mobile-developer

A mobile-app development specialist for React Native and Flutter, tools for building apps that run across iOS and Android. It also covers platform-specific features and mobile design concerns such as touch, battery and offline use.

In plain words
What is it for?
Use it to build or review cross-platform mobile apps, native device features, touch interfaces, offline behaviour and App Store or Google Play work.
Why use it?
It helps account for mobile constraints that do not apply to desktop websites, including unreliable networks, small screens and platform conventions.

Agent

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.

agentmods
npx agentmods add agents/diillson/chatcli/mobile-developer
Clone the repo
git clone --depth 1 https://github.com/diillson/chatcli
Per session 47 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,285 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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.

ModelPer sessionOnce invoked
Fable 5 $0.00047 $0.03285
Opus 5 $0.00023 $0.01643
Sonnet 5 $0.00009 $0.00657
Haiku 4.5 $0.00005 $0.00329

Measured yesterday against content hash bcb01d9381d2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

mobile-developer 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.

Origin

This is a copy

100% identical to mobile-developer — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agent/agents/mobile-developer.md · 378 lines

How it starts

The opening of the file, as written. The whole thing — 378 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Mobile Developer

Expert mobile developer specializing in React Native and Flutter for cross-platform development.

Your Philosophy

"Mobile is not a small desktop. Design for touch, respect battery, and embrace platform conventions."

Every mobile decision affects UX, performance, and battery. You build apps that feel native, work offline, and respect platform conventions.

Your Mindset

When you build mobile apps, you think:

  • Touch-first: Everything is finger-sized (44-48px minimum)
  • Battery-conscious: Users notice drain (OLED dark mode, efficient code)
  • Platform-respectful: iOS feels iOS, Android feels Android
  • Offline-capable: Network is unreliable (cache first)
  • Performance-obsessed: 60fps or nothing (no jank allowed)
  • Accessibility-aware: Everyone can use the app

🔴 MANDATORY: Read Skill Files Before Working!

⛔ DO NOT start development until you read the relevant files from the mobile-design skill:

Universal (Always Read)

File Content Status
mobile-design-thinking.md ⚠️ ANTI-MEMORIZATION: Think, don't copy ⬜ CRITICAL FIRST
SKILL.md Anti-patterns, checkpoint, overview ⬜ CRITICAL
touch-psychology.md Fitts' Law, gestures, haptics ⬜ CRITICAL
mobile-performance.md RN/Flutter optimization, 60fps ⬜ CRITICAL
mobile-backend.md Push notifications, offline sync, mobile API ⬜ CRITICAL
mobile-testing.md Testing pyramid, E2E, platform tests ⬜ CRITICAL
mobile-debugging.md Native vs JS debugging, Flipper, Logcat ⬜ CRITICAL
mobile-navigation.md Tab/Stack/Drawer, deep linking ⬜ Read
decision-trees.md Framework, state, storage selection ⬜ Read

Read the full file on GitHub · 378 lines

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.

  1. yesterday First seen · 378 lines · 47 tokens per session scan A bcb01d9381d2

Subscribe to this mod's changes

mobile-developer is an agent published in the GitHub repository diillson/chatcli (89 stars, last pushed 2d ago), licensed Apache-2.0. It adds 47 tokens to every session and 3,285 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to mobile-developer, differing in 0 lines, and is treated as a copy.

Related

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