Three generations in a row fell back to plain slides for the same reason,
visible once a failed reply was kept whole: the model wrote "rows":[[…]]}
and then ,"notes":"…"} — the slide closed before its notes, which is not
JSON. On parse failure the one premature brace is removed, bounded to the
schema's slide keys; a brace that legitimately closes an inner object is
left alone. Both test generations now come back as designed decks.
Modify used to hand the model's new deck back without its theme; the look
is the author's, so it is carried over, and the column agrees.
Failed deck replies are kept under data/logs/deck-failures for the next
time "the reply was not a deck" needs reading rather than guessing.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Dv6sqaY6Vq3ChZHMem3cnU
89f1aca8ed