Is someone still working on this? I imagine, that this should be a very small hack, or am I wrong?

Change 855565 merged by jenkins-bot:

[mediawiki/core@master] ParsoidHandler: remove subst feature from wt2html

https://gerrit.wikimedia.org/r/855565

Change 855565 had a related patch set uploaded (by Daniel Kinzler; author: Daniel Kinzler):

[mediawiki/core@master] ParsoidHandler: remove subst feature from wt2html

https://gerrit.wikimedia.org/r/855565

@cscott Are you still working on this bug and VisualEditor changes of <references responsive> to <references responsive =""> ?

Change 667411 had a related patch set uploaded (by Esanders; owner: Esanders):
[VisualEditor/VisualEditor@master] Use wrapper paragraphs in empty branch nodes

Change 641308 merged by jenkins-bot:
[mediawiki/vendor@master] Bump wikimedia/parsoid to 0.13.0-a17

Change 641308 had a related patch set uploaded (by Subramanya Sastry; owner: Subramanya Sastry):
[mediawiki/vendor@master] Bump wikimedia/parsoid to 0.13.0-a17

Change 640954 merged by jenkins-bot:
[mediawiki/services/parsoid@master] Reset slc before serializeChildrenToString

Change 640954 had a related patch set uploaded (by Arlolra; owner: Arlolra):
[mediawiki/services/parsoid@master] Reset slc before serializeChildrenToString

Might be related to T228616: 'Wikidata:' namespace prefix removed when creating a link on Wikidata, making the link a 404?

In T182740#6390587, @cscott wrote:

Wait, how would be random nonce line up if the wikitext is from the wrong revision?

Wait, how would be random nonce line up if the wikitext is from the wrong revision?

In T182740#6389867, @cscott wrote:

An idea here is to find some <meta typeof=..../> which is rendered invisibly by VE (ie, not as an icon indicating uneditable content, or whatever) -- add support for an invisible element if we can't find an existing one in VE to hijack.

Add both an HTML attribute *and* a data-parsoid attribute with a random nonce, like:

<meta integrity="cafecafe" data-parsoid='{"integrity":"cafecafe"}'/>

Verify during save processing that the two integrity tags match, and fail with a 500 error if not; also check that the "original" HTML and the "edited" HTML match. This should catch mismatches during data-parsoid recombination as well as mismatches between edited and original HTML.

An idea here is to find some <meta typeof=..../> which is rendered invisibly by VE (ie, not as an icon indicating uneditable content, or whatever) -- add support for an invisible element if we can't find an existing one in VE to hijack.

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