The trace is the artifact
If you cannot replay how an agent reached an answer, you cannot debug it, evaluate it, or improve it.
Workflow
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Context engineering for agents
Why the window is a budget to manage, not a bucket to fill, and the strategies that follow from that.
Why we recommend it The clearest treatment of the shift from prompt engineering to context management. The write/select/compress/isolate framing is useful immediately, even if you disagree with the specifics.
LangChain Blog
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Building effective agents
Anthropic's taxonomy of agentic patterns, from prompt chaining to autonomous loops.
Why we recommend it Still the clearest map of the design space. It separates workflows from agents and gives each pattern a concrete failure mode, which most tooling marketing never does.
Anthropic Engineering