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 S3YED/appie-kit --skill design-masterygit clone --depth 1 https://github.com/S3YED/appie-kitWrote 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/s3yed/appie-kit/design-mastery)<a href="https://agentmods.dev/skills/s3yed/appie-kit/design-mastery"><img src="https://agentmods.dev/badge/skills/s3yed/appie-kit/design-mastery/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/s3yed/appie-kit/design-mastery"><img src="https://agentmods.dev/badge/skills/s3yed/appie-kit/design-mastery.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 | $0.00000 | $0.01863 |
| Opus 5.5 | $0.00000 | $0.00745 |
| Sonnet 5.5 | $0.00000 | $0.00373 |
| Haiku 4.5 | $0.00000 | $0.00186 |
Grade A, and why
design-mastery 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 1mo 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 — 200 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Design Mastery - Appie's Design Brain
Doel: Dit is mijn interne kennis voor design. Raadplegen bij ELK design project.
Core Principes (Refactoring UI)
1. HIERARCHY IS EVERYTHING
- Niet alle elementen zijn gelijk — Bepaal wat belangrijk is VOORDAT je begint
- Size isn't everything — Gebruik ook weight, color, spacing voor hierarchy
- De-emphasize to emphasize — Maak secundaire content zachter, niet primary louder
- Labels are a last resort — Data kan vaak voor zichzelf spreken
2. LAYOUT & SPACING
- Start with too much white space — Makkelijker om weg te halen dan toe te voegen
- 8pt spacing system: 8, 16, 24, 32, 40, 48, 64, 80px
- You don't have to fill the whole screen — Lege ruimte is geen verspilling
- Avoid ambiguous spacing — Elementen moeten duidelijk gegroepeerd zijn
3. TYPOGRAPHY
- Establish a type scale: 12, 14, 16, 18, 20, 24, 30, 36, 48, 60px
- Max 2 fonts — Meestal 1 is genoeg
- Line length: 45-75 characters — Nooit volle breedte tekst
- Line-height: 1.5 voor body, 1.2-1.3 voor headings
- Letter-spacing: Tighter voor headings, normal voor body
4. COLOR
- Ditch hex for HSL — Makkelijker om variaties te maken
- Je hebt meer kleuren nodig dan je denkt — 8-10 shades per kleur
- Greys don't have to be grey — Voeg een tint toe (warm/cool)
- 60-30-10 regel: Primary 60%, Secondary 30%, Accent 10%
- Max 3 kleuren + neutrals
5. DEPTH & SHADOWS
- Emulate a light source — Shadows gaan consistent één kant op
- Two-part shadows: Een scherpe kleine + een zachte grote
- Overlap elements — Creëert lagen en diepte
- Flat can have depth — Gebruik kleur en spacing
6. FINISHING TOUCHES
- Supercharge the defaults — Bullets → icons, borders → shadows
- Add color with accent borders — Top/left borders in brand color
- Use fewer borders — Shadows of spacing zijn vaak beter
- Empty states matter — Nooit een lege pagina zonder guidance
What ships with it
4 files 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.
- 1mo ago First seen · 200 lines · 0 tokens per session scan A 32e3b27dcc53
design-mastery is a skill published in the GitHub repository S3YED/appie-kit (12 stars, last pushed 2mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,863 tokens. 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 2026-09-03.
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