Apply twelve Nostr-driven revisions to the Book Designer spec:
1. **Sidecar architecture.** Pages, masters, and the cover spread
are now separate addressable kind-30078 events
(`casewrap-page`, role-discriminated). The book is a thin
`casewrap-book` manifest that references them by
`{ kind, pubkey, dTag }` — the same shape Linked Designs
already speaks. Edit one page → that page event replaces; the
manifest only changes when order / list / spec moves.
2. **Masters as Nostr objects.** Each master is its own event; one
"Body pages" master can be referenced by many books and forked
by other authors. Default master lives on the manifest spec.
3. **Cover as a sidecar event** with `role: 'cover-spread'` so it
can iterate independently and be republished as standalone
marketing art.
4. **Linked Designs is the precedent.** The resolver IIFE,
progressive fetch, localStorage disk cache, batched relay
queries, upstream-update notifications, and attribution chain
all transfer verbatim. Call this out explicitly so we don't
reinvent the wheel.
5. **Addressable refs everywhere.** Manifest entries use the
existing `{ kind, pubkey, dTag }` form (convertible to naddr at
the UI layer), not local UUIDs.
6. **Premium gating + tips.** New "Premium, tipping, gating"
section covers whole-book paywall (gate the manifest),
per-chapter paywall (gate individual page events via
PREMIUM_DESIGNS), and NIP-57 zaps at any granularity.
7. **Reader Mode** added as Phase G — the Slide Decks' Presenter
Mode counterpart, with progressive page fetch, TOC sidebar,
page-flip nav, and inline zap-to-unlock.
8. **Embed integration.** EXTERNAL_EMBED learns `?book=<naddr>`
for a flip-book iframe player; same transport + CSP rules.
9. **Per-page reactions / comments** work for free because each
page is its own addressable event (NIP-25 + kind-1). One-liner
in product goals + Reader Mode acceptance.
10. **`{page-count}` semantics pinned.** Defaults to *numbered*
pages; new `{physical-page-count}` exposes the raw total.
Plus `{book-author}` for the manifest pubkey.
11. **NIP-23 distinction.** Explicit non-goal — Book mode is
fixed-layout design, not reflowable prose; for prose use
NIP-23 long-form articles directly.
12. **Manifest schema.** Pages now carry
`{ ref, label?, inheritsMasterRef, skipNumber, gating? }`;
page-side fields that vary per-book (master, skipNumber,
label) moved off the page event onto the manifest entry.
Phase D split into D1 (publish individual page / master / cover
events) and D2 (publish the manifest); new Phase G (Reader Mode +
embed); new Phase H (premium gating). Acceptance summary,
cross-surface reactivity, and risks updated to match.
TODO.md's Book Designer summary rewritten to reflect the
sidecar plan.
New BOOK_DESIGNER_FEATURE.md drafts a top-level templateMode: 'book'
that orchestrates the existing cover designer, deck overview, and
custom-art canvas around a shared document spec (trim size, page
count, paper thickness, bleed). Spine width derives from page count
× paper thickness; the cover view goes read-only on the spine
column when in derived mode. Pages reuse the deck-sorter UI for
reordering; the per-page editor is the custom-art canvas bound to
a book-page:<id> target with prev / next page nav. Masters render
underneath each inheriting page and support {page-number} /
{page-count} / {book-title} token substitution.
PDF export ships in its own phase (E), backed by a vendored
pdf-lib (~80 KB). Single-file (cover + interior) and split (cover
PDF + interior PDF) output modes; bleed + crop-mark options;
v1 flattens text to vector for font-fidelity, with vector PDF
text as a follow-up.
Phased: A (spec + skeleton) → B (pages + editor) → C (masters) →
D (publish) → E (PDF export) → F (templates + deck-to-book
import). Non-goals: reflowable text, footnotes, automatic TOC,
CMYK / ICC, imposition, mixed page sizes in one book.
Linked from README's "Drafted-but-unbuilt" list and TODO.md.
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