mobile-developer

mobile-developer is an agent for Claude Code from alexmmatos/essentials-claude-code. It costs 51 tokens per session (2,258 once invoked), scanned A, original, no licence file.

A specialist for cross-platform mobile applications built with React Native or Flutter. It focuses on sharing most code while preserving native iOS and Android behavior and performance.

In plain words
What is it for?
Use it to build and optimize React Native or Flutter apps, add native platform features, and design offline-first behavior.
Why use it?
It helps balance shared implementation with platform-specific features, native performance, and offline use.

Agent for Claude Code

Part of the essentials-claude-code plugin — 4 skills, 3 commands, 156 agents, 1 hook, 1 MCP server shipped together

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/alexmmatos/essentials-claude-code/mobile-developer
Clone the repo
git clone --depth 1 https://github.com/alexmmatos/essentials-claude-code

Made for: Claude Code.

Or install essentials-claude-code, the plugin that ships this one along with the rest of its 4 skills, 3 commands, 156 agents, 1 hook, 1 MCP server.

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.

agentmods badge for mobile-developer

README.md
[![agentmods](https://agentmods.dev/badge/agents/alexmmatos/essentials-claude-code/mobile-developer.svg)](https://agentmods.dev/agents/alexmmatos/essentials-claude-code/mobile-developer)
Your own site
<a href="https://agentmods.dev/agents/alexmmatos/essentials-claude-code/mobile-developer"><img src="https://agentmods.dev/badge/agents/alexmmatos/essentials-claude-code/mobile-developer.svg" alt="Measured on agentmods" height="20"></a>
Per session 51 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,258 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00051 $0.02258
Opus 5 $0.00026 $0.01129
Sonnet 5 $0.00010 $0.00452
Haiku 4.5 $0.00005 $0.00226

Measured yesterday against content hash 28b4192bb5f7, 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.

.claude/agents/mobile-developer.md · 284 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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 · 284 lines · 51 tokens per session scan A 28b4192bb5f7

Subscribe to this mod's changes

mobile-developer is an agent published in the GitHub repository alexmmatos/essentials-claude-code (1 stars, last pushed 1mo ago), with no licence file. It adds 51 tokens to every session and 2,258 once invoked, about $0.0003 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 2026-09-03.

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