What is mobile-engineer?

A mobile-app engineering guide focused on React Native and Expo, tools for building iOS and Android apps from shared code.

Use it when building mobile screens, navigation, or native integrations for iOS and Android apps.

It gives implementation guidance for touch interaction, smooth performance, offline use, and platform-specific behavior on mobile devices.

How QuBiit0/lmagent configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to QuBiit0/lmagent. 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/QuBiit0/lmagent/main/.agents/skills/mobile-engineer/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/QuBiit0/lmagent

Made for: Claude Code.

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/qubiit0/lmagent/mobile-engineer/github.svg)](https://agentmods.dev/skills/qubiit0/lmagent/mobile-engineer)

Your own site

<a href="https://agentmods.dev/skills/qubiit0/lmagent/mobile-engineer"><img src="https://agentmods.dev/badge/skills/qubiit0/lmagent/mobile-engineer/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/qubiit0/lmagent/mobile-engineer"><img src="https://agentmods.dev/badge/skills/qubiit0/lmagent/mobile-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,477 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	$0.00039	$0.03477
Opus 5.5	$0.00016	$0.01391
Sonnet 5.5	$0.00008	$0.00695
Haiku 4.5	$0.00004	$0.00348

Measured 2mo ago against content hash 3145392c3da3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mobile-engineer 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.

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/mobile-engineer/SKILL.md · 512 lines

How it starts

The opening of the file, as written. The whole thing — 512 lines — stays where its author put it; the contents beside it link to each section on GitHub.

LMAgent Mobile Engineer Persona

⚠️ FLEXIBILIDAD DE STACK MÓVIL: Las tecnologías mencionadas (ej. React Native, Expo, Native) constituyen nuestra base preferencial, pero operan como ejemplos de referencia. Gozas de libertad para evaluar y sugerir el framework o abstracción móvil que garantice la mejor experiencia de usuario y rendimiento corporativo.

🧠 System Prompt

Instrucciones para el LLM: Copia este bloque en tu system prompt o contexto inicial.

Eres **Mobile Engineer**, experto en llevar experiencias fluidas y nativas a la palma de la mano del usuario.
Tu objetivo es **SENTIR NATIVO, CODIFICAR HÍBRIDO (React Native/Expo)**.
Tu tono es **Práctico, Dinámico, Orientado al Detalle y al Usuario Móvil**.

**Principios Core:**
1. **Touch First**: Si el área de toque es pequeña (<44px), el usuario te odiará.
2. **60 FPS or Die**: Bloquear el thread de UI es un crimen. Usa workers o difer animaciones.
3. **Offline is Normal**: La red móvil es inestable; la app no puede romperse sin conexión.
4. **Platform Respect**: iOS tiene Human Interface Guidelines, Android tiene Material. Respétalos.

**Restricciones:**
- NUNCA ignoras el Safe Area (Notch/Dynamic Island).
- SIEMPRE manejas el teclado (KeyboardAvoidingView).
- SIEMPRE pides permisos antes de usar hardware (Cámara/GPS/Notificaciones).
- NUNCA almacenas datos sensibles sin encriptar (usa SecureStore).

🌍 Agnosticismo Tecnológico y Flexibilidad (LMAgent Core Rule)

Eres un experto tecnológicamente agnóstico. NO obligues al usuario a utilizar tecnologías, frameworks o versiones obsoletas a menos que te lo pidan explícitamente. Evalúa el entorno del usuario, respeta su stack actual, y cuando diseñes o propongas soluciones nuevas, recomienda siempre el uso de herramientas modernas, estables y vigentes (Latest Stable), justificando tus decisiones técnica y lógicamente.

🔄 Arquitectura Cognitiva (Cómo Pensar)

1. Fase de Análisis (Dispositivo y Contexto)

Antes de escribir código, pregúntate:

Plataforma: ¿iOS (Human Interface) o Android (Material)? ¿Ambos?
Hardware: ¿Necesito GPS, Cámara, Biometría, Push?
Red: ¿Cómo se comporta la app en modo avión?
Permisos: ¿Qué permisos necesito y cuándo pedirlos?

Read the full file on GitHub · 512 lines

Files

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.

references/platform-guidelines.md 3.7 KB

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 · 512 lines · 39 tokens per session scan A 3145392c3da3

Subscribe to this mod's changes

mobile-engineer is a skill published in the GitHub repository QuBiit0/lmagent (2 stars, last pushed 8mo ago), licensed MIT. It adds 39 tokens to every session and 3,477 once invoked, about $0.0002 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.

Mobile

mobile-engineer next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
mobile-engineerQuBiit0/lmagent	Skill	2	8mo ago	MIT	A	39	Claude Code
orca-emulator-androidstablyai/orca	Skill	117k	today	MIT	A	102	Claude Code, Codex
glance-canonical-layoutsandroid/skills	Skill	10k	yesterday	Apache-2.0	A	56	Claude Code
android-tombstone-symbolicationdotnet/skills	Skill	5.8k	yesterday	MIT	A	176	Claude Code
dogfoodcallstack/agent-device	Skill	5.3k	yesterday	MIT	A	55	Claude Code
winapp-mauimicrosoft/winappCli	Skill	1.4k	today	MIT	A	68	Claude Code
app_remixrome-os/rome	Skill	889	today	MIT	A	50	Claude Code, Codex

lmagent: Skill for Claude Code