Tech Deep Dive
6 articles
How AI Coding Agents Actually Work: A Source Code Deep Dive
From LLM reasoning and tool calling to context window management and security models — a comprehensive look at the internals of AI coding agents, based on Amazon Q CLI and Claude Code source code.
OpenClaw vs Claude Code: How a Weekend Project With 310K Stars Is Reshaping AI Agents
A comprehensive analysis of OpenClaw and Claude Code — two AI agent products with radically different philosophies, architectures, and paths to adoption.
Source Code Deep Dive: OpenClaw vs Claude Code — Two Radically Different AI Agent Architectures
A source-code-level comparison of how OpenClaw (453K lines TypeScript) and Claude Code (28K lines Markdown) approach agent definition, plugin systems, multi-model support, and security.
Designing a Full-Site Search Engine with Elasticsearch: From Architecture to Implementation
A comprehensive guide to building enterprise search with Elasticsearch — covering multi-source indexing, binlog-based CDC sync, permission-aware retrieval, hot keyword ranking with time decay, and typeahead suggestions.
Building a Knowledge Base Search Engine with FSCrawler and Elasticsearch
How to use FSCrawler to index PDF, Word, Excel, and scanned documents into Elasticsearch — covering OCR setup, custom mappings, REST API integration, and production deployment.
Adding a Unique Index to a 15-Million-Row MySQL Table: A Production War Story
How we added a unique index to a live 15M-row table with duplicate data — the mistakes we made, the outage we caused, and the modern tools (pt-osc, gh-ost, online DDL) we should have used.