# AI-ART Style Registry (Constraints-Compliant)

This document defines **registered visual styles**.
All styles MUST comply with:

- README.md
- prompts/constraints.md

Styles are identified by **STYLE_ID**.
No free-form styles are allowed.

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## 1. Style System Rules

- Each style has a unique STYLE_ID
- Only registered STYLE_IDs may be activated
- Styles are inert unless explicitly activated by task or manifest
- Styles NEVER override constraints.md

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## 2. Registered Styles

### STYLE_ID: FLAT_BASE_01

Status: DEFAULT  
Description: Neutral flat illustration baseline

Rules:
- Illustration-oriented
- Flat or semi-flat rendering
- Minimal shading
- Clean line work
- Neutral lighting
- No effects

Use case:
- Character sheets
- Full-body reference
- Default人物紹介

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### STYLE_ID: FLAT_MUTED_02

Status: OPTIONAL  
Description: Flat style with muted palette

Rules:
- Flat color blocks
- Low saturation
- Soft contrast
- No gradients or glow

Use case:
- Calm tone characters
- Background-less portraits

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### STYLE_ID: LINE_ART_01

Status: OPTIONAL  
Description: Clean line-art focused style

Rules:
- Strong line definition
- Minimal or no fill color
- Uniform line weight
- No texture

Use case:
- Design reference
- Technical character outlines

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## 3. Forbidden Style Behavior

Styles MUST NOT introduce:

- Photorealism
- Cinematic lighting
- Effects, glow, aura
- Narrative implication
- Environmental elements

Any style violating constraints.md is INVALID.

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## 4. Activation Mechanism

Styles are activated ONLY via:

- task_template.md
- or manifest.json

If no STYLE_ID is specified:
- `FLAT_BASE_01` is automatically applied

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## 5. Conflict Resolution

If multiple STYLE_IDs are specified:

- Use the first listed STYLE_ID
- Ignore others
- Do NOT merge styles

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## 6. Extension Policy

To add a new style:

- Assign a new unique STYLE_ID
- Define explicit rules
- Ensure constraints.md compliance
- Never modify existing STYLE_ID behavior

STYLE_IDs are immutable once defined.