Pretty much ready to ship:

To save this setting, the shortest path is to just reload the change with an option like justSaveViewStateDoNotActuallyRenderAnything=true. But, since reloading changes is per-changeset, this is inefficient if filetree changes out of T13516 support collapsing multiple files at once.

Updating renderer is a big oof. The value sometimes depends on the window dimensions on the client.

There is currently no storage unique to a <user, changeset> pair, or a <user, diff> pair, or a <user, revision> pair.

keyboard shortcut for "Open in Editor".

I think I'm just going to no-op this migration.

This is now possible.

This is now supported.

These field functions have somewhat-weird scopes/context.

Getting through the ngram index alone isn't good enough, because LIKE operators against utf8mb4_unicode_ci treat combining accents as separate characters:

Normalizer requires intl which I'm hesitant to add a dependency on.

One possible improvement remains here: in streaming mode, HTTPSFuture will not "Accept-Encoding: gzip" and can not inflate responses. Today, this only applies to arc download.

There's also one minor related concern in PHI1638 that I want to take care of here, since it's adjacent.

In fairness, "SetInputFilter DEFLATE" is documented as uniquely opinionated, if you catch this box and read between the lines a little bit:

A grand aventure in PHI1679 led to identifying the Apache "SetInputFilter DEFLATE" directive as a problem with implementing compression.

This appears to be working properly, now.

Query parsing of certain unusual or ambiguous inputs has changed slightly.