# Runnable reference checkpoints

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

**Updated:** 2026-09-09 · **Status:** DRAFT

Run from the complete repository root using the [frozen environment](profrod-sovereign-agent-textbook-conventions.md). These demonstrations accompany the manuscript. The [ownership guide](profrod-sovereign-agent-textbook-ownership.md) distinguishes learner-built definitions from supplied runtime behavior. New Chapters 4, 7 and 13 have construction briefs, not completed checkpoints.

| Chapter | Manuscript | Checkpoint |
| --- | --- | --- |
| 1 | [Make the first model call for Lucy](ch01/profrod-sovereign-agent-ch01-first-model-call-chapter.md) | [ch01.py](checkpoints/profrod_sovereign_agent_ch01_first_model_call_checkpoint.py) |
| 2 | [Give the agent reliable shop tools](ch02/profrod-sovereign-agent-ch02-pydantic-shop-tools-chapter.md) | [ch02.py](checkpoints/profrod_sovereign_agent_ch02_pydantic_shop_tools_checkpoint.py) |
| 3 | [Build the model and tool loop](ch03/profrod-sovereign-agent-ch03-agent-loop-chapter.md) | [ch03.py](checkpoints/profrod_sovereign_agent_ch03_agent_loop_checkpoint.py) |
| 4 | [Build durable state with SQLite](ch04/profrod-sovereign-agent-ch04-sqlite-state-chapter.md) | PLANNED — no executable checkpoint |
| 5 | [Remember across conversations](ch05/profrod-sovereign-agent-ch05-durable-memory-chapter.md) | [ch05.py](checkpoints/profrod_sovereign_agent_ch05_durable_memory_checkpoint.py) |
| 6 | [Reuse a tested opening procedure](ch06/profrod-sovereign-agent-ch06-versioned-skills-chapter.md) | [ch06.py](checkpoints/profrod_sovereign_agent_ch06_versioned_skills_checkpoint.py) |
| 7 | [Build a durable work inbox and report outbox](ch07/profrod-sovereign-agent-ch07-durable-inbox-outbox-chapter.md) | PLANNED — no executable checkpoint |
| 8 | [Talk to the agent from your phone](ch08/profrod-sovereign-agent-ch08-telegram-messaging-chapter.md) | [ch08.py](checkpoints/profrod_sovereign_agent_ch08_telegram_messaging_checkpoint.py) |
| 9 | [Wake up for schedules and stock events](ch09/profrod-sovereign-agent-ch09-schedules-stock-events-chapter.md) | [ch09.py](checkpoints/profrod_sovereign_agent_ch09_schedules_stock_events_checkpoint.py) |
| 10 | [Ask permission before spending](ch10/profrod-sovereign-agent-ch10-spending-permissions-chapter.md) | [ch10.py](checkpoints/profrod_sovereign_agent_ch10_spending_permissions_checkpoint.py) |
| 11 | [Survive the ambiguous supplier order](ch11/profrod-sovereign-agent-ch11-ambiguous-supplier-order-chapter.md) | [ch11.py](checkpoints/profrod_sovereign_agent_ch11_ambiguous_supplier_order_checkpoint.py) |
| 12 | [Recover work after a process crash](ch12/profrod-sovereign-agent-ch12-worker-recovery-chapter.md) | [ch12.py](checkpoints/profrod_sovereign_agent_ch12_worker_recovery_checkpoint.py) |
| 13 | [Connect an external tool with MCP](ch13/profrod-sovereign-agent-ch13-mcp-tools-chapter.md) | PLANNED — no executable checkpoint |
| 14 | [Isolate tools and untrusted content](ch14/profrod-sovereign-agent-ch14-tool-isolation-chapter.md) | [ch14.py](checkpoints/profrod_sovereign_agent_ch14_tool_isolation_checkpoint.py) |
| 15 | [Measure whether the agent helps](ch15/profrod-sovereign-agent-ch15-agent-evaluation-chapter.md) | [ch15.py](checkpoints/profrod_sovereign_agent_ch15_agent_evaluation_checkpoint.py) |
| 16 | [Improve behavior with evaluated changes](ch16/profrod-sovereign-agent-ch16-controlled-improvement-chapter.md) | [ch16.py](checkpoints/profrod_sovereign_agent_ch16_controlled_improvement_checkpoint.py) |
| 17 | [Delegate one bounded task](ch17/profrod-sovereign-agent-ch17-bounded-delegation-chapter.md) | [ch17.py](checkpoints/profrod_sovereign_agent_ch17_bounded_delegation_checkpoint.py) |
| 18 | [Deploy and maintain the agent](ch18/profrod-sovereign-agent-ch18-deployment-restoration-chapter.md) | [ch18.py](checkpoints/profrod_sovereign_agent_ch18_deployment_restoration_checkpoint.py) |
| 19 | [Lucy leaves the shop for a day](ch19/profrod-sovereign-agent-ch19-integrated-shop-day-chapter.md) | [ch19.py](checkpoints/profrod_sovereign_agent_ch19_integrated_shop_day_checkpoint.py) |

The final accelerated day retains two databases, a readable report and JSON evidence:

```bash
uv run --python 3.14 python book/textbook/checkpoints/profrod_sovereign_agent_ch19_integrated_shop_day_checkpoint.py --output /tmp/lucy-day-first-run
```

Use a fresh output path for each retained run; the checkpoint refuses to overwrite it. The independently authored fixture expects two accepted orders totaling 2600 pence. Vanilla ends with eight physical tubs after one receiving event; strawberry has one physical tub and four pending; chocolate stays at twelve. These are fixture expectations, not a business forecast. Its Telegram and model exchanges are simulated. A successful day does not establish a live handset exchange or long-running uptime.

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