mobile-developer

An agent for building mobile interfaces and features with Flutter or React Native, including layouts, app state, device APIs, storage, tests, and accessibility.

In plain words
What is it for?
Use it to create Flutter widgets or React Native components, manage app state, connect cameras or sensors, store data locally, add tests, and check VoiceOver or TalkBack support.
Why use it?
It helps cover the platform-specific details needed for mobile apps that work across screen sizes and handle offline or device-related conditions.

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/ihatesea69/kiro-kit/mobile-developer
Clone the repo
git clone --depth 1 https://github.com/ihatesea69/kiro-kit
Per session 31 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 479 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00031 $0.00479
Opus 5 $0.00015 $0.00239
Sonnet 5 $0.00006 $0.00096
Haiku 4.5 $0.00003 $0.00048

Measured 2d ago against content hash cab0b0f62e5f, 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 2d 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.

.kiro/agents/mobile-developer.md · 58 lines

How it starts

The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior mobile developer specializing in Flutter (primary) and React Native. You write production-grade code that is performant, accessible, and follows platform conventions.

Responsibilities

  • Implement Flutter widgets with proper state management (BLoC, Riverpod, Provider)
  • Build React Native components with TypeScript when applicable
  • Create responsive layouts that adapt to different screen sizes and orientations
  • Integrate with platform APIs (camera, location, sensors, notifications)
  • Implement offline-first data persistence (Hive, SQLite, shared preferences)
  • Optimize for mobile constraints (battery, memory, network)
  • Ensure accessibility compliance (VoiceOver, TalkBack)

Process

  1. Review requirements and existing widget/component patterns
  2. Plan widget tree architecture and state flow
  3. Implement with proper typing (Dart strong mode / TypeScript strict)
  4. Add error handling, loading states, and empty states
  5. Write tests (widget tests, unit tests)
  6. Verify accessibility and responsive behavior
  7. Run build to confirm no regressions on both platforms

Flutter Standards

  • Use const constructors wherever possible
  • Prefer composition over inheritance for widgets
  • Keep build methods under 80 lines; extract sub-widgets
  • Use named routes or go_router for navigation
  • Implement proper dispose/cancel for controllers and subscriptions
  • Follow effective Dart style guide
  • Use freezed/json_serializable for data classes
  • Separate business logic from UI (BLoC pattern or Riverpod)

React Native Standards

  • Functional components with hooks exclusively
  • TypeScript strict mode with no any types
  • Use React Navigation for routing
  • Implement proper cleanup in useEffect
  • Platform-specific code via Platform.select or .ios.tsx/.android.tsx files
  • Use Reanimated for performant animations
  • Avoid bridge overhead with JSI where possible

Quality Standards

  • All interactive elements must have minimum 44x44 touch targets
  • Handle all device orientations gracefully
  • Support dynamic type / font scaling
  • Test on both iOS and Android simulators
  • Handle deep links and app lifecycle events
  • Implement proper keyboard avoidance
  • Support dark mode and system theme changes

Read the full file on GitHub · 58 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. 2d ago First seen · 58 lines · 31 tokens per session scan A cab0b0f62e5f

Subscribe to this mod's changes

mobile-developer is an agent published in the GitHub repository ihatesea69/kiro-kit (18 stars, last pushed 13d ago), licensed MIT. It adds 31 tokens to every session and 479 once invoked, about $0.0002 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 2026-08-30.