LangGraph State Management Cheatsheet
One-Page Reference
State schemas, checkpoint patterns, human-in-the-loop gates, and multi-agent coordination. Everything you need on a single page when building LangGraph applications.
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LangGraph quick reference
Get our one-page cheatsheet covering state schemas, checkpoint backends, recursion limits, and HITL patterns before your next LangGraph deployment.
What's covered
Inside the cheatsheet
01
State Schemas
- TypedDict state definition
- Reducer functions (add, replace, append)
- Shared state vs private state
- Nested state objects
02
Checkpointing
- MemorySaver (dev)
- SqliteSaver / PostgresSaver (prod)
- Checkpoint filtering
- State replay and time travel
03
Human-in-the-Loop
- interrupt_before / interrupt_after
- Approval gates
- State editing before resume
- Rejection handling
04
Multi-Agent Patterns
- Supervisor routing
- Handoff protocol
- Shared state coordination
- Parallel execution with gather
Next Step
Turn this into a running system
Use this resource to sharpen the engineering decision, then move into the capability path that implements the system with production discipline.
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