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Save workflow state, pause for a human yes or no, then load and continue — so a large refund can wait until tomorrow without losing the job.
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Persistence and Human-in-the-Loop
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Persistence and Human-in-the-Loop
Contract
- Put your API key in the practice file (fine for local learning)
- Create an authenticated client
- Run until wait_human; save state (+ next step) to a JSON file
- Simulate a human yes; load state and continue to refund
- Print both runs and the final reply
persist_demo.py
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Example console
Sample run — exact text can vary
=== Run A: work until human needed === node: lookup (filled from order file) node: decide → size=LARGE node: wait_human Order 4412 needs human approval ($900) before refund. Saved checkpoint → refund_checkpoint.json Program stops here (like end of Monday). === Run B: human decided; resume === Loaded checkpoint. next_node=after_approval Human says: yes node: refund Final state: order_id: 4412 amount_usd: 900 item: laptop stand size: LARGE approved: yes status: done reply: Refunded $900 for order 4412. Final answer: Refunded $900 for order 4412.