Claude Codeの実践的プロンプトパターン15選 — 日常開発で使える型
Claude Codeを日常の開発業務で使い倒すための実践的なプロンプトパターンを15個紹介。バグ修正、リファクタリング、テスト生成、PR作成まで、なぜその書き方が効くのかも解説します。
AIの回答を80%が盲信する「認知的降伏」という問題
ペンシルベニア大学の1,372名実験で判明した、AIの誤出力でも80%が信頼してしまう現象。AI時代に必要な「検証する習慣」を考えます。
決定木とは？仕組み・長所短所・Pythonでの実装までわかりやすく解説
機械学習の基本アルゴリズム「決定木」について、仕組み・分割の考え方・長所と短所・scikit-learnを使った実装例・使いどころまでわかりやすくまとめました。
Depth over Breadth — AIは深く使え
月150万ドルのトークンを燃やすエンジニアが続出。MetaやMicrosoftが消費量をランキング化する一方、Shopify CTOは「深さで勝負しろ」と説く。AI活用の質を問い直す。
From Vibe Coding to Agentic Engineering — 5 Principles I Added to CLAUDE.md
Peter Steinberger calls vibe coding slang. After watching his 3-hour Lex Fridman interview, I extracted his agentic engineering principles and wired them into my CLAUDE.md the same day. Here's what I kept, what I skipped, and what paid off within hours.
7 Principles for AI Agent Tool Design — Lessons from Daily Production Use
Based on Anthropic and OpenAI's official guides and my own daily Claude Code experience: seven tool design principles that take an agent from 'works sometimes' to one you can genuinely trust.
Beyond RAG: How I Designed AI Memory with Obsidian and Claude Code
RAG alone doesn't give an AI long-term memory. After a year running Obsidian Vault alongside Claude Code's memory system, here's how the two-layer design actually works — and where it still falls short.
Using the Filesystem as a Database with Claude Code
Inspired by Satoshi Nakajima's MulmoClaude, I reconsidered how Claude Code handles files. Six months running a 4,000-file Obsidian Vault showed what works — and where the limits are.
Building an MCP Server from Scratch in TypeScript — Zero to Claude Code
A hands-on record of building an MCP server in TypeScript with SDK v1 and connecting it to Claude Code. Covers minimal setup, live verification logs, tool design decisions, and when to choose MCP over a plain CLI script.
I Built a Claude Code Slash Command to Clear 300 Unread Newsletters
A custom Claude Code slash command that fetches unread newsletters from Gmail, deep-reads each one individually, and saves a digest to Obsidian. Minimum setup and three weeks of usage data.