What an agent actually is
The loop, the state, the tools. Where the magic is and where it is not.
First to openFrom a single tool call to a system that plans, acts, checks its own work and knows when to stop. Built the way production teams build them.
CourseComing soonIntermediateWriting now
The loop, the state, the tools. Where the magic is and where it is not.
First to openSchemas, validation, and what to do when the model returns almost-valid JSON.
PlannedPlan-then-act, reflection, budgets, and stop conditions that hold.
PlannedWorking memory, episodic memory, and when a database beats a prompt.
PlannedRouters, specialists and supervisors. When two agents are worse than one.
PlannedTask suites, traces, guardrails, and the incident you will have anyway.
PlannedFastAPI service, queues, observability, and the cost line.
PlannedOne email from the letter when it goes live. Unsubscribe any time.
The announcement comes through the letter: one email when part 1 goes live, free like every first part. Unsubscribe any time from the email or your account.