[Bug] `conthead` template appears to be ignored

[ujtwr]

Tell us about the system on which the bug was produced

• TeXLive 2026
• LuaLaTeX
• Ubuntu Linux 24.1

I found that redefining conthead has no effect, while related templates work as expected.

Observations

The following redefinitions are effective:

\DeclareTblrTemplate{contfoot}{default}{ABC}

\DeclareTblrTemplate{conthead-text}{default}{ABC}

\DeclareTblrTemplate{middlehead}{default}{ABC}

\DeclareTblrTemplate{lasthead}{default}{ABC}

However, the following redefinition appears to be ignored:

\DeclareTblrTemplate{conthead}{default}{ABC}

No visible change occurs in the continued table header.

Investigation

In the source code, I found:

\DeclareTblrTemplate { middlehead, lasthead } { normal }
  {
    \UseTblrTemplate { capcont } { default }
  }

This seems to indicate that middlehead and lasthead use capcont directly. It is therefore unclear whether conthead is actually used anywhere in the current implementation.

Question

Is this intentional?

If conthead is supposed to be user-configurable, I would expect

\DeclareTblrTemplate{conthead}{default}{ABC}

to affect the continued table header.

If conthead is no longer used internally, should it be documented as such?