The LaTeX Project Team submitted an update to the

l3kernel-dev

package.

Version: 2026-03-16 License: lppl1.3c

Summary description: Development pre-release of l3kernel

Announcement text: ----------------------------------------------------------------------

### Added

- `\box_(g)frame:Nnn` and `\box_(g)underline:Nnn` - `\vbox:w`, `\vbox_top:w`, `\vbox_center:w` and their `:nw` and `_to_ht:nw` versions - Debugging switch `check-assertions`, `\debug_assert:nN(n)`, and `\debug_assert:nn(n)` (issue #1840)

### Changed

- Apply `\text_declare_purify_equivalent:Nn` to commands immediately following `\protect` - Adjust `\vbox_center:nn` to give identical dimensions to `\vcenter`

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The package’s Catalogue entry can be viewed at https://ctan.org/pkg/l3kernel-dev

The package’s files themselves can be inspected at https://mirrors.ctan.org/macros/latex-dev/required/l3kernel/

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Thanks for the upload.

For the CTAN Team Petra Rübe-Pugliese

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