Borrowing it
Nothing to install: this file belongs to JubaKitiashvili/everything-react-native-expo. 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/JubaKitiashvili/everything-react-native-expo/main/.cursorrulesgit clone --depth 1 https://github.com/JubaKitiashvili/everything-react-native-expoWrote 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/rules/jubakitiashvili/everything-react-native-expo/cursorrules)<a href="https://agentmods.dev/rules/jubakitiashvili/everything-react-native-expo/cursorrules"><img src="https://agentmods.dev/badge/rules/jubakitiashvili/everything-react-native-expo/cursorrules/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.
<a href="https://agentmods.dev/rules/jubakitiashvili/everything-react-native-expo/cursorrules"><img src="https://agentmods.dev/badge/rules/jubakitiashvili/everything-react-native-expo/cursorrules.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00483 | $0.00483 |
| Opus 5.5 | $0.00193 | $0.00193 |
| Sonnet 5.5 | $0.00097 | $0.00097 |
| Haiku 4.5 | $0.00048 | $0.00048 |
Grade A, and why
cursorrules 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- windsurfrules — 100% identical, 0 lines differ
What it actually says
You are an expert React Native and Expo developer working in an ERNE-powered project.
Stack
- TypeScript (strict), React Native, Expo (managed or bare)
- Expo Router (file-based navigation)
- Zustand (client state) + TanStack Query (server state)
- Jest + React Native Testing Library + Detox
Code Style
- Functional components only:
const Component = () => {} - Named exports only, no default exports
- PascalCase for components/types, camelCase for functions/hooks
- Import order: react → react-native → expo → third-party → internal → types
- Max 250 lines per component — extract if larger
StyleSheet.create()always — never inline styles
Performance
React.memo,useMemo,useCallbackwhere measurableFlashListoverFlatListfor 100+ item lists- No anonymous functions in JSX render props
- Images: WebP, explicit dimensions, caching
- Animations:
react-native-reanimated(UI thread) - JS bundle under 1.5MB
Testing
- Every component/hook gets a test file
- Test user behavior, not implementation details
- Mock native modules in
__mocks__/ - Detox for E2E critical paths
Security
- Never hardcode secrets — use env vars
- Validate all deep link parameters
- SSL pinning for sensitive APIs
- Use secure storage for tokens (expo-secure-store, react-native-keychain, etc.)
State Management
- Zustand: UI state, preferences, navigation state
- TanStack Query: API data, caching, refetching
- Never mix concerns between the two
Expo
- Prefer Expo SDK modules over community packages
app.config.tsfor dynamic config- Config plugins for native customization
- EAS Build for CI/CD, EAS Update for OTA
Navigation
- File-based routing with Expo Router
- Typed routes via
expo-router/typed-routes _layout.tsxfor shared UI (headers, tabs)- Validate deep link params before navigating
Git
- Conventional Commits: feat:, fix:, refactor:, test:, docs:, chore:
- Branch naming: feat/, fix/, refactor/ prefix
- One logical change per commit
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.
- 2d ago First seen · 58 lines · 483 tokens per session scan A ba1661ccfa90
cursorrules is a cursor rule published in the GitHub repository JubaKitiashvili/everything-react-native-expo (48 stars, last pushed 2d ago), licensed MIT. It adds 483 tokens to every session, about $0.0019 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 2026-10-09.
Other cursor rules, from other repositories
react-chakra-ui-cursorrules-prompt-file
Cursor rules for React development with Chakra UI integration.
react-styled-components-cursorrules-prompt-file
Cursor rules for React development with Styled Components integration.
expo
Expo Router, NativeWind, and mobile conventions.
react-chakra-ui---folder-structure
A standard folder layout for React and Chakra UI projects, including separate locations for components, pages, themes, hooks, utilities, and assets. It also defines how Chakra UI theme files are grouped.
custom-component
Guide for creating React components using the useProps pattern with Mantine for centralized theme-based styling. Apply when creating or modifying components that need theme integration.
ui-design-system
UI, design tokens and mobile-first rules.