AI Engineering Playbook
Rapid Fire

Rapid Fire: Agents

Question → 3-line answer, flashcard style.

Prerequisites

Agents — work through the full section first. This deck strengthens recall of material you already understand; it will quietly fail you on material you don't.

How to use this deck

Cover the answer. Read only the question. Say your answer out loud, in full sentences, as if explaining it to someone who hasn't read the page. Then uncover and compare — not "did I know it?" but did I say it as cleanly as that?

Recognising an answer feels almost identical to being able to produce one, and the two come apart the moment you have to actually explain something. Anything you couldn't say fluently is a signal to reread its full page, one click away below.

Fundamentals

Fundamentals5 cards

Card 1 of 5

What is an agent, versus a workflow?

Reliability

Reliability4 cards

Card 1 of 4

How should tool errors be handled?

The harness

The harness13 cards

Card 1 of 13

What is an agent harness?

Frameworks and memory

Frameworks and memory4 cards

Card 1 of 4

What is LangGraph in one breath?

Multi-agent

Multi-agent3 cards

Card 1 of 3

Supervisor vs handoff patterns?

Judgment

Judgment2 cards

Card 1 of 2

When should you NOT build an agent?

Full treatment: Agents — the mechanisms behind every answer above.

Rapid Fire: MCP

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