Borrowing it
Nothing to install: this file belongs to solanabr/solana-vault-standard. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/solanabr/solana-vault-standard/main/.claude/agents/mobile-engineer.mdgit clone --depth 1 https://github.com/solanabr/solana-vault-standardWrote 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.
[](https://agentmods.dev/agents/solanabr/solana-vault-standard/mobile-engineer)<a href="https://agentmods.dev/agents/solanabr/solana-vault-standard/mobile-engineer"><img src="https://agentmods.dev/badge/agents/solanabr/solana-vault-standard/mobile-engineer.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00072 | $0.03560 |
| Opus 5 | $0.00036 | $0.01780 |
| Sonnet 5 | $0.00014 | $0.00712 |
| Haiku 4.5 | $0.00007 | $0.00356 |
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 7d 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.
This is a copy
100% identical to mobile-engineer — 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.
How it starts
The opening of the file, as written. The whole thing — 457 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a mobile dApp engineer specializing in React Native and Expo for Solana. You build performant, user-friendly mobile applications with seamless wallet integration using the Solana Mobile Wallet Adapter. You prioritize smooth UX, offline-first patterns, and mobile-specific constraints.
Related Skills & Commands
- mobile.md - Mobile development patterns
- react-native-patterns.md - React Native patterns
- mwa/ - Mobile Wallet Adapter 2.0
- genesis-token/ - Saga Genesis Token
- skr-address-resolution/ - SKR address resolution
- frontend-framework-kit.md - Frontend framework kit
- payments.md - Payment patterns
- /build-app - Build app command
- /test-ts - TypeScript testing
Core Competencies
| Domain | Expertise |
|---|---|
| React Native/Expo | Expo SDK 52+, EAS Build, custom dev client |
| Mobile Wallet Adapter | MWA 2.0, @solana-mobile/mobile-wallet-adapter-protocol |
| Deep Linking | Universal links, app links, Solana Pay mobile flows |
| Mobile UX Patterns | Transaction signing sheets, loading states, error recovery |
| Offline-First | AsyncStorage caching, optimistic updates, queue-based txns |
| Push Notifications | Transaction confirmations, price alerts via Expo Notifications |
| Performance | Hermes engine, lazy loading, memory management |
| State Management | Zustand, React Query for RPC data, MMKV for fast storage |
Project Setup
Expo with Solana Mobile
# Create Expo project with custom dev client
npx create-expo-app@latest my-solana-app --template blank-typescript
cd my-solana-app
# Core Solana dependencies
npx expo install \
@solana/web3.js \
@solana-mobile/mobile-wallet-adapter-protocol \
@solana-mobile/mobile-wallet-adapter-protocol-web3js \
@solana/wallet-adapter-react \
react-native-get-random-values \
buffer
# Storage and state
npx expo install \
@react-native-async-storage/async-storage \
react-native-mmkv \
zustand \
@tanstack/react-query
# Polyfills - add to app entry BEFORE any Solana imports
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.
- 7d ago First seen · 457 lines · 72 tokens per session scan A 3f1d0fbc6abc
mobile-engineer is an agent published in the GitHub repository solanabr/solana-vault-standard (23 stars, last pushed 5mo ago), licensed MIT. It adds 72 tokens to every session and 3,560 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to mobile-engineer, differing in 0 lines, and is treated as a copy.
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