending tokens until the turn li…

aiagentslanggraphsre
Dev.to Sep 26, 2026, 16:24 UTC
EN

I changed a tool's schema four ways and watched three agent frameworks break differently — 36 runs measured

If you run agents with tools, this day always comes: "I need to change this tool's arguments — will the agent survive?" Tool schema changes are a da…

aiagentsllmlanggraphpython
Dev.to Sep 25, 2026, 18:23 UTC
EN

Building an Agentic Fraud Investigation System with TigerGraph, LangGraph & MCP

TL;DR : We built a 9-node LangGraph agent that investigates fraud cases end-to-end. It uses TigerGraph Community Edition as the knowledge graph subs…

tigergraphaifrauddetectionlanggraph
Dev.to Sep 24, 2026, 14:56 UTC
EN

How I Built (and Broke) a Production Multi-Agent AI System

How I Built (and Broke) a Production Multi-Agent AI System Most agent demos work great — right up until you run them past the happy path. This is th…

ailanggraphpythonwebdev
Dev.to Sep 21, 2026, 10:02 UTC
EN

Multi-Agent Orchestration 2026: LangGraph, CrewAI, and AutoGen Compared

The market for AI agents reached a new maturity phase in 2026: Instead of individual, monolithic agents, companies are increasingly relying on multi…

ailanggraphcrewaiautogen
Dev.to Sep 20, 2026, 12:00 UTC
EN

How to Move an n8n Prototype into a LangGraph Production Agent

You already have an n8n workflow that functions. It receives a request, calls APIs, uses an LLM, makes decisions, updates a database, and returns a…

n8nlanggraphprototypeagents
Dev.to Sep 16, 2026, 06:10 UTC
EN

From Heartbeat to Hospital: Building a Closed-Loop Health Agent with LangGraph

We live in an era where our watches know more about our hearts than we do. But there’s a massive gap between receiving a "High Heart Rate" notificat…

aipythonlanggraphhealthtech
Dev.to Sep 2, 2026, 00:44 UTC
EN

FreshCtx 0.6.0: Stop AI agents from acting on stale data

AI agents do not need to hallucinate to make the wrong decision. They can read accurate information, reason correctly, and still take the wrong acti…

aipythonopensourcelanggraph
Dev.to Sep 1, 2026, 03:44 UTC
EN

The Most Important AI Agent Design Choice: Don’t Let the Model Be the Final Authority

AI agents are getting very good at doing things . They can search databases, call APIs, modify tickets, draft code, update records, trigger workflow…

aiwebdevlanggraphmultiagent
Dev.to Aug 29, 2026, 09:09 UTC
EN

Engineering 24/7 Autonomous Agent Daemons: LangGraph Cyclic StateGraphs, NVIDIA NIM, DeepSeek-R1 & Hermes-3

Executive Summary: Linear prompt chains break down under multi-step autonomous workloads. Building true 24/7 background agent daemons requires cycli…

aipythonlanggraphllm
Dev.to Aug 28, 2026, 19:09 UTC
EN

Loops vs Graphs: Why Agent Architecture Needs Both (and a Compiler Between Them)

The False Dichotomy The agent ecosystem is split into two camps: Camp Loops (Boris Cherny, OpenAI Agents SDK, LangGraph): > "Agents are loops. Pl…

aiagentsarchitecturelanggraph
Dev.to Aug 26, 2026, 00:09 UTC
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grow-hack: An AI Pipeline That Turns Any GitHub Repo Into Professional Docs in Under a Minute

Every developer has been there: you clone a promising repository, and the README is either missing, three years stale, or says "docs coming soon." E…

aiflasklanggraphdocumentation
Dev.to Aug 22, 2026, 09:20 UTC
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I Built a Self-Healing AI Layer for Odoo — Here's What Actually Broke

Enterprise ERP platforms like Odoo get customized constantly — every business adds its own fields (x_studio_client_tax_id, x_vendor_code_v2, whateve…

ailanggraphpythonmachinelearning
Dev.to Aug 19, 2026, 05:20 UTC
EN

How to Connect a Foundry IQ Knowledge Base to LangGraph over MCP

A step-by-step guide to grounding a LangGraph agent in Microsoft Foundry IQ agentic retrieval — without rebuilding your RAG pipeline. Why this integ…

microsoftfoundrylanggraphmcp
Dev.to Aug 18, 2026, 08:43 UTC
RU

Deep Agents: open source-обвязка на LangGraph

Привет, на связи команда GigaChain! Мы занимаемся агентными системами и развиваем набор open source-решений для подключения агентов к GigaChat API.…

агентыharnessharness engineeringgigachatgigachainlanggraphlangchain
Habr Aug 17, 2026, 10:44 UTC
EN

Agent State, Memory & Checkpointing: Three Things That Sound Similar but Aren’t

Hi. While making my agents orchestrate, remember, resume or anything for that matter, I found myself thinking about how naturally we do some of thes…

aiagentslanggraphaws
Dev.to Aug 16, 2026, 20:02 UTC
EN

LangGraph API Failure

We've all been there - you've built an agentic AI system using LangGraph and MCP, and it's been humming along just fine, until one day, a third-part…

langgraphmcpagenticaipython
Dev.to Aug 16, 2026, 03:39 UTC
EN

Cascading Failures in Multi-Agent Systems

I still remember the day our support bot, powered by a LangGraph agent workflow, started behaving erratically. Customers would ask for help with the…

langgraphmcpagenticaipython
Dev.to Aug 14, 2026, 04:42 UTC
EN

Managed Agent Infrastructure: What Changes When the Runtime Is Handled For You

Managed agent frameworks address a specific infrastructure challenge: streams that don't timeout, memory that persists across sessions, and auth tha…

langgraphagentsllmpython
Dev.to Aug 13, 2026, 08:06 UTC
EN

Day 29/30: Deploying LangGraph + MCP

So you've finally gotten your LangGraph + MCP agent working on your local machine - it's responding to queries, adapting to new information, and gen…

langgraphmcpagenticaipython
Dev.to Aug 8, 2026, 04:05 UTC
EN

Qwen3 235B Tops the Agentic Benchmark - What That Test Actually Measures

Agentic benchmarks rank models differently than chat benchmarks do, and the gap between the two scores is now wide enough to matter for real deploym…

llmagentslanggraphqwen
Dev.to Aug 7, 2026, 00:12 UTC
EN

Day 24/30: MCP Primitives Explained

I recently spent a frustrating afternoon debugging a LangGraph-based agentic AI system that was supposed to book flights for users. The system would…

mcpagenticailanggraphpython
Dev.to Aug 3, 2026, 06:10 UTC
EN

LangChain Essentials — The Only Things You Need Before LangGraph

Note: This article was written in July 2026 using LangChain 0.3.x. APIs may change in future versions — check the LangChain docs if something doesn'…

langchainlanggraphpythonai
Dev.to Jul 31, 2026, 20:03 UTC

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