Simon Willison: I vibe coded up a web tool for pretty-printing incomplete JSON, using GPT4.5 for the initial version and then Claude 3.7 Sonnet Thinking to fix some bugs and improve the visual appearance Tool: tools.simonwillison.net/incomplete-j... - prompts and transcripts: simonwillison.net/2025/Mar/28/...

I vibe coded up a web tool for pretty-printing incomplete JSON, using GPT4.5 for the initial version and then Claude 3.7 Sonnet Thinking to fix some bugs and improve the visual appearance Tool: tools.simonwillison.net/incomplete-j... - prompts and transcripts: simonwillison.net/2025/Mar/28/...