Common Bugs in Manus-Generated Code

Autonomous agents optimize for task completion and may take shortcuts that work in the moment but create technical debt or subtle bugs. Error recovery during autonomous execution can produce code that's inconsistent with itself

Manus completes tasks autonomously, which means errors may be silently worked around rather than surfaced — it may choose a different approach when the first one fails, leaving code in a partially complete or inconsistent state. Generated code may work for the specific case it was tested on but break on variations that Manus didn't encounter during its autonomous execution

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 Manus 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 — Manus 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 Manus 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.