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 layout-spatial-structuregit 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/layout-spatial-structure)<a href="https://agentmods.dev/skills/oborchers/fractional-cto/layout-spatial-structure"><img src="https://agentmods.dev/badge/skills/oborchers/fractional-cto/layout-spatial-structure/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/layout-spatial-structure"><img src="https://agentmods.dev/badge/skills/oborchers/fractional-cto/layout-spatial-structure.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 | $0.00082 | $0.01241 |
| Opus 5.5 | $0.00033 | $0.00496 |
| Sonnet 5.5 | $0.00016 | $0.00248 |
| Haiku 4.5 | $0.00008 | $0.00124 |
Grade A, and why
layout-spatial-structure 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 — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.
The Grid Is the Architecture — Everything Else Is Decoration
Every professional layout is built on a grid. The grid is not a suggestion — it is the structural skeleton that makes alignment effortless, spacing predictable, and responsive behavior automatic. Material Design, Bootstrap, and every major design system converge on the same fundamentals: a 12-column grid with an 8-point spacing system.
12-Column Grid Anatomy
| Component | Purpose | Typical Value |
|---|---|---|
| Columns | Content containers; 12 divides evenly by 2, 3, 4, 6 | 12 columns |
| Gutters | Space between columns; consistent rhythm | 16px–32px (24px default) |
| Margins | Outer breathing room on left/right edges | 16px mobile, 24px tablet, auto-center desktop |
| Container | Max-width wrapper preventing ultra-wide lines | 1200px–1440px |
Grid adherence rule: >90% of element edges must align to grid lines. Audit by overlaying a 12-column grid on any screen — misaligned elements are immediately visible.
CSS Grid vs Flexbox Decision Table
| Use Case | Choose | Reason |
|---|---|---|
| Page-level layout (header, sidebar, main, footer) | CSS Grid | Two-dimensional control over rows and columns |
| Card grids with uniform items | CSS Grid | auto-fit/auto-fill with minmax() handles responsiveness |
| Navigation bars, button groups | Flexbox | One-dimensional alignment with wrapping |
| Centering a single element | Flexbox | justify-content + align-items in three lines |
| Overlapping elements or complex placement | CSS Grid | Named grid areas and explicit row/column placement |
| Unknown number of items in a row | Flexbox | flex-wrap distributes naturally |
Default rule: Start with CSS Grid for layout, drop to Flexbox for component-level alignment.
Spacing System
Use the constrained 4px/8px spacing scale defined in the whitespace-density skill. All grid gutters, margins, and padding must come from that scale. Never use arbitrary spacing values.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 · 87 lines · 82 tokens per session scan A 0ee6d5805fba
layout-spatial-structure is a skill published in the GitHub repository oborchers/fractional-cto (32 stars, last pushed 5d ago), licensed MIT. It adds 82 tokens to every session and 1,241 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.
Other skills, from other repositories
anti-slop-design
Autonomous Principal Design Technologist. Cures vibe-coded software from AI frontend slop using curated token archetypes and 7-axis quality gating.
chakra-ui-builder
Build responsive, accessible UI components and layouts using Chakra UI v3, install or configure Chakra UI in new and existing projects, and design scalable themes using tokens, semantic tokens, recipes, and slot recipes. Use this skill whenever a user asks to build, create, or generate any UI component, page, form…
visual-ralph
Visual Ralph orchestration for frontend UI from generated references, static references, or live URL targets, using $ultragoal with built-in visual verdict and pixel-diff evidence until the implementation matches and leaves a reproducible design system.
frontend-ui-dark-ts
Build dark-themed React applications using Tailwind CSS with custom theming, glassmorphism effects, and Framer Motion animations. Use when creating dashboards, admin panels, or data-rich interfaces with a refined dark aesthetic.
prototype-web
A clickable, high-fidelity web product prototype with navigation, a hero section, feature cards, steps, social proof, and optional pricing. It is designed to resemble a finished landing page while remaining a prototype.
frontend-visual-qa
Audits rendered UI and specific task/object-link handoffs; excludes ordinary source citations alone. Audits already-rendered UI and Markdown/Obsidian image layout — web app, deck/slide, dashboard, design-system, or Electron/native app — via real-browser/native-app journeys and a Playwright sweep. Use after UI…