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 cruisediary/apple-app-review-skills --skill sign-in-with-applegit clone --depth 1 https://github.com/cruisediary/apple-app-review-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/cruisediary/apple-app-review-skills/sign-in-with-apple)<a href="https://agentmods.dev/skills/cruisediary/apple-app-review-skills/sign-in-with-apple"><img src="https://agentmods.dev/badge/skills/cruisediary/apple-app-review-skills/sign-in-with-apple/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/cruisediary/apple-app-review-skills/sign-in-with-apple"><img src="https://agentmods.dev/badge/skills/cruisediary/apple-app-review-skills/sign-in-with-apple.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 | $0.00042 | $0.02114 |
| Opus 5 | $0.00021 | $0.01057 |
| Sonnet 5 | $0.00008 | $0.00423 |
| Haiku 4.5 | $0.00004 | $0.00211 |
Grade A, and why
sign-in-with-apple 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 — 153 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skill: Sign in with Apple
Purpose
Detects apps that offer third-party social login (Google, Facebook, Twitter/X, etc.) without offering Sign in with Apple, violating Guideline 4.8 — which requires Sign in with Apple wherever third-party authentication is used.
Apple Guideline
- Primary: 4.8 — Design: Sign in with Apple
- Related: 5.1.1(i)
- Reference:
references/guidelines/4-design.md
Real-World Rejection Cases
-
Case: App offered Google Sign-In and Facebook Login as the only login options — rejected under Guideline 4.8 Source: Apple Developer Forums (multiple threads, 2020–2024) Root cause: Guideline 4.8 requires apps that use third-party or social login to also offer Sign in with Apple as an equivalent option. Apple enforced this starting June 30, 2020.
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Case: App updated to add Instagram OAuth login — Apple rejected the update for missing Sign in with Apple, even though the app had previously passed review without it Source: Developer experience, 2023 Root cause: Adding any new third-party auth method after the June 2020 deadline triggers the Sign in with Apple requirement for the entire app.
-
Case: App used "Login with Twitter" for a social feature — rejected; developer assumed the rule didn't apply to secondary/optional login methods Source: Apple Developer Forums Root cause: The rule applies to any third-party authentication — not just the primary login, but also secondary social login options like Twitter, LinkedIn, or GitHub.
-
Case: App offered only Facebook Login as the sole authentication option — developer believed Sign in with Apple was only required when offering multiple social login providers — rejected under Guideline 4.8 Source: Apple Developer Forums (multiple developer reports, 2020–2024) Root cause: Sign in with Apple is required whenever any third-party or social authentication is offered, regardless of whether it is the only login option or one of several — offering a single social provider does not exempt the app from Guideline 4.8
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 · 153 lines · 42 tokens per session scan A 9ac6e99ad972
sign-in-with-apple is a skill published in the GitHub repository cruisediary/apple-app-review-skills (16 stars, last pushed 4mo ago), licensed MIT. It adds 42 tokens to every session and 2,114 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 2026-09-05.
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