> ## Documentation Index
> Fetch the complete documentation index at: https://docs-unity.molca.id/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Who this documentation is for, how Molca Core relates to product SDKs (VR, DT), and how to navigate the site.

## Audience

Engineers **integrating or extending** Molca Unity products: [Molca Core](/core/runtime-manager), optional [shared UI module](/shared/game-manager), the [VR training SDK](/vr/sdk-overview), or the [Digital Twin SDK](/dt/overview).

## Which repository?

Molca ships **more than one** Unity repo. See **[SDKs and repositories](/overview/platforms)** for paths (e.g. **molca-sdk-vr**, **molca-sdk-dt**) and which sections apply.

| Area              | Example path               | Doc section                           |
| ----------------- | -------------------------- | ------------------------------------- |
| **Molca Core**    | `Packages/com.molca.core/` | [Molca Core](/core/runtime-manager)   |
| **Shared module** | `Assets/_MolcaSDK/Code/`   | [Shared module](/shared/game-manager) |
| **VR SDK**        | `Assets/_MolcaSDK/_VR/`    | [Molca VR SDK](/vr/sdk-overview)      |
| **DT SDK**        | `Assets/_MolcaDT/`         | [Digital Twin](/dt/overview)          |

## Documentation map

| Section                                                                | Contents                                                                                          |
| ---------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------- |
| [Platforms](/overview/platforms)                                       | Which SDK lives where; what applies to VR vs DT                                                   |
| [Architecture](/overview/architecture)                                 | **Product-neutral:** Core vs Unity; VR / DT / Shared placement                                    |
| [Runtime and settings](/overview/runtime-and-settings)                 | MolcaProjectSettings → RuntimeManager → GlobalSettings and subsystems                             |
| [Compatibility and validation](/overview/compatibility-and-validation) | SDK assumptions, versioning, and doc validation conventions                                       |
| [Troubleshooting](/overview/troubleshooting)                           | Common runtime/integration failures and first checks                                              |
| **Molca Core**                                                         | Runtime, DI, events, references, sequences, HTTP, modals, content packages                        |
| **Shared module**                                                      | Generic UI, preload, media (often bundled with VR templates)                                      |
| **Molca VR SDK**                                                       | [VR overview](/vr/sdk-overview): architecture, content hierarchy, setup, scenarios, tour, scoring |
| **Molca DT SDK**                                                       | [DT overview](/dt/overview) + [DT architecture](/dt/architecture): `_MolcaDT` layout, flows, POI  |

## Suggested reading

| Product                 | Path                                                                                                                                                                                                                                                                                                                                                  |
| ----------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **VR training**         | [Platforms](/overview/platforms) → [Architecture](/overview/architecture) → [VR overview](/vr/sdk-overview) → [VR architecture](/vr/architecture) → [Runtime and settings](/overview/runtime-and-settings) → [VR setup](/setup/scenario-data-config) → [Session flow how-to](/setup/vr-session-flow-how-to) → [ScenarioManager](/vr/scenario-manager) |
| **Digital Twin**        | [Platforms](/overview/platforms) → [Architecture](/overview/architecture) → [Runtime and settings](/overview/runtime-and-settings) → [DT overview](/dt/overview) → [DT architecture](/dt/architecture) → [DT layout](/dt/project-layout)                                                                                                              |
| **Core-only / library** | [Runtime and settings](/overview/runtime-and-settings) → [Project settings](/setup/molca-project-settings) → [RuntimeManager](/core/runtime-manager)                                                                                                                                                                                                  |