Making Claude check its own work with 3x'd my output quality : r/ClaudeCode

Claude Code quality improved when Claude was made to verify its own work before declaring a task done.
The workflow uses Chrome DevTools MCP to open the changed page and inspect it at mobile, tablet, and desktop widths.
Claude is told to look at the screenshots itself, identify what is wrong, then fix the issues and re-screenshot to confirm the fix.
Passing tests alone are not enough to prove a feature works in the browser, especially for visual or layout issues like overflow or broken responsive behavior.
The author says this self-check loop improved first-pass quality by roughly 3x and reduced the need for human QA.
The biggest cost of the approach is higher token usage because screenshots consume context, especially when checking three viewports and re-running after fixes.
The process is also slower and can push long sessions toward compaction sooner.
The author recommends using the loop mainly for UI-changing tasks rather than for every task.

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