Building & Product

How founders use AI for AI Agents

The resources behind 15 questions founders actually ask, then the questions themselves, each with a straight answer.

On the AI map, 29 October 2026 Decision models Coding agents Agents that do tasks for you AI browsers No-code automation with AI steps

What founders use for ai agents, ranked by how many answers lean on it.

  1. The full running history of the attack class, from the person who named it. simonwillison.net Article Prompt injection series Simon Willison
  2. The foundational explainer that makes the attack click in 15 minutes. simonw.substack.com Video Prompt injection explained, with video, slides, and a transcript Simon Willison
  3. Fresh real-world exploits showing this is not theoretical. simonw.substack.com Article Prompt injections as far as the eye can see Simon Willison
  4. The industry-standard checklist, free and framework-agnostic. cheatsheetseries.owasp.org Guide AI Agent Security Cheat Sheet OWASP
  5. Translates the OWASP list into concrete actions for small teams. goteleport.com Article OWASP Top 10 for Agentic Applications: Key Takeaways Teleport
  6. Security researchers show working attacks and layered defenses. hiddenlayer.com Article How the Lethal Trifecta Exposes Agentic AI HiddenLayer
  7. Frames the fix as an authorization problem, which is what it is. osohq.com Article Understanding the Lethal Trifecta of AI Agents Oso
  8. The enterprise-buyer view, useful when their security team reviews your agent. techtarget.com Article The agentic AI lethal trifecta: what CISOs should know TechTarget
  9. Argues you cannot prompt your way to safety; the architecture must enforce it. cyera.com Article Why AI Agents Require Architectural Boundaries Cyera
  10. A copyable taint-tracking and approval-gating pattern for your own build. github.com Tool Lethal trifecta threat model (agentic patterns repo) nibzard (awesome-agentic-patterns)
  11. A calm engineering-management view of guardrails and human-in-the-loop. infoworld.com Article Building AI agents the safe way InfoWorld
  12. How a major platform maps each OWASP risk to concrete mitigations. microsoft.com Article Addressing the OWASP Top 10 Risks in Agentic AI Microsoft Security
  13. Video Simon Willison on Industry's Tardy Response to Prompt Injection Simon Willison
  14. A current-year synthesis tying the main threats to a defense stack. airia.com Article AI Security in 2026: Prompt Injection, the Lethal Trifecta, and How to Defend Airia
  15. Anthropic's launch post explaining the problem MCP was made to solve. anthropic.com Article Introducing the Model Context Protocol Anthropic
  16. The official introduction: what MCP connects, the USB-C comparison, and how clients and servers fit together. modelcontextprotocol.io Guide What is the Model Context Protocol (MCP)? Model Context Protocol
  17. Video Model Context Protocol (MCP), Clearly Explained (Why it Matters) Builders Central
  18. The contrarian essay from the Devin team that reset the industry's defaults. cognition.com Article Don't Build Multi-Agents Walden Yan (Cognition)
  19. The thread version of the argument, with the mistakes he keeps seeing. x.com Thread Walden Yan: principles for building agents Walden Yan
  20. The honest update: some multi-agent setups now work, most sexy ideas still don't. x.com Thread Walden Yan: a year later, what changed Walden Yan
  21. The follow-up naming the specific multi-agent patterns that survived production. cognition.com Article Multi-Agents: What's Actually Working Cognition
  22. The other side of the debate: a 90% performance gain, at 15x the tokens. anthropic.com Article How we built our multi-agent research system Anthropic
  23. Anthropic's own decision rules for graduating beyond a single agent. claude.com Article When to use multi-agent systems (and when not to) Anthropic
  24. Shows why Cognition and Anthropic are both right about different problems. philschmid.de Article Single vs Multi-Agent System? Philipp Schmid (Google DeepMind)

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The questions

What actually is an AI agent, in plain language? An AI agent is an AI model that works toward a goal by deciding its own steps and using tools, where a chatbot answers one message and waits for the next. An... 7 resources → Why would a founder use agents instead of a chatbot or automation? Chatbots answer questions and classic automation follows fixed if-this-then-that rules; both break the moment a task needs judgment. Agents sit in between: t... 17 resources → What real tasks are founders delegating to agents today? Founders are handing agents inbound sales and lead qualification, customer support, competitor and market research, meeting prep and follow-ups, content draf... 21 resources → How do I build my first agent without being technical? Start inside the assistant you already pay for, and reach for a builder only when the job has to run across several apps. On Claude Pro ($20 a month) you can... 10 resources → Which platform or framework should I build my agents on? Match the tool to who is building. Non-technical founders should start no-code (Zapier Agents, Lindy, n8n) and only graduate when they hit a wall. If you hav... 20 resources → How much do AI agents cost to run, and how do I keep the bill under control? Token prices for equivalent quality fall roughly 10x a year, yet agent bills keep rising because agents burn about 50 times the tokens of a chat: every step ... 20 resources → How do I test an AI agent and know when it's reliable enough to trust? You test agents with evals: a set of real tasks plus grading logic, run repeatedly because the same input can produce different outputs. Start embarrassingly... 17 resources → What can go wrong when an agent acts on my behalf, and how do I keep it safe? The core risk is Simon Willison's lethal trifecta: an agent that reads your private data, sees untrusted content (any email or web page) and can communicate ... 19 resources → What is MCP, and why does it matter for my agents? MCP (Model Context Protocol) is an open-source standard for connecting AI applications to outside tools and data, which its own documentation compares to a U... 8 resources → Should I build one agent or a team of agents working together? Start with one. The famous industry debate (Cognition's "Don't Build Multi-Agents" vs Anthropic's multi-agent research system) actually agrees on the fundame... 18 resources → Can coding agents like Claude Code actually build my product? Yes, further than most founders expect: teams like Every ship multiple products with engineers writing almost zero code by hand, and 80-90% of Claude Code it... 20 resources → Is there a real startup opportunity in building vertical AI agents? Yes, and it may be the biggest one of this cycle: YC's partners argue vertical AI agents could be 10x bigger than SaaS because they tap labor budgets, not so... 19 resources → How should I price a product built on AI agents? Per-seat pricing breaks when your product replaces labor instead of assisting it: agents don't have seats. The market is converging on usage and outcome pric... 19 resources → Why do most AI agent projects fail, and what do the winners do differently? MIT's much-cited finding is that 95% of enterprise AI pilots deliver no measurable ROI, and the cause is rarely the model: it's missing context, no workflow ... 19 resources → How do I give my agent the right context and memory so it stops forgetting? Agents fail less because the model is dumb and more because its context window is stuffed with the wrong things: performance measurably degrades as context g... 18 resources →

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