Horizon Platform SDK - Unity/C# Integration Guide

When to Use

Use this skill when a developer:

• Wants to integrate any Horizon Platform SDK feature in a Unity Meta Quest application
• Asks about setup, initialization, or dependencies for the Unity SDK package (com.meta.xr.sdk.platform)
• Needs help with a specific public platform API (achievements, IAP, users, etc.) in C#
• Is troubleshooting errors or status codes from any SDK package in Unity
• Asks about Core.AsyncInitialize, Oculus.Platform, or platform message handling

For Android/Kotlin apps, use the hz-platform-sdk skill instead.

Quick Start

• Setup guide: https://developers.meta.com/horizon/documentation/unity/ps-platform-intro/
• UPM Package: com.meta.xr.sdk.platform via Unity Package Manager
• Namespace: Oculus.Platform (backward compatible with legacy LibOVRPlatform SDK)

Available APIs

Feature	Reference	Description
Abuse Report	abuse-report	Listen for system Report button events, respond with in-app flow
Achievements	achievements	Unlock, track progress, and query simple/count/bitfield achievements
Application	application	Get app version, launch other apps, manage self-update downloads
Application Lifecycle	application-lifecycle	Detect launch type, handle deeplinks and invites, log results
Asset File	asset-file	List, download, cancel, and delete downloadable asset files (DLC)
Challenges	challenges	Time-bound score competitions on top of leaderboards
Consent	consent	Check and launch user consent flows with version bumps
Device Application Integrity	device-application-integrity	Verify device and app integrity via JWT attestation
Entitlements	entitlements	Mandatory anti-piracy check required for all Store apps
Group Presence	group-presence	Set/clear presence, manage sessions, send invites, handle join intents
In-App Purchases (IAP)	iap	Retrieve products, purchase history, checkout flow, consume purchases
Language Pack	language-pack	Get/set language packs with auto-download
Leaderboards	leaderboards	Retrieve leaderboard info, fetch/write entries with filtering
Notifications	notifications	Send device notifications with toast, feed persistence, and action buttons
Rate and Review	rate-and-review	Check eligibility and launch the system rating/review UI
Rich Presence	rich-presence	Set/clear rich presence (deprecated; prefer group-presence)
User Age Category	user-age-category	Query user age group and report age categories for compliance
Users	users	Retrieve user profiles, friends, access tokens, identity verification

How to Use

1. First, read references/common-setup.md for shared setup instructions, initialization code, Editor testing, and common patterns that apply to all APIs.
2. Then, read the specific reference file for the API you need (e.g., references/iap.md for in-app purchases).

Each reference file contains only the package-specific content: API operations, data types, examples, and package-specific notes. The common setup, initialization patterns, and coding conventions are centralized in common-setup.md to avoid duplication.