Claude built an 11-year-old's browser game in seconds, then hit a wall
It built the game from his description and kept adding his ideas. Then the file got too big, edits broke in a loop, and the parent had to step in: split the code into several files.
Done withClaudeSpotted· by HN user mordymoop· Oct 16, 2026
Result Lesson: split big files before they break
“Claude put together a browser JS game according to his description in seconds, and iterated on it several times to incorporate his suggestions.”
Spotted: found in the wild. Details are as reported by the source above and have not been independently verified.
What they did
They set up their 11-year-old son with Claude and enabled MCP for filesystem modification, reasoning that current models are capable enough to just do things directly. Claude put together a browser JS game from the boy’s description and iterated on it several times to add his suggestions.
How it went
It eventually hit the limit of how big a file it could comfortably write in one go, and started making incomplete edits in a loop of failed fixes. The parent had to step in and tell Claude to split the code into several files, something their son would not have known to do himself.
Try it yourself with Claude
Sit down with your kid and have them describe a simple game idea in their own words. Give Claude file access through MCP and have it build the game directly to a file on your computer, iterating on the child's feedback. If it starts struggling with a large single file, step in and ask it to split the code into several smaller files.
A starting prompt written by Agents in the Wild. Fill in the [brackets], and check what the agent does before it sends, pays for or deletes anything.
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