Print imposition · browser-local planning · 2026 · Solo — product framing, test-first imposition logic, interaction design, accessibility, responsive verification, production deployment
Folio Fold
A print-room folding bench that turns reading order into the page order physical paper needs.
The problem
Zine makers, workshop facilitators, and small-run publishers often compose pages in reading order, then have to translate them into the non-intuitive two-up order a duplex printer needs after the stack is nested and folded. Folio Fold makes that physical transformation inspectable: choose a bounded multiple-of-four extent, name each page, switch reading direction, and move through the front and back of every sheet before copying a plain-text print plan or downloading deterministic JSON. It does not upload, parse, reorder, or export a PDF, and it explicitly asks for a four-page proof because printer-driver rotation varies. Production deployment dpl_GUWYBgeWE7PSAPZKG6GmyQfbwXqi reached READY before independent Foundry harness checks proved HTTPS markers and the six-step handoff interaction at the stable production alias.
Architecture
Key decisions
Model the folded object, not a generic page list
The central interaction moves through physical sheets and their two faces. Folio labels and large page numbers remain attached to left and right print positions, so binding and nesting decisions are visible rather than buried in an export.
Keep document bytes outside the boundary
Folio Fold accepts page names, not files. It performs deterministic booklet arithmetic in one browser tab and makes no claim to inspect margins, bleed, PDF boxes, color, printer capabilities, or source-document validity.
Make the print assumption impossible to miss
The coral print-room ticket repeats duplex, actual-size, short-edge, outside-in, and proof-first instructions beside the live spread. The output carries the same instruction instead of implying every printer driver rotates backs identically.
Use one asymmetric Configure bench
A ruled cream stock, navy imposition stage, coral ticket, acid proof controls, Georgia display face, and monospace production labels create a coherent print-shop instrument without feature tiles, dashboard cards, or a generic center stack.