# Chapter 19: Lucy leaves the shop for a day

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> **Original source and updates:** [profrodai/sovereign-agent](https://github.com/profrodai/sovereign-agent).

**Available draft · two ninety-minute units · nineteen-chapter edition**

Attempt the student work before consulting the solutions. Untouched exercises intentionally report NEEDS_WORK.

| Session | Notebook | Matching text | Purpose |
|---|---|---|---|
| A · 90 minutes | [A: integrated day acceptance](profrod-sovereign-agent-ch19-a-integrated-day-acceptance-exercise.ipynb) | [Markdown](profrod-sovereign-agent-ch19-a-integrated-day-acceptance-exercise.md) | Construct, connect and explain |
| B · 90 minutes | [B: acceptance repair transfer](profrod-sovereign-agent-ch19-b-acceptance-repair-transfer-exercise.ipynb) | [Markdown](profrod-sovereign-agent-ch19-b-acceptance-repair-transfer-exercise.md) | Diagnose, repair and transfer |

Each notebook includes its own setup, first-principles introductions and supplied teaching runtime. Use a Python 3.14 Jupyter kernel and Pydantic 2. No repository checkout, previous notebook kernel or live account is needed. Unit B can use an explicitly selected successful Unit A handoff; an invalid selected file refuses rather than substituting an answer.

Ninety minutes is the planned work allowance per unit, excluding installation. Actual completion time and understanding require classroom observation.

[Setup](../profrod-sovereign-agent-exercises-setup.md) · [Back to this asset](../profrod-sovereign-agent-exercises-start-here.md)

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