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 rshankras/claude-code-apple-skills --skill referral-systemgit clone --depth 1 https://github.com/rshankras/claude-code-apple-skillsWrote 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/rshankras/claude-code-apple-skills/referral-system)<a href="https://agentmods.dev/skills/rshankras/claude-code-apple-skills/referral-system"><img src="https://agentmods.dev/badge/skills/rshankras/claude-code-apple-skills/referral-system/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/rshankras/claude-code-apple-skills/referral-system"><img src="https://agentmods.dev/badge/skills/rshankras/claude-code-apple-skills/referral-system.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00041 | $0.02183 |
| Opus 5 | $0.00020 | $0.01092 |
| Sonnet 5 | $0.00008 | $0.00437 |
| Haiku 4.5 | $0.00004 | $0.00218 |
Grade A, and why
referral-system 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 7d 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.
How it starts
The opening of the file, as written. The whole thing — 285 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Referral System Generator
Generate a production referral/invite system with unique code generation, deep link sharing, reward tracking, fraud prevention, and SwiftUI views for inviting friends and monitoring referral performance.
When This Skill Activates
Use this skill when the user:
- Asks to "add a referral system" or "referral codes"
- Wants to "invite friends" or "refer a friend" flow
- Mentions "viral growth" or "invitation system"
- Asks about "referral rewards" or "referral tracking"
- Wants "invite codes" or "shareable invite links"
Pre-Generation Checks
1. Project Context Detection
- Check Swift version (requires Swift 5.9+)
- Check deployment target (iOS 17+ / macOS 14+ for @Observable and SwiftData)
- Identify source file locations
- Check for existing entitlements (Associated Domains for deep links)
2. Conflict Detection
Search for existing referral/invite code:
Glob: **/*Referral*.swift, **/*Invite*.swift, **/*InviteCode*.swift
Grep: "referralCode" or "inviteCode" or "ReferralManager"
If existing referral system found:
- Ask if user wants to replace or extend it
- If extending, identify integration points
3. Deep Link Setup Detection
Search for existing deep link handling:
Glob: **/*DeepLink*.swift, **/*UniversalLink*.swift
Grep: "onOpenURL" or "userActivity" or "NSUserActivity"
If deep link handling exists, integrate with it rather than generating a standalone handler.
Configuration Questions
Ask user via AskUserQuestion:
-
Reward type?
- Both-get (referrer and invitee both earn a reward) -- recommended
- Referrer-only (only the person who shares gets rewarded)
- Points-based (both parties earn points toward rewards)
-
Code format?
- Short alphanumeric (e.g.,
A7K2M9) -- recommended - Custom prefix (e.g.,
MYAPP-A7K2M9) - Username-based (e.g.,
john-A7K2)
- Short alphanumeric (e.g.,
-
Sharing method?
- Deep link (universal link with embedded code) -- recommended
- Clipboard copy (copy code to pasteboard)
- Share sheet (system share with link and message)
- All of the above
What ships with it
1 file 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.
- 7d ago First seen · 285 lines · 41 tokens per session scan A ca60582d8d6a
referral-system is a skill published in the GitHub repository rshankras/claude-code-apple-skills (713 stars, last pushed 1mo ago), licensed MIT. It adds 41 tokens to every session and 2,183 once invoked, about $0.0002 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 2026-09-03.
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