MusicFlow
MusicFlow on note
Build and experiment logs
The real development records behind this site, serialized on note. The backbone is Prompt Agile — a solo-dev method that runs design, implementation and App Store submission on nothing but prompts and Markdown — alongside development diaries for the apps on this site, wrong turns included.
The articles are written in Japanese.
Ongoing series
Main series · 12 articles (3 paid)
Prompt Agile — solo development driven by prompts
The core series on the method itself: design, implementation, App Store submission and operations, all run on prompts and Markdown — with the actual prompts included, ready to copy.
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12 articles
Prompt Agile: the Headroom diary
The development diary of Headroom, the iPad-to-Mac remote desktop — from an app built while lounging in bed to a tool that goes from bug report to review submission in an hour.
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13 articles
Prompt Agile: the note MCP diary
Building an MCP server that automates note.com publishing: a small tool born of slow browser work, growing into a teammate that handles everything up to the publish button.
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11 articles
Prompt Agile: the Rythmique diary
Rebuilding a 2015 children's eurhythmics app with AI, ten years later. Each article is two-in-one: teaching material for music teachers up front, developer war stories in the back.
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5 articles
Prompt Agile: the Cube diary
One app, recorded end to end: the Rubik's-cube app Cube, from making AI write the solver to camera state reading and a zero-fixed-cost API server.
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6 articles
Music × AI
Will AI make creators obsolete? No — and here is why, from an engineer who builds music apps and writes music: copyright for makers, what AI actually listens to, and a map of AI music tools.
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