Systems Layer - AI Business Logic Contract

Golden Rule #1: Stateless is Law

System classes MUST NOT interact with or know about HTML or the DOM in any way.
FORBIDDEN:
```
document.querySelector
```
,
```
element.innerHTML
```
, etc.

Validation methods MUST return a structured object:

{ isValid: boolean, errors: string[], warnings: string[] }

Role: To encapsulate the rules of the game.
Contract: Stateless is Law: All methods MUST be
```
static
```
. Systems are stateless collections of functions and must not have a
```
constructor
```
.
The System Workflow: Every action should have a
```
validate...()
```
method and a
```
perform...()
```
method. "Write" methods must take the
```
character
```
object as an argument.
Forbidden: Systems MUST NOT interact with the DOM. They MUST NOT import from other
```
System
```
classes.

System classes MUST NOT interact with or know about HTML or the DOM in any way.
FORBIDDEN:
```
document.querySelector
```
,
```
element.innerHTML
```
, etc.

Validation methods MUST return a structured object:

{ isValid: boolean, errors: string[], warnings: string[] }

Role: To encapsulate the rules of the game.
Contract: Stateless is Law: All methods MUST be
```
static
```
. Systems are stateless collections of functions and must not have a
```
constructor
```
.
The System Workflow: Every action should have a
```
validate...()
```
method and a
```
perform...()
```
method. "Write" methods must take the
```
character
```
object as an argument.
Forbidden: Systems MUST NOT interact with the DOM. They MUST NOT import from other
```
System
```
classes.