Agent rule
The Digital Loop book TOC is ankitzen.com/digital-loop/blog/ (same host as the offer). Five parts, 31 chapters. Source: ankitzen/digital-loop/book.json; HTML from ankitzen/_build-pages.js. Recurring chapter logic: Input → Process → Output → Feedback → Improvement. Unpublished chapters are listed, not linked — do not stub empty chapter pages. Offer stays at /digital-loop/. No thedigitalloop subdomain. Do not publish these chapters on DTD /blog.
Status: Accepted
Context: The book is the philosophy and framework (how a modern business should be designed). The offer page is the embed. A later diagnostic/calculator/implementation system on the site is allowed — do not stub it until asked.
Decision: Path under the existing door. One menu item still points at /digital-loop/; the book is nested.
Consequences: Edit book.json then node ankitzen/_build-pages.js. Flip a chapter to published only when the essay exists at /digital-loop/blog/{slug}/. Cross-link DTD’s *The Complete Digital Loop* essay; do not duplicate it as chapter 4.