skills.rest
agnivon
agnivonCOMMUNITY
Explore all skills by this author →
Website𝕏@agnivonGitHub

langgraph-human-in-the-loop

Implements human-in-the-loop approval and validation workflows in LangGraph using interrupt and Command resume.

Updated Jun 7, 2026
Search Tags:#agent#resume#langgraph#human-in-the-loop#approval workflow#interrupt#checkpointer
One-click install
npx skills add https://github.com/agnivon/viral_thread_generator --skill langgraph-human-in-the-loop-agnivon
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: langgraph-human-in-the-loop
Source: https://github.com/agnivon/viral_thread_generator/tree/main/.agents/skills/langgraph-human-in-the-loop
Command: npx skills add https://github.com/agnivon/viral_thread_generator --skill langgraph-human-in-the-loop-agnivon

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires @langchain/langgraph, langgraph.

What problem does it solve? Building LangGraph agents that pause for human approval, review, or input is error-prone: missing checkpointers, wrong resume patterns, and non-idempotent side effects cause stuck graphs or duplicate records. This Skill provides the correct patterns for pausing and resuming graph execution safely. ## Core Features & Use Cases - Interrupt and Resume: Pause graph execution with interrupt(value) and resume with Command(resume=value) using a checkpointer and thread ID. - Approval and Validation Workflows: Route based on human decisions, and loop with re-prompts until human input passes validation. - Idempotency Guidance: Prevent duplicate side effects when nodes re-execute on resume, including subgraph re-execution behavior. - Use Case: You are building an email agent that drafts replies. Use this Skill to interrupt before sending, surface the draft for human review, and route to send or discard based on the reviewer's decision. ## Quick Start Add a human approval step to my LangGraph agent that pauses before sending the email draft and resumes based on my decision.

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 agent for human approval?▼

Call interrupt(value) inside a node to pause execution and surface a payload to the caller. Resume by invoking the graph with Command(resume=value), and the resume value becomes the return value of interrupt().

How to resume a LangGraph interrupt in TypeScript?▼

Resume a LangGraph interrupt by calling graph.invoke with new Command({ resume: value }) and the same thread_id config. Passing a plain object instead restarts the graph rather than resuming it.

Why does my LangGraph interrupt fail or the graph appear stuck?▼

Interrupts fail without a checkpointer compiled into the graph, and resuming without the same thread_id starts a new thread. Passing Command(update=...) as invoke input also makes the graph appear stuck; only Command(resume=...) is valid input.

Does LangGraph interrupt require a checkpointer?▼

Yes, interrupts require a checkpointer such as InMemorySaver for development or PostgresSaver for production, plus a thread_id in the config. The checkpointer saves state while paused so execution can resume later.

Why do side effects duplicate when resuming a LangGraph interrupt?▼

When a graph resumes, the node restarts from the beginning, so all code before interrupt() re-runs. Use upserts or check-before-create patterns, or move side effects after the interrupt call to avoid duplicates.

How do I resume multiple parallel interrupts in LangGraph?▼

Resume multiple parallel interrupts in one invocation by passing Command(resume=...) with a map from each interrupt ID to its resume value. The pending interrupts and their IDs are available in the result under __interrupt__.

Related Skills

Explore More Software Engineering Skills→
amiteamite

langgraph

Orchestrate durable, stateful agent workflows with LangGraph nodes and edges.

Community
Advanced
latestaiagentslatestaiagents
5

human-in-loop-agents

Build AI agents that pause for human approval before critical actions.

Official
Advanced
dhar174dhar174
1

langgraph-error-handling

Implement LangGraph error handling with RetryPolicy, Command routing, and interrupt().

Community
Advanced
robit-manrobit-man

iteration-control

Track retry attempts and escalate failed validation loops to users.

Community
Advanced