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Every roundup ranks a different framework first, and you just want to know which one fits the agent you're actually building.
What you'll have at the end
A short written decision naming the framework, why you rejected the others, and a working hello-world agent in it
You need
A specific agent you're actually about to build, not a hypothetical one, so you have real requirements to weigh against the three shapes below.
Not covered
This doesn't cover single-vendor agent SDKs tied to one model provider, or AutoGen, the fourth name that used to complete this shortlist before Microsoft folded it into a different product: real alternatives, but a separate comparison.
Leans on
Write a tool-using agent loop that knows when to stop
picked the plain loop instead of a framework? this is the actual while-loop shape to build.
Should your agent ask before it deletes, sends, or pays?
for deciding whether the agent should even pause and ask a human before you wire the framework that makes that pause durable.
Draft a handoff contract between two agents
once the pick is a framework that supports several roles, this writes the actual contract between them.
Checked 15 Aug 2026
Part of the AI Agents cookbook