# System Endpoints

## Purpose
Document system module endpoints for AI prompts, author profiles, strategies, and system/settings resources.

## Code Locations (exact paths)
- Routing: `backend/igny8_core/modules/system/urls.py`
- Views: `backend/igny8_core/modules/system/views.py`
- Models/serializers: `backend/igny8_core/modules/system/models.py`, `serializers.py`

## High-Level Responsibilities
- Manage account-scoped AI prompts, author profiles, and strategies.
- Expose system/user/module/AI settings endpoints.
- Provide prompt retrieval by type and save/reset helpers with role checks.

## Detailed Behavior
- Base path: `/api/v1/system/`
- Routers register:
  - `prompts/` → `AIPromptViewSet` (CRUD, `by_type`, `save_prompt`, `reset_prompt`)
  - `author-profiles/` → `AuthorProfileViewSet` (CRUD)
  - `strategies/` → `StrategyViewSet` (CRUD)
  - `settings/system`, `settings/account`, `settings/user`, `settings/modules`, `settings/ai` → respective settings viewsets
- AIPromptViewSet:
  - Permissions: `IsAuthenticatedAndActive`, `HasTenantAccess`; throttle scope `system`; paginated.
  - `by_type` returns prompt by prompt_type, or default when missing.
  - `save_prompt`/`reset_prompt` require editor-or-above; set/read account from request/user or first account fallback (dev).
  - Queryset ordered by prompt_type.
- Settings viewsets expose retrieve/update for their scope (system/account/user/modules/ai). Permissions and scoping follow AccountModelViewSet.
- AuthorProfile/Strategy viewsets provide standard CRUD under account scoping.

## Data Structures / Models Involved (no code)
- `AIPrompt` (prompt_type, prompt_value, default_prompt, is_active), `AuthorProfile`, `Strategy`, settings models.

## Execution Flow
- Requests → DRF auth → AccountModelViewSet filtering → serializer validation → model CRUD → unified responses. Custom actions handle prompt save/reset/type lookups.

## Cross-Module Interactions
- Prompts are consumed by AI functions; settings may influence module behavior (e.g., AI config).

## State Transitions
- Prompt updates, resets; settings updates; author profile/strategy CRUD.

## Error Handling
- Unified errors; 403 when lacking editor role for prompt save/reset; 400 on missing prompt_type/value.

## Tenancy Rules
- All resources are account scoped via AccountModelViewSet and permissions.

## Billing Rules
- None; prompts/settings do not affect credits directly.

## Background Tasks / Schedulers
- None.

## Key Design Considerations
- Prompt defaults are returned when custom prompt missing to keep AI flows resilient.
- Editor-or-above requirement protects prompt modifications.

## How Developers Should Work With This Module
- Use provided viewsets/actions; ensure account context is set. Extend settings endpoints by adding serializers/models and wiring to the router.