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langgraph-human-in-the-loop

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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.

config/skills/langgraph-human-in-the-loop/SKILL.md

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Nov 10, 2026
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<overview>
LangGraph's human-in-the-loop patterns let you pause graph execution, surface data to users, and resume with their input:

- **`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
</overview>

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## Requirements

Three things are required for interrupts to work:
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