&gt; priming Brotli&#x27;s (de)compressor&#x27;s history buffer with...the old version...if both sides...advertise the encoding<p>Too late to edit, but I mean a separate Accept-Encoding value for the diff-like usage (brdiff or whatever), not piggy-backing on the value already being added for Brotli. Clearly if you&#x27;re messing with the history buffer it&#x27;s no longer Brotli-as-we-know-it.