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langgraph-human-in-the-loop

Pause LangGraph execution with interrupt and resume via Command(resume=...).

Updated Aug 27, 2026
Search Tags:#workflow#resume#command#langgraph#human-in-the-loop#interrupt#checkpointer
One-click install
npx skills add https://github.com/Hanseooo/hanseo-opencode-workflows --skill langgraph-human-in-the-loop-hanseooo
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: langgraph-human-in-the-loop
Source: https://github.com/Hanseooo/hanseo-opencode-workflows/tree/main/skills/langgraph-human-in-the-loop
Command: npx skills add https://github.com/Hanseooo/hanseo-opencode-workflows --skill langgraph-human-in-the-loop-hanseooo

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

LangGraph's human-in-the-loop patterns let you pause graph execution, surface data to users, and resume with their input.

Core Features & Use Cases

  • interrupt(value) — pauses execution, surfaces a value to the caller
  • Command(resume=value) — resumes execution, providing the value back to interrupt()
  • Checkpointer — required to save state while paused
  • Thread ID — required to identify which paused execution to resume
  • Use Case: spend to handle approval workflows, error handling, and validation loops within complex graphs

Quick Start

Apply this skill to implement human-in-the-loop checks by pausing with interrupt and resuming with Command(resume=...).

Frequently Asked Questions about langgraph-human-in-the-loop

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I pause a LangGraph workflow for human approval?▼

Pause LangGraph workflows for human approval by calling interrupt(value) to halt execution and surface data to the caller. You must configure a checkpointer to save state and manage a thread_id to identify the paused execution for later resumption.

What is the best way to resume an interrupted LangGraph execution?▼

Resume an interrupted LangGraph execution by invoking Command(resume=value). This passes JSON-serializable user input back to the original interrupt() call, allowing the workflow to continue from its paused state using the same thread_id.

Do I need a checkpointer to use human-in-the-loop in LangGraph?▼

Yes, a checkpointer is required for human-in-the-loop in LangGraph. It saves the graph state while execution is paused during an interrupt, ensuring the workflow can be accurately restored and resumed later.

Can I use interrupt and Command for error handling in LangGraph?▼

Yes, you can use interrupt and Command for error handling in LangGraph. Pausing execution allows you to surface errors to users for validation and stepwise approval before resuming the graph with corrected JSON-serializable inputs.

Why does my LangGraph interrupt require JSON-serializable payloads?▼

LangGraph interrupts require JSON-serializable payloads because the checkpointer must save and restore the paused state. Non-serializable data cannot be persisted across the interrupt and Command resume cycle.

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