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.
npx skills add tomkrikorian/visionOSAgents --skill arkit-hand-tracking-providergit clone --depth 1 https://github.com/tomkrikorian/visionOSAgentsWrote 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.
[](https://agentmods.dev/skills/tomkrikorian/visionosagents/arkit-hand-tracking-provider)<a href="https://agentmods.dev/skills/tomkrikorian/visionosagents/arkit-hand-tracking-provider"><img src="https://agentmods.dev/badge/skills/tomkrikorian/visionosagents/arkit-hand-tracking-provider/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.
<a href="https://agentmods.dev/skills/tomkrikorian/visionosagents/arkit-hand-tracking-provider"><img src="https://agentmods.dev/badge/skills/tomkrikorian/visionosagents/arkit-hand-tracking-provider.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00054 | $0.00490 |
| Opus 5 | $0.00027 | $0.00245 |
| Sonnet 5 | $0.00011 | $0.00098 |
| Haiku 4.5 | $0.00005 | $0.00049 |
Grade A, and why
arkit-hand-tracking-provider 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 12d 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.
What it actually says
ARKit Hand Tracking Provider
Quick Start
- Confirm the task needs raw hand/joint data; use SwiftUI or RealityKit gestures when high-level interaction is enough.
- Load the shared session guidance and the hand provider reference.
- Add hands privacy text and request the provider's required authorizations.
- Keep joint processing in a model layer, then bridge to SwiftUI or RealityKit only where needed.
Load References When
| Reference | When to Use |
|---|---|
session-basics.md |
When setting up ARKitSession, authorization, event handling, or teardown. |
hand-tracking-provider.md |
When using HandTrackingProvider, HandAnchor, or joint transforms. |
anchor-processing.md |
When reconciling hand anchor updates into app state. |
realitykit-bridge.md |
When visualizing hands or driving RealityKit entities. |
Workflow
- Check
HandTrackingProvider.isSupported. - Request
HandTrackingProvider.requiredAuthorizations. - Run the provider in a long-lived
ARKitSession. - Process update sequences off the SwiftUI body path.
- Cancel the update task and stop the session on teardown.
Guardrails
- Do not use raw hand tracking for ordinary taps, drags, or gaze-targeted UI that platform gestures already handle.
- Do not assume both hands or every joint are always tracked.
- Treat hand-tracking denial as a feature-level unavailable state, not as an app launch failure.
Output Expectations
Provide:
- whether raw hand tracking is actually required
- which hand provider references were used
- the authorization and unsupported-device behavior
- the joint processing and rendering path
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 12d ago First seen · 49 lines · 54 tokens per session scan A aee52acd1b20
arkit-hand-tracking-provider is a skill published in the GitHub repository tomkrikorian/visionOSAgents (61 stars, last pushed 2mo ago), licensed MIT. It adds 54 tokens to every session and 490 once invoked, about $0.0003 per session on Opus 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.
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