hz-platform-sdk

hz-platform-sdk is a skill for Claude Code from meta-quest/agentic-tools. It costs 135 tokens per session (885 once invoked), scanned A, original, Apache-2.0.

A guide for adding Meta’s Horizon Platform SDK to Android apps written in Kotlin for Meta Quest and Horizon OS. The SDK provides platform services such as achievements, purchases, users, leaderboards, and notifications.

In plain words
What is it for?
Use it when connecting Quest apps to Horizon services, including achievements, in-app purchases, user accounts, leaderboards, presence, entitlements, lifecycle events, or abuse reports.
Why use it?
It helps developers understand setup, dependencies, public APIs, and error messages without piecing together separate platform documents.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the meta-vr plugin — 36 skills, 1 MCP server shipped together

Good fit Use it when connecting Quest apps to Horizon services, including achievements, in-app purchases, user accounts, leaderboards, presence, entitlements, lifecycle events, or abuse reports.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/meta-quest/agentic-tools/hz-platform-sdk
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add meta-quest/agentic-tools --skill hz-platform-sdk
Clone the repo
git clone --depth 1 https://github.com/meta-quest/agentic-tools

Made for: Claude Code.

Or install meta-vr, the plugin that ships this one along with the rest of its 36 skills, 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for hz-platform-sdk

README.md
[![agentmods](https://agentmods.dev/badge/skills/meta-quest/agentic-tools/hz-platform-sdk/github.svg)](https://agentmods.dev/skills/meta-quest/agentic-tools/hz-platform-sdk)
Your own site
<a href="https://agentmods.dev/skills/meta-quest/agentic-tools/hz-platform-sdk"><img src="https://agentmods.dev/badge/skills/meta-quest/agentic-tools/hz-platform-sdk/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for hz-platform-sdk

Your own site · 80×15
<a href="https://agentmods.dev/skills/meta-quest/agentic-tools/hz-platform-sdk"><img src="https://agentmods.dev/badge/skills/meta-quest/agentic-tools/hz-platform-sdk.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 135 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 885 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Rogue Agent · line 29
    Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.
    Fix: Prevent the skill from modifying its own code, SKILL.md, or configuration files. Treat skill files as read-only at runtime.
  • high Privilege Escalation · line 43
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00135 $0.00885
Opus 5.5 $0.00054 $0.00354
Sonnet 5.5 $0.00027 $0.00177
Haiku 4.5 $0.00014 $0.00089

Measured 1mo ago against content hash ddfc1adfd0e3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

hz-platform-sdk scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/hz-platform-sdk/SKILL.md · 57 lines

How it starts

The opening of the file, as written. The whole thing — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Horizon Platform SDK - Android/Kotlin Integration Guide

This is the API-reference skill for the Standard Android and Meta Spatial SDK Android/Kotlin build paths. For a guided codebase-analysis and integration workflow, use hz-psdk-integration. For Unity/C#, use hz-unity-platform-sdk instead.

When to Use

Use this skill when a developer:

  • Wants to integrate any Horizon Platform SDK feature in a Meta VR Android/Kotlin application
  • Asks about setup, initialization, or dependencies for the SDK
  • Needs help with a specific public platform API (achievements, IAP, users, etc.)
  • Is troubleshooting errors or status codes from any SDK package
  • Asks about HorizonServiceConnection, entitlements, or HzPlatformService

Quick Start

Available APIs

Feature Reference Description
Abuse Report abuse-report Listen for report button events in the system panel
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, log deeplink results
Asset File asset-file List, download, cancel, and delete downloadable asset files (DLC)
Consent consent Check and launch user consent flows
Device Application Integrity device-application-integrity Verify device and app integrity tokens
Entitlements entitlements Verify app purchase legitimacy and user authorization
Group Presence group-presence Set/clear presence, manage sessions, send invites, launch panels
In-App Purchases (IAP) iap Retrieve products, purchase history, checkout flow, consume purchases
Language Pack language-pack Get/set language packs, track localization downloads
Leaderboards leaderboards Retrieve leaderboard info, fetch/write entries with filtering
Notifications notifications Send device notifications with actions and icons
Rate and Review rate-and-review Check eligibility and launch the rating/review UI
Rich Presence rich-presence Set/clear rich presence status and destinations (deprecated; prefer group-presence)
User Age Category user-age-category Query user age group and report age categories
Users users Retrieve user profiles, friends, access tokens, identity verification

Read the full file on GitHub · 57 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago Changed · +6 lines · +43 tokens per session ddfc1adfd0e3
  2. 2mo ago First seen · 51 lines · 92 tokens per session scan A 338c846489f1

Subscribe to this mod's changes

hz-platform-sdk is a skill published in the GitHub repository meta-quest/agentic-tools (245 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 135 tokens to every session and 885 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

hz-platform-sdk compared with skills from other repositories

hz-platform-sdk next to 6 skills from other repositories
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