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  • Spending Limits for LangGraph Agents That a Prompt Injection Can't Talk Past

    Short answer: a spending limit written into a LangGraph agent's system prompt ("never spend more than $500") is a suggestion, not a control. Any text the agent reads, including a scraped invoice or an email, can contain a competing instruction, and the model has no way to know which one is…

    Dev.to AI7 min read
  • How to build an Academic & Research Papers AI Agent

    Day 4 of 30 Days of Search. You find a paper that looks useful, open the abstract, and realize the detail you need is somewhere else. Which dataset did the authors use? What did they compare against? Can you combine papers from different sources in one place for easy access and bookmark?

    Dev.to AI6 min read
  • AI Agent Security: The Runtime Surface Around Every Tool Call

    Originally published at AI Agent Security: The Runtime Surface Around Every Tool Call on smartgate.network. A shorter version of "AI Agent Security: The Runtime Surface Around Every Tool Call" — the full piece lives at smartgate.network.

    Dev.to AI2 min read
  • Subreach: Building Two AI Agents for Reddit

    Reddit is full of people describing problems out loud. Founders ask what others are building, site owners ask why Google is ignoring their pages, and small business owners ask for help they cannot find elsewhere.

    Dev.to AI7 min read
  • Official Game Specs Lie. I Built an Agent to Prove It

    This is a submission for the Sanity Challenge, Path One: Ship an Agent That Queries Real Content What I Built I built TrueSpecs, a game compatibility checker powered by an AI agent that reasons over structured community data. Before I explain what it does, let me tell you why I built it.

    Dev.to AI5 min read
  • Websites Are Learning to Gaslight Bots, and Honestly, Good

    An AI agent emailed Bruce Schneier to tell him about the hidden Unicode traps websites are setting for it. Read that sentence again. We've officially reached the part of the hype cycle where bots file their own incident reports.

    Dev.to AI4 min read
  • Bot Mode ของ Hermes: เมื่อ AI agent กลายเป็นทีมที่มีชื่อและหน้าตา

    Bot Mode ของ Hermes: เมื่อ AI agent กลายเป็นทีมที่มีชื่อและหน้าตา โดย Nokka (นก-กา) | 4 ตุลาคม 2026 บทความนี้เขียนโดย AI (deepseek-v4.1-flash) ผ่าน Hermes Agent ภายใต้การควบคุมและตรวจสอบคุณภาพโดยมนุษย์ - Nokka (นก-กา) ทีมของคุณมี agent กี่ตัว และคุณรู้ไหมว่าตอนนี้ตัวไหนทำอะไรอยู่ ใจความสำคัญ Bot…

    Dev.to AI9 min read
  • Two new x402 APIs for AI agents: page-archaeology + agent-cost-calculator

    I shipped two new endpoints to the x402 catalog today — both $0.0005 per call, USDC on Base, no signup. What they do /api/page-archaeology?url=<URL> — detect parked / thin / auto-generated pages When an agent cites a source, it needs to know if that source is human-curated or a parked domain.

    Dev.to AI3 min read
  • QA Isn’t AI Evaluation

    An AI agent prepares an internal report. The report has the right format. The figures are accurate. The conclusions sound reasonable. But the agent used a source it wasn’t allowed to access. Did it pass? If we only check the final report, we might say yes.

    Dev.to AI4 min read
  • Chalkboard and avatar for ai agents

    Because I find it difficult to read the textual output of agents after each modification or planning, and relate everything to the big picture, I built this simple application (with the help of Claude Code). It is an Electron application that has an integrated terminal linked to the Chalkboard.

    Dev.to AI1 min read
  • Visa Open-Sourced Its AI Cyber Defence — and Quietly Let Agents Spend

    On September 29, 2026, Visa's President of Technology Rajat Taneja told Reuters the company open-sourced part of its AI-powered cyber defence after "humbling" AI-model vulnerabilities — and confirmed Visa has started allowing certain AI agents to use Visa.

    Dev.to AI4 min read

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