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Why tho? AI Studio has this model available and I don't need to paste the API key anywhere

https://aistudio.google.com/generate-speech?model=gemini-3.8...

Because building my own is a better way to understand the capabilities of the model and how to use it - and to verify that it can be used via CORS.

Did you 'build' it or did you vibe code it?

Bit of both. I define "vibe coding" as building without looking at the code at all. For this one I was reading the code to understand how it works, and I then followed up several times to adjust how it was working.

Full session here: https://tools.simonwillison.net/markdown-svg-renderer?url=ht...

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