The open source version doesn't accept protobufs, but does accept JSON.

I found this out because I set Codex the task of running this locally agains another of my apps and it worked around the limitation by running this proxy: https://gist.github.com/simonw/b0e61a0aa8e3f7d30f27ce2f747c9...

... but it turns out my stack can emit JSON just fine, so I switched to that instead. Here's me TIL write-up of getting Parseable running locally https://til.simonwillison.net/datasette/datasette-parseable-...

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