langgraph-human-in-the-loop
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.
npx skills add majiayu000/claude-skill-registry --skill langgraph-human-in-the-loop-harmeet10000-skills --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
<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> --- ## Requirements Three things are required for interrupts to work: 1. **Checkpointer** — compile with `checkpointer=InMemorySaver()` (dev) or `PostgresSaver` (prod) 2. **Thread ID** — pass `{"configurable": {"thread_id": "..."}}` to every `invoke`/`stream` call 3. **JSON-serializable payload** — the value passed to `interrupt()` must be JSON-serializable --- ## Basic Interrupt + Resume `interrupt(value)` pauses the graph. The value surfaces in the result under `__interrupt__`. `Command(resume=value)` resumes — the resume value becomes the return value of `interrupt()`. **Critical**: when the graph resumes, the node restarts from the **beginning** — all code before `interrupt()` re-runs. <ex-basic-interrupt-resume> <python> Pause execution for h
- Requirements
- Basic Interrupt + Resume
- Approval Workflow
- Validation Loop
- Multiple Interrupts
- Side Effects Before Interrupt Must Be Idempotent
- Subgraph re-execution on resume
- Command(resume) Warning
- Fixes
- What You Should NOT Do
What does the langgraph-human-in-the-loop skill do?
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.
How do I install it?
Run `npx skills add majiayu000/claude-skill-registry --skill langgraph-human-in-the-loop-harmeet10000-skills --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From majiayu000/claude-skill-registry, a repository with 534 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.