The latest articles on DEV Community by 백승준 (@_c354662633fa663d7fee7). https://dev.to/_c354662633fa663d7fee7 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3859377%2Fb73d142d-14a5-4d64-bf1a-8d4cc46a5762.png https://dev.to/_c354662633fa663d7fee7 en 백승준 Fri, 03 Apr 2026 11:37:54 +0000 https://dev.to/_c354662633fa663d7fee7/i-built-an-ai-that-fixes-legacy-code-automatically-not-just-suggestions-ic6 https://dev.to/_c354662633fa663d7fee7/i-built-an-ai-that-fixes-legacy-code-automatically-not-just-suggestions-ic6 <p>Dealing with legacy code is painful.</p> <p>You fix one thing, and something else breaks.<br> Small changes often require understanding a large, messy codebase.</p> <p>I ran into this problem repeatedly, so I built something to help.</p> <h2> What I built </h2> <p>I built EIDOS, an AI tool that fixes messy legacy code automatically.</p> <p>Most AI coding tools just suggest changes.</p> <p>EIDOS takes a different approach:<br> it actually edits your real files and iterates on them until the issue is resolved.</p> <h2> What it can do </h2> <ul> <li>Fix bugs (e.g., SQL injection, type errors)</li> <li>Refactor messy code into a cleaner structure</li> <li>Add features directly into existing code</li> <li>Generate docs and basic tests</li> </ul> <p>The goal is not just suggestions, but actually modifying real code.</p> <h2> Demo </h2> <p>Here’s a quick demo:<br> <a href="https://kaausia45-jpg.github.io/page/" rel="noopener noreferrer">https://kaausia45-jpg.github.io/page/</a></p> <h2> Why I built this </h2> <p>I got tired of dealing with legacy systems where even small fixes felt expensive and risky.</p> <p>I wanted something that could take over the repetitive and painful parts.</p> <h2> Looking for feedback </h2> <p>This is still early, and I'm exploring how far this approach can go.</p> <p>If you've dealt with messy codebases:</p> <ul> <li>How do you usually handle them?</li> <li>Do you rely on tools, or mostly refactor manually?</li> </ul> <p>Would love to hear your thoughts.</p> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fje1kj68fqjlo49sot7og.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fje1kj68fqjlo49sot7og.png" alt=" " width="800" height="433"></a><br> <a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fr45fhb5jmobq9kcoile1.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fr45fhb5jmobq9kcoile1.png" alt=" " width="800" height="433"></a></p> ai webdev programming startup