Specs, guides & references
12-Factor Agents
newEngineering principles for reliable production agent systems.
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AGENTS.mdOpen format for a project file that guides coding agents.
Model Context ProtocolOpen standard for connecting agents to tools and data.
llms.txtProposed /llms.txt file so sites expose content for LLMs.
Building effective agentsAnthropic's practical guide to agent architectures and workflows.
Loop EngineeringPatterns, starters, and CLIs for designing loops that drive coding agents.
Harness engineeringOpenAI on building the tooling and workflows around coding agents (not just the models).