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Yurukusa

Indie game studio: AI × human collaboration. Creator of Spell Cascade and Azure Flame Dungeon. Non-engineer shipping games, tools, and articles with Claude Code.

Location Japan Joined Joined on  Personal website https://yurukusa.itch.io
I Built Spotify Wrapped for Claude Code. Here's What 3,400 Sessions Look Like.

I Built Spotify Wrapped for Claude Code. Here's What 3,400 Sessions Look Like.

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3 min read

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I Analyzed 14 Real CLAUDE.md Files. Here's What Claude Code Users Actually Configure.

I Analyzed 14 Real CLAUDE.md Files. Here's What Claude Code Users Actually Configure.

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4 min read
I Can't Write Code. I Pay $200/Month for AI. My Life Is Now a Hardcore Game.

I Can't Write Code. I Pay $200/Month for AI. My Life Is Now a Hardcore Game.

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3 min read
I Tracked My Claude Code Usage. 50 Days Straight. My Hip Flexors Have Opinions.

I Tracked My Claude Code Usage. 50 Days Straight. My Hip Flexors Have Opinions.

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3 min read
I Discovered I'd Spent 116 Hours with Claude Code in 50 Days — So I Built a CLI to Track It

I Discovered I'd Spent 116 Hours with Claude Code in 50 Days — So I Built a CLI to Track It

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2 min read
Single Source of Truth: The Concept Non-Engineers Don't Know (But Should)

Single Source of Truth: The Concept Non-Engineers Don't Know (But Should)

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3 min read
We Entered an AI Game Jam. We Ended Up Submitting 3 Games.

We Entered an AI Game Jam. We Ended Up Submitting 3 Games.

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8 min read
I Built a Health Check CLI for Claude Code. My Setup Scored 63 on the First Run.

I Built a Health Check CLI for Claude Code. My Setup Scored 63 on the First Run.

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3 min read
My AI Agent Designed a Game Synergy. Here's the Design Reasoning It Used.

My AI Agent Designed a Game Synergy. Here's the Design Reasoning It Used.

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3 min read
AI Strategy vs Human Intuition: A Bug-Finding Showdown

AI Strategy vs Human Intuition: A Bug-Finding Showdown

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9 min read
The Token-Per-Dollar Math: Running Claude Max for 30 Days

The Token-Per-Dollar Math: Running Claude Max for 30 Days

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10 min read
I Asked 4 AIs to Judge Each Other's Code

I Asked 4 AIs to Judge Each Other's Code

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11 min read
I Built a CLI That Searches 3 Hours of Twitch VODs in 7 Minutes

I Built a CLI That Searches 3 Hours of Twitch VODs in 7 Minutes

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7 min read
I Made an AI Product for $4.99. Then I Got Scared It Was a Scam - So I Tested It

I Made an AI Product for $4.99. Then I Got Scared It Was a Scam - So I Tested It

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10 min read
5 Dangerous Patterns in CLAUDE.md Configs (and a Free Browser Scanner to Detect Them)

5 Dangerous Patterns in CLAUDE.md Configs (and a Free Browser Scanner to Detect Them)

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6 min read
I Built a Free Safety Scanner for Claude Code Setups — Here's Why I Had To

I Built a Free Safety Scanner for Claude Code Setups — Here's Why I Had To

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6 min read
I Added 5 MCP Servers to Claude Code — Here's What Actually Worked (and What Didn't)

I Added 5 MCP Servers to Claude Code — Here's What Actually Worked (and What Didn't)

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7 min read
Claude Code Deleted My Entire Home Directory. Here's What I Built to Prevent It.

Claude Code Deleted My Entire Home Directory. Here's What I Built to Prevent It.

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7 min read
I Built a Complete Puzzle Game in a Single HTML File (Zero Dependencies)

I Built a Complete Puzzle Game in a Single HTML File (Zero Dependencies)

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4 min read
The 200 Lines of Code That Run Claude Code. The 9,800 Lines That Keep It Safe.

The 200 Lines of Code That Run Claude Code. The 9,800 Lines That Keep It Safe.

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7 min read
I Ran a 5-Agent Game Studio with Claude Code Teams

I Ran a 5-Agent Game Studio with Claude Code Teams

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4 min read
Why Your AI Agent Needs a Quality Gate (Not Just Tests)

Why Your AI Agent Needs a Quality Gate (Not Just Tests)

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11 min read
I Ran a Safety Scan on My Claude Code Setup — Here's What I Found

I Ran a Safety Scan on My Claude Code Setup — Here's What I Found

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3 min read
I Ran a Safety Scan on My Claude Code Setup — Here's What I Found

I Ran a Safety Scan on My Claude Code Setup — Here's What I Found

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3 min read
Generate Your CLAUDE.md in 30 Seconds (Interactive Script)

Generate Your CLAUDE.md in 30 Seconds (Interactive Script)

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3 min read
4 Hooks That Let Claude Code Run Autonomously (With Zero Babysitting)

4 Hooks That Let Claude Code Run Autonomously (With Zero Babysitting)

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3 min read
I Slept While My AI Completed 88 Tasks — Here's What Happened

I Slept While My AI Completed 88 Tasks — Here's What Happened

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11 min read
5 Design Patterns for LLM Agent Teams (From Someone Who Learned Them the Hard Way)

5 Design Patterns for LLM Agent Teams (From Someone Who Learned Them the Hard Way)

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8 min read
Why AI Agents Keep Making the Same Mistakes -- and How We Fixed It

Why AI Agents Keep Making the Same Mistakes -- and How We Fixed It

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7 min read
I Made $2: A Non-Engineer's First Game Sale, Built Entirely with AI

I Made $2: A Non-Engineer's First Game Sale, Built Entirely with AI

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3 min read
I Tried to Automate Marketing Across 10 Platforms with AI — Here's What Worked and What Broke

I Tried to Automate Marketing Across 10 Platforms with AI — Here's What Worked and What Broke

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9 min read
I Built a Multi-Agent AI System Where Claude Instances Manage Each Other — Here's the Architecture

I Built a Multi-Agent AI System Where Claude Instances Manage Each Other — Here's the Architecture

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6 min read
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