Build a music player by talking to Claude Code in Japanese
A developer built a music player entirely by talking to Claude Code in Japanese, even giving vague design notes like making the sidebar look like it floats.
Source
piro0919 on Hacker News · 2026-10-23
Written in our own words. Credit to the original author. Link checked 2026-10-23.
What they did
A developer built a music player entirely by talking to Claude Code in Japanese, even giving vague design notes like making the sidebar look like it floats.
Result (as claimed)
He says he can barely remember needing to drop down to code.
Tools they used
Cost: Claude Code: from $17/mo.
Set it up
Write a one-page brief
Describe the app in plain words: who it is for, the 3 core screens or actions, and what "done" looks like.
Start the project with your agent
Open Claude Code and paste the brief. Ask it to propose a stack and a file plan before writing code.
Build one slice at a time
Ship the smallest working flow first, run it, then add features one by one. Commit after each working step.
Test it like a user
Click through on desktop and phone. Ask the agent to add basic tests and fix anything that breaks.
Check security and ship
Keep keys in environment variables, check auth and database rules, then deploy and share the link.
Copy the full setup prompt
Paste into your agent and it will walk you through the setup, asking before anything that sends, posts or spends.
You are helping me set up this AI use case end to end in Claude Code. Goal: Build a music player by talking to Claude Code in Japanese What the original author did: A developer built a music player entirely by talking to Claude Code in Japanese, even giving vague design notes like making the sidebar look like it floats. Reported result (as claimed by the author): He says he can barely remember needing to drop down to code. Source: https://news.ycombinator.com/item?id=50206643 Tools they used: Claude Code Category: Vibe coding & apps Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Codex. Goal: Build a music player by talking to Claude Code in Japanese What the original author did: A developer built a music player entirely by talking to Claude Code in Japanese, even giving vague design notes like making the sidebar look like it floats. Reported result (as claimed by the author): He says he can barely remember needing to drop down to code. Source: https://news.ycombinator.com/item?id=50206643 Tools they used: Claude Code Category: Vibe coding & apps Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Grok Bot. Goal: Build a music player by talking to Claude Code in Japanese What the original author did: A developer built a music player entirely by talking to Claude Code in Japanese, even giving vague design notes like making the sidebar look like it floats. Reported result (as claimed by the author): He says he can barely remember needing to drop down to code. Source: https://news.ycombinator.com/item?id=50206643 Tools they used: Claude Code Category: Vibe coding & apps Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
The Daily 5
Get five new use cases tomorrow morning
Free. Real sources. Unsubscribe any time.
Guides for this use case
Related use cases
Build your own Vocaloid music player with Claude Code
He is building a Vocaloid music player with Claude Code, starting from another of his own apps. It worked on day one. The one thing he decided himself was swapping the colors to Miku teal.
Have Claude Code fix your App Store screenshots
He uses Claude Code to fix and regenerate the screenshots for his App Store listing.
Approve Claude Code tool calls from your MacBook notch
He shipped a notch app for Mac that shows Claude Code in the notch so you can approve tool calls and answer the agent there, alongside Spotify with live lyrics, a per-app volume mixer, AirDrop, a terminal and timers.
Let Claude Code install Unity and build a VR app from scratch
On a new MacBook, Claude Code installed Unity 6, the Unity CLI and the Pico headset CLI, then built the first version of a "freeze time" VR app using headless versions of every tool.