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 research evidence that performance degrades with input length. arxiv.org Article Diagnosing and Mitigating Context Rot in Long-horizon Search arXiv researchers
  2. Reverse-engineers how Claude's own products manage context. 01.me Article Claude's Context Engineering Secrets: Best Practices from Anthropic Bojie Li
  3. How a code-intelligence company feeds agents exactly the right slice of a codebase. sourcegraph.com Guide Context Engineering: A Practical Guide for AI Agents Sourcegraph
  4. Connects context engineering to harness design in three principles. hugobowne.substack.com Article AI Agent Harness, 3 Principles for Context Engineering, and the Bitter Lesson Revisited Hugo Bowne-Anderson
  5. Notes from the two leading teams comparing approaches live. medium.com Article Inside the LangChain x Manus Webinar on Context Engineering Duarte Caldas Cardoso
  6. Where memory and context management are heading next. eu.36kr.com Article Harrison Chase: 2026 ushers in long-horizon agents 36Kr (Harrison Chase interview)
  7. The feature that cuts up to 90% off repeated context, table stakes for agents. claude.com Article Prompt caching with Claude Anthropic
  8. The expanded book with revenue benchmarks from Harvey, EvenUp and peers. web.archive.org Guide Building Vertical AI (full book, PDF) Bessemer Venture Partners
  9. A startup-incubator's sober read on what agents can and cannot do yet. aihouse.vc Article The State of AI Agents in 2025: Balancing Optimism with Reality AI2 Incubator
  10. A quick digest of the Manus lessons if you skip the original. web.archive.org Article Context Engineering for AI Agents: Key Lessons from Manus Context.Space
  11. Anthropic's data that Claude use has moved from conversations to long-running agentic tasks, and what people produce with them. anthropic.com Article Anthropic Economic Index report: Cadences Anthropic
  12. How to hand Claude a report or deck from any conversation and schedule it to run every week, with no builder at all. claude.com Article Claude Cowork and chat are now one Claude Anthropic
  13. OpenAI's docs for the managed route: it runs sessions, orchestration, context compaction and a sandbox while you supply the tools. developers.openai.com Guide Agents API overview OpenAI
  14. OpenAI's endpoint for probability, choice and score answers on GPT-6 Luna, about 10x faster than the Responses API, for routing... developers.openai.com Guide Decisions API guide OpenAI
  15. A clear, sceptical explainer of decision models: why answering with a choice instead of text is fast and cheap, and where... seangoedecke.com Article Jev means structured output is interesting again Sean Goedecke
  16. Anthropic on letting Claude act in the browser without approving each step, with a safety classifier checking every action. claude.com Article Claude in Chrome is generally available Anthropic
  17. How an always-on agent is fenced in: its own sandboxed computer, read-only background research, auto-review of actions and... openai.com Article How we build safety, security, and privacy into dots OpenAI
  18. Survey finding that 24% of US AI users use an agent regularly and 32% have let AI act for them without final approval, which is... menlovc.com Article 2026: The State of Consumer AI Menlo Ventures
  19. The current MCP spec release from its maintainers: a stateless core and stronger authorisation, for whoever on your team runs... blog.modelcontextprotocol.io Article The 2026-07-28 Specification MCP project
  20. Explains why the support agent priced per outcome is now called Fin and sold inside Salesforce. salesforce.com Article Salesforce Completes Acquisition of Fin Salesforce

The questions

What actually is an AI agent, in plain language? An AI agent is software that uses an AI model as its brain to pursue a goal: it plans the steps, uses tools (your email, browser, spreadsheets, code, APIs), ... 19 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 with the assistant you already pay for: Claude and Tasks in Gemini run a plain-English job on a schedule. To connect several apps, use Zapier Agents or... 20 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 standard, started by Anthropic in late 2024 and since adopted by OpenAI and Google, that works like a USB-C port for ... 20 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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