A cross-checking skill that type-checks shared packages against the iOS and watchOS software development kits. It is intended for use after core-package edits, before verification, or when CI reports a cross-check failure.

Use it to check shared packages for platform-incompatible imports and APIs, and to keep app-specific code out of the shared core.

Code that works on macOS can still use APIs unavailable on iOS or watchOS. This check catches those platform mismatches before they reach CI or users.

How hoangsonww/Diffuse-Native-Apps configures Claude Code and Codex

Reuse

Borrowing it

Nothing to install: this file belongs to hoangsonww/Diffuse-Native-Apps. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/hoangsonww/Diffuse-Native-Apps/master/.agents/skills/crosscheck/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/hoangsonww/Diffuse-Native-Apps

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/hoangsonww/diffuse-native-apps/crosscheck/github.svg)](https://agentmods.dev/skills/hoangsonww/diffuse-native-apps/crosscheck)

Your own site

<a href="https://agentmods.dev/skills/hoangsonww/diffuse-native-apps/crosscheck"><img src="https://agentmods.dev/badge/skills/hoangsonww/diffuse-native-apps/crosscheck/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/hoangsonww/diffuse-native-apps/crosscheck"><img src="https://agentmods.dev/badge/skills/hoangsonww/diffuse-native-apps/crosscheck.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 142 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 original 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	$0.00033	$0.00142
Opus 5.5	$0.00013	$0.00057
Sonnet 5.5	$0.00007	$0.00028
Haiku 4.5	$0.00003	$0.00014

Measured yesterday against content hash f8722bc0cc27, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

crosscheck 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 yesterday.

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.

.agents/skills/crosscheck/SKILL.md · 18 lines

What it actually says

Cross-check

Core packages must compile for iOS and watchOS even when you developed on macOS.

./Scripts/crosscheck.sh ios
./Scripts/crosscheck.sh watchos

Failures usually mean an AppKit/UIKit import leaked into Packages/Diffuse* core, or an API that does not exist on that SDK.

Do not skip this to land a Mac-only type in Core. Put it in the app target or DiffuseCollectors behind the right registry.

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.

yesterday First seen · 18 lines · 33 tokens per session scan A f8722bc0cc27

Subscribe to this mod's changes

crosscheck is a skill published in the GitHub repository hoangsonww/Diffuse-Native-Apps (11 stars, last pushed 1mo ago), licensed MIT. It adds 33 tokens to every session and 142 once invoked, about $0.0001 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 2026-11-07.

Mobile Testing android device-monitoring gradle ios ipados jetpack-compose

crosscheck next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
crosscheckhoangsonww/Diffuse-Native-Apps	Skill	11	1mo ago	MIT	A	33	Claude Code, Codex
motion-design-prokelvinkosbab/AppBootstrapAI	Skill	8	yesterday	MIT	A	129	Claude Code
android-adaptive-layout-prokelvinkosbab/AppBootstrapAI	Skill	8	yesterday	MIT	A	147	Claude Code
android-gradle-architecture-prokelvinkosbab/AppBootstrapAI	Skill	8	yesterday	MIT	A	74	Claude Code
r8-shrink-prokelvinkosbab/AppBootstrapAI	Skill	8	yesterday	MIT	A	87	Claude Code
xml-to-compose-migration-prokelvinkosbab/AppBootstrapAI	Skill	8	yesterday	MIT	A	78	Claude Code
swift-adaptive-layout-prokelvinkosbab/AppBootstrapAI	Skill	8	yesterday	MIT	A	129	Claude Code

Diffuse-Native-Apps: Skill for Claude Code