Solo developer builds a multiplayer wizard game in 19 days with Claude Code

What the research found

Solo developer built free browser wizard game Spellblunder in 19 days using Claude Code with Opus 5.5, about 1,000 commits and 2,552 automated tests, with 92 bugs fixed by a multi-agent workflow.

Claims and how well the evidence supports them

1. About 1,000 commits in 19 days built Spellblunder with Claude Code Opus 5.5 98%
2. The project has 2,552 automated tests 99%
3. Spellblunder shipped 92 bugs fixed via a multi-agent bug hunt 96%
4. Spellblunder is free and playable in browser, desktop only 97%

Evidence

• reddit.com https://reddit.com/r/ClaudeAI/comments/1xbfe8b/claude_code_opus_55_and_i_made_a_multiplayer
• spellblunder.com https://spellblunder.com

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