AI Agent Frameworks / Quiz
StateGraph 101: Nodes, Edges, State
add_node, add_edge, compile. LangGraph turns an agent into an explicit state machine, which is the best thing to happen to agent testing in years.
- Difficulty
- Easy
- Format
- Quiz
- Points
- 100
- Estimate
- 9 min
// MISSION BRIEF
Your Mission
LangGraph models an agent as a graph: a typed state, nodes that transform it, edges that route it. Explicit structure means explicit test surfaces. This quiz covers the core build API and what each piece means for a tester.
Scoring: equal weight per question.
// FIRST CONTACT
Battle teaser
The canonical LangGraph build sequence is:
- ASubclass BaseGraph and override run()
- BWrite YAML and load it with graph.from_yaml()
- Cbuilder = StateGraph(State); builder.add_node("agent", agent_fn); builder.add_edge(START, "agent"); builder.add_edge("agent", END); graph = builder.compile()
- Dgraph = Graph.auto(llm) and everything is inferred
Answers, scoring, hints, and the full battle stay sealed.
// SKILL TAGS
langgraphstategraphstateai-agents