A workflow for diagnosing and fixing Expo application build failures. Expo is a framework for building React Native apps, and the workflow covers cloud builds, local setup, iOS, Android, Metro, and configuration plugins.

Use it to investigate EAS Build failures, Expo prebuild errors, CocoaPods or Xcode issues, Gradle or Android errors, Metro bundler failures, and config-plugin problems.

It helps identify where a build breaks, classify the failure, apply a targeted fix, and verify the result. This avoids treating every build error as the same problem.

How JubaKitiashvili/everything-react-native-expo configures Claude Cod

Reuse

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.

Copy the file

curl -O https://raw.githubusercontent.com/JubaKitiashvili/everything-react-native-expo/main/.claude/skills/build-fix/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/JubaKitiashvili/everything-react-native-expo

Made for: Claude Code.

Or install erne-universal, the plugin that ships this one along with the rest of its 45 skills, 12 agents.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/jubakitiashvili/everything-react-native-expo/build-fix/github.svg)](https://agentmods.dev/skills/jubakitiashvili/everything-react-native-expo/build-fix)

Your own site

<a href="https://agentmods.dev/skills/jubakitiashvili/everything-react-native-expo/build-fix"><img src="https://agentmods.dev/badge/skills/jubakitiashvili/everything-react-native-expo/build-fix/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/jubakitiashvili/everything-react-native-expo/build-fix"><img src="https://agentmods.dev/badge/skills/jubakitiashvili/everything-react-native-expo/build-fix.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 17 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 410 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.

Model	Per session	Once invoked
Fable 5.1	$0.00017	$0.00410
Opus 5	$0.00009	$0.00205
Sonnet 5	$0.00003	$0.00082
Haiku 4.5	$0.00002	$0.00041

Measured 11d ago against content hash 0fffdd70cbb8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

build-fix 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 11d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

erne-build-fix — 86% identical, 8 lines differ

.claude/skills/build-fix/SKILL.md · 58 lines

What it actually says

/build-fix — Fix Build Failures

You are executing the /build-fix command. Use the expo-config-resolver agent to diagnose and fix build errors.

Diagnostic Process

Identify the error — Read build logs, identify the failure point
Classify the error type:
- EAS Build failure (cloud build)
- Local expo prebuild failure
- iOS build failure (CocoaPods, Xcode, provisioning)
- Android build failure (Gradle, ProGuard, multidex)
- Metro bundler error
- Config plugin error
Diagnose root cause — Check common causes per error type
Apply fix — Make targeted changes
Verify — Rebuild and confirm fix

Common Fixes

EAS Build

Validate eas.json build profiles
Check app.json / app.config.ts for typos
Verify Expo SDK compatibility with dependencies
Check EAS Build logs for native compilation errors

iOS

pod install issues → delete Podfile.lock + pod install --repo-update
Provisioning → verify Apple Developer account + certificates
Privacy manifest → add PrivacyInfo.xcprivacy declarations
Module not found → check header search paths

Android

Gradle sync → check minSdkVersion alignment
ProGuard → add keep rules for broken classes
Multidex → enable in build.gradle
NDK → verify Hermes / JSC compatibility

Output Format

## Error Analysis
[Error message and classification]

## Root Cause
[Why the build failed]

## Fix Applied
[Changes made with file paths]

## Verification
[Build command to run, expected result]

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.

11d ago First seen · 58 lines · 17 tokens per session scan A 0fffdd70cbb8

Subscribe to this mod's changes

build-fix is a skill published in the GitHub repository JubaKitiashvili/everything-react-native-expo (45 stars, last pushed 5mo ago), licensed MIT. It adds 17 tokens to every session and 410 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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everything-react-native-expo: Skill for Claude Code