INVOKE THIS SKILL when implementing human-in-the-loop patterns, pausing for approval, or handling errors in LangGraph. Covers interrupt(), Command(resume=...), approval/validation workflows, and the 4-tier error handling strategy.
Install
npx skills add langchain-ai/langchain-skills --skill langgraph-human-in-the-loopnpx skills add langchain-ai/langchain-skills --skill langgraph-human-in-the-loop -a claude-code -gnpx skills add langchain-ai/langchain-skills --skill langgraph-human-in-the-loop -a codex -ggemini skills install https://github.com/langchain-ai/langchain-skills.git --path config/skills/langgraph-human-in-the-loopgh skill install langchain-ai/langchain-skills langgraph-human-in-the-loopgit clone --depth 1 https://github.com/langchain-ai/langchain-skills /tmp/langchain-ai__langchain-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/langchain-ai__langchain-skills/config/skills/langgraph-human-in-the-loop ~/.claude/skills/langgraph-human-in-the-loop # Claude Code
cp -R /tmp/langchain-ai__langchain-skills/config/skills/langgraph-human-in-the-loop ~/.agents/skills/langgraph-human-in-the-loop # Codex, Cursor, Gemini CLI, Copilot, OpenCode