fix: restore Nextcloud 28 support — the 32 floor breaks eight consumer repos

[rubenvdlinde]

#2378 raised min-version 28 → 32. Its premise was correct when written and is no longer:

"the registration listener cannot prevent it, because the failure happens when PHP reads the class header, not when the provider is registered"

That was true — and #2372 is what changed it. #2372 removed every eager reference to ContentProvider (the command's constructor typehint and the listener's), so the class is now only loaded from inside interface_exists(...) guards. On a server without OCP\ContextChat the class header is never read: the feature is inert, and nothing logs.

What the floor actually costs

min-version is enforced at install time, so 32 makes occ app:enable openregister refuse on 31. Eight fleet repos install openregister as an additional-app while testing stable31 — procest, shillinq, portaliq, openbuild, decidesk, doriath, hermiq, larpingapp. Each now fails its seed with:

{"success":false,"message":"OpenRegister is not installed or enabled"}

and then a 404 from /api/configurations/import, because the fallback importer belongs to the app that did not install. Observed on procest#758, where it looked for a while like a manifest bug in that PR.

Evidence that 31 works

procest's e2e installs openregister at development and runs stable31. Its run at 2026-08-06T14:04Z — six minutes after #2372 merged at 13:58Z — passed. The app demonstrably boots, enables and serves on NC 31 with that fix in place.

The CI compose's second reason for a 32 floor does not hold either: OCP\DB\Types::DATETIME_IMMUTABLE is present in stable31 as well as 32. Checked directly against both branches.

This also corrects my own error

#2372 and its test say "NC 33" throughout. That came from a local lookup against refs this checkout does not have — which answers ABSENT for everything. It is exactly the failure a positive control exists to catch, and I did not run one at the time. Verified properly, with IUserManager.php as the control:

branch	IContentProvider	control
stable31	404	200
stable32	200	200

So the interfaces arrive in 32, not 33. Every "NC 33" claim in the listener, the command and the guard test is corrected.

What stays true from #2378

28-31 remain untested by this repo's own CI. That is a real coverage gap and worth closing — but it is a different thing from declaring those versions unsupported. The eight repos above are the coverage, and they were green on 31 until the floor moved.

26 ContextChat tests pass; phpcs clean.

[github-actions]

Quality Report — ConductionNL/openregister @ 1859ffb

Check	PHP	Vue	Security	License	Tests
lint	✅
phpcs	✅
phpmd	✅
psalm	✅
phpstan	✅
phpmetrics	✅
eslint		✅
stylelint		✅
build		✅
check-specs		✅
test-l10n		✅
composer			✅	✅ 173/173
npm			✅	✅ 546/546
PHPUnit					✅
Newman					✅
Playwright					✅
Hydra gates					✅

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Quality workflow — 2026-08-07 10:00 UTC

Download the full PDF report from the workflow artifacts.