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/.claude/skills/erne-upgrade/SKILL.mdgit 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/skills/jubakitiashvili/everything-react-native-expo/erne-upgrade)<a href="https://agentmods.dev/skills/jubakitiashvili/everything-react-native-expo/erne-upgrade"><img src="https://agentmods.dev/badge/skills/jubakitiashvili/everything-react-native-expo/erne-upgrade/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/skills/jubakitiashvili/everything-react-native-expo/erne-upgrade"><img src="https://agentmods.dev/badge/skills/jubakitiashvili/everything-react-native-expo/erne-upgrade.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 | $0.00021 | $0.00488 |
| Opus 5 | $0.00010 | $0.00244 |
| Sonnet 5 | $0.00004 | $0.00098 |
| Haiku 4.5 | $0.00002 | $0.00049 |
Grade A, and why
erne-upgrade 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 12d 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.
What it actually says
/erne-upgrade — Version Migration
You are executing the /erne-upgrade command. Use the upgrade-assistant agent for guided version migration.
5-Step Upgrade Process
Step 1: Pre-Assessment
- Identify current versions (Expo SDK, React Native, key dependencies)
- Identify target versions
- Check release notes and breaking changes
- Backup current state (
git stashor commit)
Step 2: Dependency Compatibility Matrix
Generate a compatibility table:
| Package | Current | Target | Compatible? | Notes |
|---------|---------|--------|-------------|-------|
| expo | 51.0.0 | 52.0.0 | ✅ | Major upgrade |
| react-native | 0.74 | 0.76 | ✅ | Via Expo SDK |
| @react-navigation | 6.x | 7.x | ⚠️ | Breaking changes |
Step 3: Breaking Change Detection
- Scan codebase for deprecated APIs being used
- Identify removed features
- Check for changed behavior in dependencies
- Flag native module compatibility issues
Step 4: Migration Steps
Execute the upgrade:
Expo projects:
npx expo install expo@latest
npx expo install --fix # Fix peer dependency issues
npx expo prebuild --clean # Regenerate native projects
Bare RN projects:
npx react-native upgrade
# Or use upgrade-helper: https://react-native-community.github.io/upgrade-helper/
- Apply codemods when available
- Update deprecated API calls
- Fix TypeScript type changes
- Update config files
Step 5: Post-Upgrade Verification
- TypeScript compiles without errors
- ESLint passes
- All tests pass
- iOS build succeeds
- Android build succeeds
- Manual smoke test on both platforms
Output Format
## Upgrade Summary
From: [current versions]
To: [target versions]
## Breaking Changes Found
[List with file locations]
## Changes Applied
[Files modified with descriptions]
## Verification Checklist
[Status of each verification step]
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.
- 12d ago First seen · 79 lines · 21 tokens per session scan A 701c37907846
erne-upgrade is a skill published in the GitHub repository JubaKitiashvili/everything-react-native-expo (45 stars, last pushed 5mo ago), licensed MIT. It adds 21 tokens to every session and 488 once invoked, about $0.0001 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.
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