https://codestoa.com/ 2026-10-23 daily 1 https://codestoa.com/ai-engineering/ 2026-10-23 weekly 0.8 https://codestoa.com/system-design/ 2026-10-23 weekly 0.8 https://codestoa.com/ai-engineering/llm-eval-methods/ LLM Eval Methods: Code Checks, Human Review and LLM-as-Judge https://media.codestoa.com/ai-engineering/llm-eval-methods/poster.jpg?v=d1af116a Learn the three LLM eval methods (code checks, LLM-as-judge and human review), when to use each, their limits and how real eval suites layer them. https://media.codestoa.com/ai-engineering/llm-eval-methods/long.mp4?v=cf062a9f 2026-10-23 monthly 0.7 https://codestoa.com/ai-engineering/llm-evals-introduction/ LLM Evals: Why "It Looks Good" Isn't Enough https://media.codestoa.com/ai-engineering/llm-evals-introduction/poster.jpg?v=08ae50ad What LLM evals are, why a few manual prompts aren't testing, and the seven-step workflow engineers use to measure AI apps before users find the failures. https://media.codestoa.com/ai-engineering/llm-evals-introduction/long.mp4?v=024d9c4f 2026-10-19 monthly 0.7 https://codestoa.com/ai-engineering/llm-evaluation-criteria/ LLM Evaluation Criteria: Quality, Safety and Operational Metrics https://media.codestoa.com/ai-engineering/llm-evaluation-criteria/poster.jpg?v=a7cec4ce Learn which LLM evaluation criteria to measure: answer quality, safety and operational metrics, told through one support bot, plus a runnable report card. https://media.codestoa.com/ai-engineering/llm-evaluation-criteria/long.mp4?v=0b22fdff 2026-10-22 monthly 0.7 https://codestoa.com/ai-engineering/llm-failure-points/ Failure Points in LLM Applications: Where RAG Apps Break https://media.codestoa.com/ai-engineering/llm-failure-points/poster.jpg?v=4360cde6 Follow one question through a RAG chatbot to see where LLM apps fail: retriever, generator, workflow and application, and why one eval pipeline isn't enough. https://media.codestoa.com/ai-engineering/llm-failure-points/long.mp4?v=04d99da6 2026-10-22 monthly 0.7 https://codestoa.com/system-design/back-of-the-envelope-estimation/ Back-of-the-Envelope Estimation for System Design https://media.codestoa.com/system-design/back-of-the-envelope-estimation/poster.jpg?v=ce359700 Learn back-of-the-envelope estimation: work out requests per second, peak load, storage and bandwidth with round numbers, and let them decide your design. https://media.codestoa.com/system-design/back-of-the-envelope-estimation/long.mp4?v=a3cb3b26 2026-10-23 monthly 0.7 https://codestoa.com/system-design/how-to-approach-system-design/ How to Approach a System Design Problem, Step by Step https://media.codestoa.com/system-design/how-to-approach-system-design/poster.jpg?v=2f43e71d A five-step way to approach any system design problem or interview: clarify requirements, estimate, sketch the design, deep dive, then trade-offs. https://media.codestoa.com/system-design/how-to-approach-system-design/long.mp4?v=3192d77e 2026-10-23 monthly 0.7 https://codestoa.com/system-design/what-is-system-design/ What Is System Design? The Parts, the Promises and the Trade-offs https://media.codestoa.com/system-design/what-is-system-design/poster.jpg?v=473a2360 What system design is, in plain words: the parts of a system, how they connect, the promises it keeps under load, and why every design is a trade-off. https://media.codestoa.com/system-design/what-is-system-design/long.mp4?v=221aa10d 2026-10-23 monthly 0.7 https://codestoa.com/about/ yearly 0.3 https://codestoa.com/privacy/ yearly 0.1