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 typographygit 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/typography)<a href="https://agentmods.dev/skills/oborchers/fractional-cto/typography"><img src="https://agentmods.dev/badge/skills/oborchers/fractional-cto/typography/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/typography"><img src="https://agentmods.dev/badge/skills/oborchers/fractional-cto/typography.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 | $0.00088 | $0.01743 |
| Opus 5.5 | $0.00035 | $0.00697 |
| Sonnet 5.5 | $0.00018 | $0.00349 |
| Haiku 4.5 | $0.00009 | $0.00174 |
Grade A, and why
typography 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 — 120 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Typography Is the Foundation — Get It Right and Everything Else Follows
Typography accounts for 95% of web design (Oliver Reichenstein, iA). A correct type system makes every page look intentional. A broken one makes every page look amateur — regardless of color, imagery, or layout.
The 2-3 Font Family Maximum
Limit every project to 2-3 font families maximum. More than three creates visual noise and increases page weight.
Pairing strategy — contrast, not similarity:
| Pairing Type | Heading | Body | Example |
|---|---|---|---|
| Serif + Sans-serif | Playfair Display | Inter | Editorial, marketing |
| Geometric + Humanist | Poppins | Source Sans Pro | SaaS, dashboards |
| Monospace + Sans-serif | JetBrains Mono | Inter | Developer tools |
| Single family | Inter (bold) | Inter (regular) | Minimal, utilitarian |
The single-family approach (one typeface, varied weights) is the safest choice for applications. It guarantees harmony and reduces load time.
Modular Type Scale
Define font sizes using a mathematical ratio, not arbitrary values. Multiply the base size by the ratio for each step.
Base size: 16px (1rem). Never go below 16px for body text on screens.
| Scale Name | Ratio | Sizes from 16px base |
|---|---|---|
| Minor Third | 1.200 | 16 / 19.2 / 23.0 / 27.6 / 33.2 |
| Major Third | 1.250 | 16 / 20 / 25 / 31.3 / 39.1 |
| Perfect Fourth | 1.333 | 16 / 21.3 / 28.4 / 37.9 / 50.5 |
| Golden Ratio | 1.618 | 16 / 25.9 / 41.9 / 67.8 / — |
Selection guide: Use Minor Third for dense UIs (dashboards, admin panels). Use Major Third or Perfect Fourth for content-heavy pages. Use Golden Ratio sparingly — only for dramatic editorial layouts.
Line Height Rules
| Context | Line Height | Reason |
|---|---|---|
| Body text | 1.4–1.6 | Optimal readability per Bringhurst |
| Headings | 1.1–1.3 | Tighter to maintain visual weight |
| ALL CAPS text | 1.0–1.2 | Caps are uniform height; needs less leading |
| Small/caption text | 1.5–1.7 | Smaller text needs proportionally more space |
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 · 120 lines · 88 tokens per session scan A 85a3ad06549d
typography is a skill published in the GitHub repository oborchers/fractional-cto (32 stars, last pushed 5d ago), licensed MIT. It adds 88 tokens to every session and 1,743 once invoked, about $0.0004 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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