Backend tech guide and AI engineering practice covering fundamentals, databases, distributed systems, high concurrency, system design, plus AI agents and large-model engineering.
The author recounts how using Codex to analyze JavaGuide's performance triggered a site-wide outage, then details the step‑by‑step investigation—from cache misconfigurations and hashed asset handling to a VuePress hydration bug—and shares practical lessons on combining AI assistance with disciplined engineering practices.
The article examines the pitfalls of "Vibe Coding"—quick AI‑generated code that skips testing and security—introduces the disciplined "Spec Coding" approach, and details how Addy Osmani’s open‑source agent‑skills project adds engineering rigor to AI coding through reusable skills, slash commands, and multi‑agent reviews.
The article reviews iFlytek’s Coding Plan, highlighting its three pricing tiers—including a 3.9 CNY entry tier that unlocks GLM‑5.1 for Claude Code—explains how request‑based billing reduces token anxiety, and provides step‑by‑step integration guides for Claude Code, OpenClaw and Cursor along with real‑world skill examples.
The article walks through using Step Plan’s unified API to integrate Claude Code for automated code review and to build a voice‑agent pipeline that transcribes meeting recordings, generates structured summaries, and produces audio briefs, while discussing setup, costs, model selection, practical demos, and observed limitations.
The article compares DeepSeek V4 and GLM‑5.1 AI coding models by analyzing their pricing structures, cache‑hit mechanisms, real‑world billing data, and suitability for different coding workloads, ultimately offering guidance on when each model provides the most cost‑effective solution.
DeepSeek V4’s pricing fell 75% overnight, making the V4‑Pro and V4‑Flash models dramatically cheaper than competing AI services; the article details the new rates, compares them with other providers, shows two Claude Code case studies consuming nearly 4 million tokens, and explains how domestic Ascend 950 hardware enables the discount.
This article introduces CC GUI, an open‑source JetBrains plugin that adds a visual workspace for Claude Code and OpenAI Codex, walks through installation, configuration, and usage steps, compares it with the Qoder plugin, and shows how to automate code reviews inside IDEA.
The article analyzes the rise of AI‑driven CLI tools like Claude Code versus traditional AI‑enhanced IDEs, compares their workflows, strengths, and limitations, and explains how mixed usage and emerging trends are reshaping the future of AI‑assisted software development.
The article explains how industrial‑grade AI agents require structured prompt engineering, chain‑of‑thought reasoning, task decomposition, and a three‑layer defense (sandbox, prompt isolation, and human approval) to prevent prompt‑injection attacks, while also covering context engineering, retrieval‑augmented generation, and tool design best practices.
The article walks through the evolution of sensitive‑word filtering—from naïve brute‑force scanning to Trie, Aho‑Corasick automaton, Double‑Array Trie, and DFA implementations—detailing their algorithms, time/space complexities, concrete Java code examples, performance trade‑offs, high‑concurrency optimizations, and practical production advice for building a robust content‑moderation system.
