Blog
#AI-Driven Development
17 post(s)
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Claude Prompt Mastery — complete guide index across 9 posts
Wrapping up a nine-day series on Claude prompting. Built on the Anthropic official docs, the series covers three core principles, a workflow, and 42 ready-to-paste patterns. This index shows which post to read depending on what you're trying to accomplish.
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Claude for life, not just work — 18 patterns for writing, career, emotions, and daily tasks
Claude is powerful in non-technical domains too. Here are 18 ready-to-paste prompt patterns for writing, career decisions, emotional support, and everyday tasks — with a developer's real-life examples of each.
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Claude isn't 'just a coding AI' — 13 prompt patterns for research, learning, and decisions
Claude is a powerful partner for research, learning, and decision-making, not only coding. Here are 13 ready-to-paste patterns I use to accelerate my thinking, with personal examples from development and everyday work.
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Claude Code-only features — Skills, Subagents, Hooks, Plan Mode explained
Claude Code has features the Web and API versions don't. This post organizes the most important ones — Skills, Subagents, Hooks, Plan Mode, Auto Mode — and shows how I combine them in my personal projects.
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Writing instructions Claude gets right on the first try — CLAUDE.md, motivation, XML, few-shot
Are you repeating the same instructions to Claude every session? Anthropic's prompt engineering guide highlights five techniques that raise prompt quality across the board: CLAUDE.md, stating motivation, XML structuring, few-shot examples, and document ordering.
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Delegate development to Claude — 11 copy-paste prompt patterns for coding, review, and debugging
When you hand off development tasks to Claude, what kinds of prompts reliably produce high-quality code? Here are 11 battle-tested patterns I use daily for implementation, review, debugging, refactoring, test generation, and more.
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Never let Claude jump straight into code — the Explore → Plan → Code → Commit workflow
The Claude Code official best practices recommend a four-stage workflow: Explore, Plan, Code, Commit. Here's why skipping Plan Mode produces 'correct solutions to the wrong problem', and how the discipline has saved me hours in practice.
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Treat Claude like a brilliant new intern — the three principles Anthropic prioritizes
Anthropic's official prompt engineering guide distills everything down to three principles: the Golden Rule, context-window management, and always providing a way for Claude to verify its own work. Here is what those principles look like in daily practice.
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The Claude Code prompt playbook was hiding in the official docs — kicking off a new series
Starting a series built on Anthropic's Claude Code best practices and the Claude 4 prompt engineering guide. Here's the overview and a quick look at how reading the official docs concretely changed my day-to-day development.
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AI That Implements Without Hesitation — How to Write a 20-Section, 3,500-Line Design Doc
Publishing the structure of the design doc that reduced 16 person-days to 2 hours in AI-driven development. The roles and priorities of 20 sections, and the 'must-write' points for each.
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16 Person-Days of Development Done in 2 Hours — Design Doc Completeness Determines Speed
In a personal project, AI-driven development completed 16 person-days of work in 2 hours. The biggest factor wasn't AI speed — it was the completeness of the design document that eliminated all decision-making.
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Qiita CLI × Claude Code — Automating Article Management with Trend Analysis, SEO, and Scheduled Publishing
I built a system combining Qiita CLI, Claude Code, and GitHub Actions to manage articles entirely in Git. This covers the full journey including a duplicate article ID trap and data-driven publishing time optimization.
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Get to Know Teppei Suyama in 5 Minutes — A Guide to This Site
A navigation map for first-time visitors to quickly understand who Teppei Suyama is — career, dreams, philosophy, side projects, and the shortest routes to each section of this homepage.
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"The Testing Phase Disappeared" — AI-Driven vs Traditional Development Compared
A developer with zero Flutter experience used Claude Code to ship a production app in 3 weeks. This article compares every phase — from planning to testing — with real data showing 6-9x faster delivery and 6x higher test density.
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From "YumeLog" to "YumeHashi" — Building a Bridge Between Dreams and Reality
The story behind renaming my personal app from YumeLog to YumeHashi, the 3-step design philosophy (write, break down, keep going) for turning dreams into action, and why I keep building despite zero revenue.
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YumeHashi's Tech Stack and 5 Implementation Challenges Solved by v2.1.0
A deep dive into the serverless architecture (Flutter Web + Drift + Riverpod + Firebase) behind YumeHashi, a side project running at zero monthly cost, and 5 real implementation challenges solved with code.
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I Launched My Homepage — Consolidating Scattered Information into One Place
I built a personal homepage with Astro v6, GitHub Pages, and AI-driven development. Here's why I consolidated my career, skills, products, and blog into a single site, and what I hope to achieve.