A guide for designing, building, reviewing, submitting, or revising Apple-platform apps with App Store rules in mind.

Use it when preparing an iPhone, iPad, or other Apple-platform app for review or updating an existing one.

It helps identify product, privacy, permissions, payments, metadata, and user-content issues that can affect App Store review.

isaac — Skill for Claude Code and Codex by wundercorp

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 wundercorp/builderstudio-skills --skill isaac-skill

Clone the repo

git clone --depth 1 https://github.com/wundercorp/builderstudio-skills

Made for: Claude Code, Codex.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/wundercorp/builderstudio-skills/isaac-skill/github.svg)](https://agentmods.dev/skills/wundercorp/builderstudio-skills/isaac-skill)

Your own site

<a href="https://agentmods.dev/skills/wundercorp/builderstudio-skills/isaac-skill"><img src="https://agentmods.dev/badge/skills/wundercorp/builderstudio-skills/isaac-skill/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/wundercorp/builderstudio-skills/isaac-skill"><img src="https://agentmods.dev/badge/skills/wundercorp/builderstudio-skills/isaac-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 98 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 4,458 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.

Origin unknown 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.

Model	Per session	Once invoked
Fable 5.1	$0.00098	$0.04458
Opus 5.5	$0.00039	$0.01783
Sonnet 5.5	$0.00020	$0.00892
Haiku 4.5	$0.00010	$0.00446

Measured 2mo ago against content hash 067447c390c2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

isaac 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 2mo ago.

The scan reads SKILL.md. This mod also ships 4 executable files (scripts/check-isaac.mjs, scripts/install-isaac-hooks.sh, scripts/isaac-audit.mjs, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skill-repositories/isaac-skill/SKILL.md · 450 lines

The source is not reproduced here

No licence file

Read it on GitHub

Files

What ships with it

14 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.

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.

2mo ago First seen · 450 lines · 98 tokens per session scan A 067447c390c2

Subscribe to this mod's changes

isaac is a skill published in the GitHub repository wundercorp/builderstudio-skills (9 stars, last pushed 5mo ago), with no licence file. It adds 98 tokens to every session and 4,458 once invoked, about $0.0004 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 2026-08-31.

Legal and compliance Mobile ai-skill builderstudio developer-tools documentation skill-catalog skill-repository

isaac next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
isaacwundercorp/builderstudio-skills	Skill	9	5mo ago	none	A	98	Claude Code, Codex
play-policy-insightsandroid/skills	Skill	10k	yesterday	Apache-2.0	A	66	Claude Code
account-deletionrshankras/claude-code-apple-skills	Skill	864	2d ago	MIT	A	57	Claude Code
consent-flowrshankras/claude-code-apple-skills	Skill	864	2d ago	MIT	A	54	Claude Code
app-store-reviewsafaiyeh/app-store-review-skill	Skill	443	21d ago	MIT	A	76	Claude Code, Codex
gplay-submission-checkshanamizuki/solopreneur	Skill	156	3d ago	MIT	A	45	Claude Code
appstore-review-checkerluongnv89/skills	Skill	145	yesterday	MIT	A	42	Claude Code