Typesetting the interior

python3 ${CLAUDE_PLUGIN_ROOT}/scripts/build-interior.py

Finds the nearest book.toml, computes geometry from [print], and compiles templates/interior.typ with every dimension passed in as sys.inputs. The template needs no editing when the trim or the extent moves.

Why this is not one typst compile

The even page count cannot be decided inside Typst. Printers require an even leaf count, and the extent is not known until the document is laid out. A conditional on counter(page).final() oscillates: adding the parity leaf makes the count even, which makes the condition false, which removes the leaf. The decision has to be made by something standing outside the document — so the build compiles, counts, and compiles again.