Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add oborchers/fractional-cto --skill using-visual-design-principlesgit clone --depth 1 https://github.com/oborchers/fractional-ctoWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/oborchers/fractional-cto/using-visual-design-principles)<a href="https://agentmods.dev/skills/oborchers/fractional-cto/using-visual-design-principles"><img src="https://agentmods.dev/badge/skills/oborchers/fractional-cto/using-visual-design-principles/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/oborchers/fractional-cto/using-visual-design-principles"><img src="https://agentmods.dev/badge/skills/oborchers/fractional-cto/using-visual-design-principles.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00072 | $0.01182 |
| Opus 5.5 | $0.00029 | $0.00473 |
| Sonnet 5.5 | $0.00014 | $0.00236 |
| Haiku 4.5 | $0.00007 | $0.00118 |
Grade A, and why
using-visual-design-principles scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.
These are research-backed, opinionated principles grounded in VisAWI (Moshagen & Thielsch), Gestalt psychology, Refactoring UI, WCAG 2.2, Material Design, Apple HIG, and decades of empirical aesthetics research.
How to Access Skills
Use the Skill tool to invoke any skill by name. When invoked, follow the skill's guidance directly.
Available Skills
| Skill | Triggers On |
|---|---|
visual-design-principles:layout-spatial-structure |
Grid systems, 12-column grid, CSS Grid/Flexbox, alignment, 8px spacing, card layouts, spatial composition |
visual-design-principles:typography |
Font selection, type scales, font pairing, line height/length, headings, web fonts, responsive type |
visual-design-principles:color-theory-application |
Color palettes, HSL, harmony schemes, 60-30-10, shade scales, dark mode, contrast, data viz colors |
visual-design-principles:whitespace-density |
Spacing systems, padding/margins, content density, section gaps, vertical rhythm, separation techniques |
visual-design-principles:visual-hierarchy |
Focal points, 3-tier hierarchy, CTA design, scanning patterns, label-data, emphasis, de-emphasis |
visual-design-principles:consistency-design-systems |
Design tokens, component libraries, atomic design, CSS custom properties, cross-screen consistency |
visual-design-principles:craftsmanship-polish |
Pixel alignment, image optimization, shadows, border-radius, micro-interactions, loading/empty states, CLS |
visual-design-principles:visual-interest-expression |
Brand personality, illustrations, photography, motion, visual motifs, layout variety, template independence |
visual-design-principles:responsive-design |
Mobile-first, breakpoints, fluid grids, container queries, touch targets, responsive images/tables |
visual-design-principles:accessibility-inclusive-design |
WCAG 2.2, contrast ratios, color blindness, keyboard nav, screen readers, focus indicators, testing |
visual-design-principles:design-evaluation-scoring |
8-dimension scoring, design audits, anti-pattern detection, evaluation workflow, quality benchmarks |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 5d ago First seen · 95 lines · 72 tokens per session scan A 969689390b28
using-visual-design-principles is a skill published in the GitHub repository oborchers/fractional-cto (32 stars, last pushed 5d ago), licensed MIT. It adds 72 tokens to every session and 1,182 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-13.
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