Common Bugs in Claude Code-Generated Code

Claude tends to build elegant, generalized solutions where a simpler specific approach would be less error-prone. Complex generic types and abstract patterns increase the surface area for subtle bugs

Claude Code handles the main flow well but edge cases in complex conditional logic can produce incorrect results. Over-abstracted code can have bugs hidden in generic utility functions that are hard to trace. Memory-heavy data processing fails with larger datasets than anticipated

Start by running your app through its complete user flow — sign up, use every feature, try edge cases like empty inputs and invalid data. Most Claude Code bugs surface when you go off the happy path. Use your browser's developer tools to watch for console errors, failed network requests, and unhandled promise rejections. TypeScript's strict mode will catch many issues at compile time if it's not already enabled.

For async errors, wrap every server-side operation in try/catch blocks and return meaningful error messages. For state bugs, consider whether the state belongs in the URL, in a server component, or in client state — Claude Code often defaults to client state when server state would be more appropriate. For data fetching issues, implement proper loading and error states for every data-dependent component.

The best way to prevent Claude Code bugs from reaching production: enable TypeScript strict mode, add ESLint rules for common mistakes (no-floating-promises, exhaustive-deps), and write tests for critical user flows. Even basic smoke tests catch the majority of issues.