The latest articles on DEV Community by Seong Il Gang (@ait426). https://dev.to/ait426 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%2F3858840%2F1fe373f4-2619-42cc-8575-b31392d58d03.png https://dev.to/ait426 en Seong Il Gang Fri, 03 Apr 2026 06:11:17 +0000 https://dev.to/ait426/i-built-a-self-evolving-ai-skill-engine-as-a-solo-dev-using-4-ai-models-23c8 https://dev.to/ait426/i-built-a-self-evolving-ai-skill-engine-as-a-solo-dev-using-4-ai-models-23c8 <h2> What is Cambrian? </h2> <p>An AI skill engine where skills get better the more you use them.</p> <p>Every AI tool runs the same prompts forever. Cambrian is different:</p> <ul> <li>Give feedback → LLM mutates the skill</li> <li>3-trial benchmark → LLM Judge blind-scores A/B</li> <li>Better version survives, worse one dies</li> <li>After 10 rounds, the skill is personalized to YOUR workflow</li> </ul> <h2> How I built it </h2> <p>Solo Korean developer. 4 AI models in relay:</p> <ul> <li> <strong>Claude Opus</strong> → architecture &amp; critical thinking (40 rounds of self-critique)</li> <li> <strong>GPT</strong> → code generation</li> <li> <strong>Claude Sonnet</strong> → implementation &amp; debugging</li> <li> <strong>Gemini</strong> → review</li> </ul> <p>The project itself was evolved through its own philosophy:<br> feedback → improve → test → repeat.</p> <h2> Key features </h2> <ul> <li> <strong>3-channel feedback</strong>: auto (failure analysis), critic (proactive review), manual</li> <li> <strong>LLM Judge</strong>: blind A/B scoring (0-10) with reasoning</li> <li> <strong>Competitive execution</strong>: same domain, best skill wins</li> <li> <strong>Multi-provider</strong>: Claude, GPT, Gemini — not locked to one platform</li> <li> <strong>Skill decay</strong>: 30 days unused → dormant, 90 days → fossil</li> <li> <strong>Export/import</strong>: portable .cambrian packages</li> </ul> <h2> Numbers </h2> <ul> <li>180 tests, 0 failures</li> <li>14 seed skills</li> <li>16 CLI commands</li> <li>3 LLM providers</li> </ul> <h2> Try it </h2> <div class="highlight js-code-highlight"> <pre class="highlight shell"><code>pip <span class="nb">install </span>git+https://github.com/Ait426/cambrian.git cambrian init <span class="nt">--dir</span> ./my_project cambrian skills </code></pre> </div> <p>GitHub: <a href="https://github.com/Ait426/cambrian" rel="noopener noreferrer">https://github.com/Ait426/cambrian</a></p> <p>What would you break first?</p> ai python opensource productivity