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 Owl-Listener/inclusive-design-skills --skill flexible-typographygit clone --depth 1 https://github.com/Owl-Listener/inclusive-design-skillsWrote 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/owl-listener/inclusive-design-skills/flexible-typography)<a href="https://agentmods.dev/skills/owl-listener/inclusive-design-skills/flexible-typography"><img src="https://agentmods.dev/badge/skills/owl-listener/inclusive-design-skills/flexible-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/owl-listener/inclusive-design-skills/flexible-typography"><img src="https://agentmods.dev/badge/skills/owl-listener/inclusive-design-skills/flexible-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 | $0.00087 | $0.00852 |
| Opus 5 | $0.00044 | $0.00426 |
| Sonnet 5 | $0.00017 | $0.00170 |
| Haiku 4.5 | $0.00009 | $0.00085 |
Grade A, and why
flexible-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 13d 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 — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Flexible Typography
Design type systems that flex with the user — scaling smoothly, spacing generously, and never breaking when someone needs text larger, more spaced, or in a different font.
Core Requirements
Relative Units Always
- Use rem for font sizes (relative to root, user-controllable)
- Use em for spacing that should scale with text
- Never use px for font size — it overrides user preferences
- Base font size: let the browser default (usually 16px) be your starting point, don't override it
Minimum Sizes
- Body text: 1rem minimum (never smaller)
- Small text / captions: 0.875rem minimum
- Labels and UI text: 0.875rem minimum
- If text is essential, it should be readable without zooming
Line Height
- Body text: 1.5 minimum (WCAG requirement)
- Headings: 1.2–1.3 (tighter is acceptable for large text)
- Line height should scale with font size — use unitless values (1.5 not 24px)
Spacing
- Paragraph spacing: at least 1.5× the font size
- Letter spacing: don't compress below browser default
- Word spacing: don't compress below browser default
- Users must be able to override spacing without breaking layout (WCAG 2.1 Level AA, Success Criterion 1.4.12)
Design Patterns
Scalable Type Scale
- Define a type scale using relative ratios (1.25, 1.333, 1.5)
- Each step should be perceptibly different
- 4–6 sizes is enough for most interfaces
- Example: 0.875rem, 1rem, 1.25rem, 1.5rem, 2rem, 2.5rem
User-Override Safe
- Don't set fixed heights on text containers
- Use min-height instead of height for elements containing text
- Let containers grow when text grows
- Test with: 200% text size, 200% zoom, extra letter and word spacing
- If layout breaks at any of these, the CSS needs fixing
Font Selection
- Prioritise readability over aesthetics
- Sans-serif fonts are generally easier for screen reading (but this is preference, not rule — test with your audience)
- Ensure the chosen font has:
- Clear distinction between similar characters (Il1, 0Oo, rn/m)
- Consistent x-height
- Adequate character spacing at default settings
- Provide a font-family stack that degrades gracefully
- Never prevent users from overriding with their preferred font
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.
- 13d ago First seen · 84 lines · 87 tokens per session scan A 60ed6308b943
flexible-typography is a skill published in the GitHub repository Owl-Listener/inclusive-design-skills (98 stars, last pushed 3mo ago), licensed MIT. It adds 87 tokens to every session and 852 once invoked, about $0.0004 per session on Opus 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 2026-08-30.
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