The 1-day-thrown-away rule: read the code before letting your AI write new code
The article describes an incident where an AI agent generated redundant code because it failed to recognize existing functionality in a codebase. The author emphasizes the importance of reviewing existing code before creating new solutions, calling this essential step 'Phase 0'. Skipping this step led to a full day of work being discarded, highlighting the cost of overlooking simple verification processes.
- ▪An AI agent generated a duplicate component because it did not review existing code in the repository.
- ▪The author identifies a 'Phase 0' step—spending two minutes searching for existing patterns—as a critical prerequisite before writing new code.
- ▪Failing to perform this basic check resulted in a full day's work being thrown away due to redundant and unnecessary code.
- ▪The existing solution was located nearby in the codebase and had a clear, descriptive file name.
- ▪The incident underscores that the responsibility for code duplication lies with the human developer, not the AI agent, when proper review steps are skipped.
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3897818) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Michel Faure Posted on May 17 • Originally published at dev.to The 1-day-thrown-away rule: read the code before letting your AI write new code #ai #agentic #codequality #productivity My ERP with Claude Code (25 Part Series) 1 How much are 91,000 lines produced with Claude Code actually worth? 2 Supabase RLS in production: four traps that silence your queries ... 21 more parts...
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