Leather & Steel: A Visual Design System for Independent Publishing at Scale

Abstract This paper documents the Leather & Steel design system used across an independent publishing operation that produces books, academic papers, spreadsheets, web content, and social media assets from a single author. The system defines color tokens, typography, chart styling, table formatting, diagram conventions, and cover composition rules in a single JSON specification consumed by every downstream tool. The five components released as supplementary material implement chart, diagram, and cover generation in matplotlib and Pillow, with consistency enforced not by review but by token import. The contribution is the forcing function design: rather than documenting guidelines and hoping they are followed, the system makes deviating from the palette harder than complying with it. What this deposit contains paper.md — the methodology paper (the citable scholarly artifact) supplementary.zip — bundled working source code for 5 component workflows covered by this paper, each with its own README, Python source, configuration, sample input, CITATION.cff, and LICENSE README.md — entry point CITATION.cff — machine-readable citation LICENSE (MIT for code) and LICENSE-DOCS (CC BY 4.0 for documentation) Production Results Across 558+ books, 30+ papers, 100+ templates, and a website redesign, visual identity has remained constant. Reader-facing review feedback in the ‘visually consistent’ or ‘looks like one author’ direction has been a common signal across distribution channels. The system has survived two redesigns of the underlying website CSS without requiring updates to the Python token file: the website inherits from tokens.json rather than the reverse. Limitations The palette is warm-earth-toned. It does not extend gracefully to cool-palette, high-saturation, or accessibility-focused redesigns. Cover generation depends on Gemini API for backgrounds; the fallback solid-color cover is functional but not on-brand. Reproducibility All five components are MIT-licensed Python modules. tokens.json is CC BY 4.0 and may be forked or extended. Companion Papers This deposit is one of ten flagship records in the Practitioner Publishing Stack series. Each flagship is a methodology paper plus the relevant working source as supplementary material. The series: I. Markdown to multi-format compile pipeline (.docx, .pdf, .epub) with consistent typography. (slug: f01-pub-compile-stack, domain: PUB) II. Detection and removal of AI writing signatures from manuscripts before publication. (slug: f02-aiq-zero-signature-pipeline, domain: AIQ) III. End-to-end pipeline from literature search to Zenodo-published, DOI-indexed academic artifact. (slug: f03-res-research-to-doi, domain: RES) IV. Six python-docx utilities for format normalization, heading conversion, and AI-signature cleanup. (slug: f04-doc-production-pipeline, domain: DOC) V. (this paper) — Visual design system: color tokens, typography, charts, diagrams, and AI cover composition. VI. Markdown-driven template engine producing branded spreadsheets and PDF checklists for direct sale. (slug: f06-tpl-spec-to-sellable, domain: TPL) VII. Per-channel specification workflow for distribution across seven publishing platforms. (slug: f07-dst-multi-platform-distribution, domain: DST) VIII. Course-materials pipeline: markdown syllabus to branded PDF and per-session DOCX. (slug: f08-edu-course-materials, domain: EDU) IX. Seven-phase book production methodology with hard quality gates and 18-day average cycle time. (slug: f09-meta-book-lifecycle, domain: META) X. Architectural overview of an independent publishing operation that produced 558+ titles. (slug: f10-meta-practitioner-publishing-stack, domain: META) Author Ibrahim Anwar (Hibranwar) ORCID: 0009-0006-0425-4923 Wikidata: Q138856145 Web: hibranwar.com Affiliation: PT Hibrkraft Kreasi Indonesia (Cileungsi, Bogor, Indonesia) License The methodology paper, configuration, and sample data are released under CC BY 4.0. The Python source code in supplementary.zip is released under the MIT License. Citation If you use this work, please cite via the DOI minted on this Zenodo record. A machine-readable CITATION.cff ships in the deposit. About the Practitioner Publishing Stack The Practitioner Publishing Stack documents an independent publishing operation by Ibrahim Anwar that produced 558+ titles across nonfiction books, public-domain translations, academic papers, and digital templates, distributed across seven platforms, with a single human as the bottleneck. Average end-to-end cycle time per title: 18 days. Operator headcount: 1.