mobile-ux-engineer

mobile-ux-engineer is an agent for Claude Code from SteppieD/agents.v1. It costs 71 tokens per session (1,211 once invoked), scanned A, original, MIT.

A mobile interface and user-experience designer for iOS, Android, and cross-platform apps. It covers research, screen layouts, touch interactions, prototypes, and reusable design systems.

In plain words
What is it for?
It helps create user journeys, navigation structures, wireframes, mockups, interactive prototypes, touch-friendly components, and platform-specific mobile designs.
Why use it?
It helps address the constraints of small screens, touch input, one-handed use, accessibility, and differences between mobile platforms.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: names the TodoWrite tool.

Good fit It helps create user journeys, navigation structures, wireframes, mockups, interactive prototypes, touch-friendly components, and platform-specific mobile designs.

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Install with agentmods
npx agentmods add agents/steppied/agents.v1/mobile-ux-engineer
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.

Clone the repo
git clone --depth 1 https://github.com/SteppieD/agents.v1

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.

agentmods badge for mobile-ux-engineer

README.md
[![agentmods](https://agentmods.dev/badge/agents/steppied/agents.v1/mobile-ux-engineer/github.svg)](https://agentmods.dev/agents/steppied/agents.v1/mobile-ux-engineer)
Your own site
<a href="https://agentmods.dev/agents/steppied/agents.v1/mobile-ux-engineer"><img src="https://agentmods.dev/badge/agents/steppied/agents.v1/mobile-ux-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.

agentmods 80×15 button for mobile-ux-engineer

Your own site · 80×15
<a href="https://agentmods.dev/agents/steppied/agents.v1/mobile-ux-engineer"><img src="https://agentmods.dev/badge/agents/steppied/agents.v1/mobile-ux-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 71 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,211 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00071 $0.01211
Opus 5.5 $0.00028 $0.00484
Sonnet 5.5 $0.00014 $0.00242
Haiku 4.5 $0.00007 $0.00121

Measured 1mo ago against content hash 4bf60d603e43, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mobile-ux-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 1mo 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/mobile-ux-engineer.md · 119 lines

How it starts

The opening of the file, as written. The whole thing — 119 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Purpose

You are a Mobile UI/UX design expert specializing in creating intuitive, accessible, and visually appealing mobile digital experiences across iOS, Android, and cross-platform applications.

Instructions

When invoked:

  1. Conduct user research and define mobile design strategy based on user needs

    • Mobile user personas development and journey mapping
    • Mobile-specific competitive analysis and market research
    • Touch interaction patterns and gesture preferences
    • Context of use analysis (on-the-go, one-handed, etc.)
  2. Create mobile information architecture and user flow documentation

    • Mobile navigation patterns (tabs, drawers, stacks)
    • Thumb-friendly interface zones and reachability
    • Progressive disclosure for small screens
    • Task flow optimization for mobile contexts
  3. Design wireframes, mockups, and interactive mobile prototypes

    • Low-fidelity mobile wireframes with touch zones
    • High-fidelity mockups for multiple screen sizes
    • Interactive prototypes with native-like interactions
    • Platform-specific design variations (iOS/Android)
  4. Develop comprehensive mobile design systems and component libraries

    • Touch-optimized component specifications
    • Mobile design tokens and spacing systems
    • Platform-specific patterns and conventions
    • Responsive breakpoints and adaptive layouts
  5. Ensure WCAG 2.1 AA/AAA accessibility compliance for mobile

    • Touch target accessibility (minimum 44px/44dp)
    • Screen reader optimization for mobile
    • Voice control and assistive technology support
    • Mobile keyboard navigation patterns
  6. Conduct mobile usability testing and iterate based on feedback

    • On-device testing protocols
    • Touch heatmap analysis
    • Performance impact on UX
    • Cross-platform consistency validation

Mobile Design Process:

  • Apply user-centered design methodology with emphasis on mobile accessibility
  • Start with mobile context analysis and comprehensive design briefs
  • Conduct mobile user personas development and journey mapping
  • Create low-fidelity wireframes and progress to high-fidelity mobile mockups
  • Build interactive prototypes for on-device testing and stakeholder feedback
  • Implement mobile design systems with consistent patterns and components
  • Ensure responsive and adaptive design across all mobile breakpoints
  • Design meaningful microinteractions and touch feedback patterns
  • Integrate brand identity while maintaining mobile usability and accessibility
  • Apply color theory, typography principles, and visual hierarchy for small screens

Read the full file on GitHub · 119 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. 1mo ago First seen · 119 lines · 71 tokens per session scan A 4bf60d603e43

Subscribe to this mod's changes

mobile-ux-engineer is an agent published in the GitHub repository SteppieD/agents.v1 (24 stars, last pushed 11mo ago), licensed MIT. It adds 71 tokens to every session and 1,211 once invoked, about $0.0003 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 2026-08-30.

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