# Shared Schemas

Shared types used across artifacts

Canonical URL: https://docs.paradoc.dev/schemas/artifacts/shared/

Paradoc defines shared types that are used across multiple artifact types.

| Type                                                | Description                                                                     |
| --------------------------------------------------- | ------------------------------------------------------------------------------- |
| [Layer](/schemas/artifacts/shared/layer)            | Rendering output specification (inline or file-backed)                          |
| [ContentRef](/schemas/artifacts/shared/content-ref) | Inline text or file-backed content reference (instructions, agent instructions) |
| [Defs & Rules](/schemas/artifacts/shared/logic)     | Typed computed values and validation rules                                      |