Borrowing it
Nothing to install: this file belongs to lennix1337/Genexus18MCP. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/lennix1337/Genexus18MCP/main/.gemini/skills/frontend/design-system-builder/SKILL.mdgit clone --depth 1 https://github.com/lennix1337/Genexus18MCPWrote 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/lennix1337/genexus18mcp/design-system-builder)<a href="https://agentmods.dev/skills/lennix1337/genexus18mcp/design-system-builder"><img src="https://agentmods.dev/badge/skills/lennix1337/genexus18mcp/design-system-builder/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/lennix1337/genexus18mcp/design-system-builder"><img src="https://agentmods.dev/badge/skills/lennix1337/genexus18mcp/design-system-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 5 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Prompt Injection · line 226 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
- medium Prompt Injection · line 232 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
- medium Prompt Injection · line 236 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
- medium Prompt Injection · line 233 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
- medium Prompt Injection · line 285 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
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 | $0.00075 | $0.05307 |
| Opus 5 | $0.00037 | $0.02653 |
| Sonnet 5 | $0.00015 | $0.01061 |
| Haiku 4.5 | $0.00007 | $0.00531 |
Grade A, and why
design-system-builder 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 11d 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 — 306 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Design System Builder
Build and evolve enterprise-quality CSS Design Systems on top of Chameleon web components
Scope & Relationship
- Chameleon provides the functional layer: web components (
ch-edit,ch-dialog,ch-accordion-render, etc.) with structure, behavior, and interactivity - The Design System (DS) provides the visual layer: design tokens, CSS, documentation, and processes that define how every component looks for a given brand
- The DS does not implement components. It skins Chameleon components through CSS classes, CSS custom properties,
::part()selectors, and slotted-content styling
Component-specific styling information — shadow parts, CSS custom properties, and shadow DOM layout — is maintained by the chameleon-controls-library skill. This skill provides the DS-level patterns for applying those styling APIs within a design system context
┌──────────────────────────────────────────────────────┐
│ Application │
├──────────────────────────────────────────────────────┤
│ Design System (CSS + Tokens + Docs) │
├──────────────────────────────────────────────────────┤
│ Chameleon (Web Components) │
├──────────────────────────────────────────────────────┤
│ Browser Platform │
└──────────────────────────────────────────────────────┘
Workflow
CRITICAL — Chameleon skill required: Before writing any component CSS example or documentation, you MUST invoke the chameleon-controls-library skill (via the
Skilltool). The DS handles styling only (CSS bundles, classes, tokens) — component APIs (properties, events, slots, model shapes) are documented exclusively in the Chameleon skill. Skipping it leads to wrong prop names, missing events, and broken component wiring
Follow these steps in order. Never skip steps. Ask the user when in doubt
Phase 1 — Gather Requirements
Before building anything, ask the user:
What ships with it
23 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.
- references/accessibility.md 2.9 KB
- references/component-css.md 9.5 KB
- references/css-optimization.md 5.5 KB
- references/design-foundations/color-system.md 6.5 KB
- references/design-foundations/design-patterns.md 6.1 KB
- references/design-foundations/figma-mapping.md 6.6 KB
- references/design-foundations/icons-system.md 8.8 KB
- references/design-foundations/spacing-system.md 7.6 KB
- references/design-foundations/typography-system.md 6.8 KB
- references/directory-structure.md 4.3 KB
- references/documentation.md 1.9 KB
- references/inner-skill-pattern.md 10 KB
- references/performance.md 3.3 KB
- references/quality-gates.md 3.1 KB
- references/showcase-app.md 8.1 KB
- references/theming.md 2.6 KB
- references/tokens.md 8.0 KB
- references/usage-and-consumption.md 4.7 KB
- scripts/generate-architecture.mjs 4.9 KB runs code
- scripts/generate-base.mjs 11 KB runs code
- scripts/scaffold-showcase.mjs 12 KB runs code
- scripts/scaffold.mjs 66 KB runs code
- scripts/validate-tokens.mjs 5.8 KB runs code
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.
- 11d ago First seen · 306 lines · 75 tokens per session scan A ffd5d107709b
design-system-builder is a skill published in the GitHub repository lennix1337/Genexus18MCP (30 stars, last pushed yesterday), licensed MIT. It adds 75 tokens to every session and 5,307 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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