## Example

```json
{
  "aiInstructions": {
    "generateFactionDetails": {
      "custom": "## Presentation\nDistinguish public face from operating reality. A faction's stated purpose and its actual methods are rarely identical. Member NPCs embody faction values through behavior and priorities — not explicit declarations of loyalty."
    }
  }
}
```

## Fields

### custom

The only key — free-form rules for how factions read beneath their public face.

## Authoring pattern

Cover in `custom`:

- Public face vs. operating reality per faction — the stated purpose and the actual methods are rarely the same.
- How member NPCs reflect faction values: through behavior and priorities, not by making loyalty statements.