Claude Code Error Handling Hub (2026)

Systematic error handling patterns for Claude Code projects. From Express middleware to Prisma transactions, these guides cover the error handling strategies that keep production systems stable.

Why Error Handling Is Critical in AI-Assisted Development

When Claude Code generates application code, error handling is often the first thing that gets skipped or simplified. AI models tend to focus on the happy path and produce code that works when everything goes right. Production systems need code that handles every failure mode gracefully: network timeouts, malformed input, database constraint violations, rate limits, and partial failures in distributed workflows.

The guides in this hub address the most common error handling gaps in Claude Code generated output. Each guide provides before-and-after examples showing the difference between naive error handling and production-grade patterns. You will find specific CLAUDE.md instructions that tell Claude Code to include proper error boundaries, retry logic, and structured error responses in every piece of generated code.

These patterns cover the full backend stack. Express middleware error handling catches unhandled exceptions and returns consistent error responses. Prisma transaction error handling rolls back partial writes and surfaces database constraint violations clearly. API retry patterns use exponential backoff with jitter to handle transient failures without overwhelming upstream services. Form validation error handling gives users clear feedback without leaking internal details. Start with the guide that matches your primary framework, then work through the others to build a complete error handling strategy.

All Error Handling Guides

How to Use This Hub

If you are building a Node.js backend, start with the Express middleware error handling guide and the Prisma transaction patterns. For API consumers, the Claude API 529 overloaded error guide and the timeout retry guide address the most common failures when calling the Anthropic API at scale. If Claude Code is generating code that silently ignores errors, the “Claude Code Skips Error Handling” guides explain how to configure your CLAUDE.md to enforce error handling in every generated function. The retry loop tax guide is essential reading for anyone building agent loops, as poorly implemented retries can multiply your token costs by ten times or more without producing better results.