Only \frametitle{...} produces a tagged heading in ltx-talk. Giving the
title as the argument to \begin{frame}{...} silently yields a frame with
no heading element at all, which is why the deck had sections but nothing
per slide. Use the command form throughout.
The resulting headings sit at ltx-talk's default H4, nested under the H1
that a section produces. That level can be remapped with \tagpdfsetup if
assistive software turns out to want frame titles higher up.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Covers the build targets, why only the slides build is expected to
validate, and how the notes are captured. Also records the known gaps so
they are not rediscovered later: frame titles are not emitted as
headings despite the role map declaring frametitle -> H4, overlay
tagging has an open upstream bug for the \only forms, and talk-notes.sty
depends on two ltx-talk internals that a future release may rename.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
