# Chapter 01 Safe Read-Only Exercise Pack

This set of fictional texts was designed specifically for Chapter 01. It contains no real clients, projects, accounts, keys, or production files.

## Boundaries

- Allowed: ask ChatGPT / Codex to **read** `brief.md` and `meeting-notes.md` in this folder.
- Not allowed: modify, rename, move, or delete any file; search the web; access anything outside this folder; send, publish, or connect to a third-party service.
- Goal: produce three structured sections: “Confirmed facts / Judgement / Questions to confirm”.

## Files

- `brief.md`: fictional exercise background and explicit facts.
- `meeting-notes.md`: fictional preparation notes, with decided and unresolved items.
- `acceptance.md`: the task prompt, acceptance criteria, and file-integrity checks.
- `checksum-baseline-sha256.txt`: SHA-256 baseline values for the two input files.
- `reference-output.md`: a reference structure that keeps facts, judgement, and questions to confirm separate; it is not a real account task record.

## Integrity check before and after use

In the macOS Terminal, while in this folder, run the following before and after the task:

```zsh
shasum -a 256 brief.md meeting-notes.md
```

The two result lines must be exactly the same both times. That is the evidence that the exercise did not change its input files.