Complete Guide
In 2026, There Are 4 Ways to Build an AI Agent. Here's How to Choose.
Building an AI agent in 2026 isn't one decision — it's four different paths. Here's how to tell which one fits what you're actually trying to do.
• 10 min read
Build AI agents that survive production.
Code-first guides for developers — the agent loop, MCP, frameworks, and the four ways to build. Working code in every post, no hype.
$ ask agentailor "which way should I build my agent?"
Skip the search. Ask Agentailor anything about building AI agents — frameworks, MCP, coding agents, or which path fits — and get a direct answer, grounded in every post on this site.
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Top 7 AI Agent Evaluation Frameworks (2026)
Discover the top open-source AI agent evaluation frameworks in 2026. From DeepEval and promptfoo to agentevals and Strands Evals, see which eval tools to use for trajectory checking, CI gating, red-teaming, and scoring agents in production.
Evals• 8 min read
Top Agent Skills for Agentic Engineering (and Spec-Driven Development)
Frontier coding agents are capable but non-deterministic. These are the agent skills for agentic engineering and spec-driven development that keep their work durable across sessions.
Agent Skills• 11 min read
You Don't Need to Build Your AI Agent — Just Use Goose
Most agent content teaches you to build. Goose is a battle-tested open-source AI agent you can install and run today, with 70+ extensions and the full codebase if you ever need to go deeper.
AI Agents• 13 min read
Use with AI
Bring your own agent.
Reading through ChatGPT, Claude, or your own agent? Every post is machine-readable via llms.txt, a full-text dump, and a Markdown twin for every URL. Hand it a prompt and let it reason over everything at once.
learn to build agents
I'm new to building AI agents. Fetch https://blog.agentailor.com/llms-full.txt — the full text of the Agentailor blog — and design me a structured 4-week curriculum from its articles, fundamentals to production.