AI.

The Complete MCP Guide: Architecture, Remote Call Flow, and Building Your Own Server

Understand MCP hosts, clients, servers, and primitives; trace a remote call end to end; then build, deploy, secure, and connect a Python MCP server to …

From Keyword Matching to Vector Retrieval: Three Ways to Search

A practical comparison of keyword matching, fuzzy search, vector retrieval, and RAG, with diagrams and classic application patterns.

KV Cache 深入理解：为什么只存 K/V，不存 Q

从 Transformer 自注意力、Prefill/Decode、缓存张量形状、显存公式到工程优化，系统讲清楚 KV Cache 的工作方式，以及为什么旧 Query 没有缓存价值。

How Token Counting Works: How AI Providers and API Proxies Track Usage

A practical explanation of tokenizers, context windows, input and output tokens, streaming usage, tool calls, multimodal billing, and how API proxy …

RAG Fully Explained:From "Closed-Book" to "Open-Book" LLMs