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 subscription-lifecyclegit 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/subscription-lifecycle)<a href="https://agentmods.dev/skills/rshankras/claude-code-apple-skills/subscription-lifecycle"><img src="https://agentmods.dev/badge/skills/rshankras/claude-code-apple-skills/subscription-lifecycle/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/subscription-lifecycle"><img src="https://agentmods.dev/badge/skills/rshankras/claude-code-apple-skills/subscription-lifecycle.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 | $0.00055 | $0.03347 |
| Opus 5 | $0.00028 | $0.01673 |
| Sonnet 5 | $0.00011 | $0.00669 |
| Haiku 4.5 | $0.00006 | $0.00335 |
Grade A, and why
subscription-lifecycle 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 5d 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 — 399 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Subscription Lifecycle Generator
Generate production StoreKit 2 subscription lifecycle management with real-time status monitoring, grace period handling, billing retry detection, offer code redemption, win-back offers, and upgrade/downgrade path support.
Different from paywall-generator: The paywall generator handles the purchase UI and initial transaction. This skill handles everything that happens after purchase — monitoring subscription state changes, handling payment failures, retaining churning users, and managing tier transitions.
Why retention math dominates acquisition (per Apple's Tech Talk):
- Commission compounds: 70% net in year one → 85% once a subscriber passes 1 year. Retained subscribers are literally worth more per renewal.
- The base compounds harder: from 10,000 subscribers, 12 months later 85% monthly retention leaves 1,673; 90% leaves 3,487; 95% leaves 5,688. A 5-point retention gain more than doubles the surviving base.
When This Skill Activates
Use this skill when the user:
- Asks about "subscription management" or "subscription lifecycle"
- Mentions "grace period handling" or "grace period UI"
- Wants "billing retry" detection or payment failure handling
- Asks about "win-back offers" or "re-engagement offers"
- Mentions "subscription status" monitoring or dashboard
- Wants "upgrade/downgrade" path management
- Asks about "offer codes" or "promotional offers"
- Mentions "subscription churn" or "retention"
- Wants to "track subscription state changes"
Pre-Generation Checks
1. Project Context Detection
- Check deployment target (StoreKit 2 requires iOS 15+)
- Check for @Observable support (iOS 17+ / macOS 14+)
- Check Swift version (requires Swift 5.9+)
- Identify source file locations
2. Existing StoreKit Detection
Search for existing subscription code:
Glob: **/*Store*.swift, **/*Subscription*.swift, **/*Entitlement*.swift
Grep: "import StoreKit" or "Transaction.updates" or "Product.SubscriptionInfo"
What ships with it
2 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.
- 5d ago First seen · 399 lines · 55 tokens per session scan A 428c7eda3697
subscription-lifecycle is a skill published in the GitHub repository rshankras/claude-code-apple-skills (710 stars, last pushed 1mo ago), licensed MIT. It adds 55 tokens to every session and 3,347 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 2026-09-03.
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