Local mimeType from filename extension can disagree with the stored blob when PDS dedupes (same CID, original mimeType wins). Record then references the blob with wrong mimeType and PDS rejects publish. Trust uploadBlob response for mimeType and size.
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A CLI for publishing standard.site documents to ATProto sequoia.pub
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fix(cli): use PDS-returned blob mimeType after upload #168
Merged 
stevedylan.dev
stevedylan.dev targeting main from fix/image-blob-mimetype
Merged opened by and assigned to stevedylan.dev targeting main from fix/image-blob-mimetype
stevedylan.dev targeting main from fix/image-blob-mimetype Commits 1
fix(cli): use PDS-returned blob mimeType after upload