The dimension guard and the input-format detection used Go's decoder registry in both builds, so with libvips they were silently skipped for everything Go cannot read, and a webp source came back as a JPEG where imagor keeps it a webp. Each build now reads the header with the library that will decode the image, the guard runs on that, and the animated gif path is shared instead of living in both encoders. The hook names stay per build, the function variables are typed per build, so the any and its seven type assertions are gone.
Dominik Schmidt
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