[csswg] Agenda for conf call on Dec 20, 2023

Time/Phone/Zoom details available to WG Members in w3c-css-wg.
See https://lists.w3.org/Archives/Member/w3c-css-wg/2023JulSep/0095.html
https://www.timeanddate.com/worldclock/fixedtime.html?iso=20231220T17
0. Extra agenda items and other digressions

1. [css-color-hdr] Add mechanism to query HDR headroom
    https://github.com/w3c/csswg-drafts/issues/9306

2. [css-color-hdr] predefined HDR profile with BT.2100 and the PQ transfer curve
    https://github.com/w3c/csswg-drafts/issues/553


3. [css-text-4] initial value of text-spacing
    https://github.com/w3c/csswg-drafts/issues/9511#issuecomment-1839208142

4. [css-view-transitions-1] Disallow `auto` as `view-transition-name`
    https://github.com/w3c/csswg-drafts/issues/9639

5. [css-scoping] Always serialize implicit :scope?
    https://github.com/w3c/csswg-drafts/issues/9621

6. [css-transitions-2] Transition to/from height/width `auto`
    https://github.com/w3c/csswg-drafts/issues/626#issuecomment-1800254442

7. [css-values] Make min and max value optional in clamp()
    https://github.com/w3c/csswg-drafts/issues/9713

Thanks,
Rossen