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 itseffi/agentic-os --skill frontend-designgit clone --depth 1 https://github.com/itseffi/agentic-osWrote 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/itseffi/agentic-os/frontend-design)<a href="https://agentmods.dev/skills/itseffi/agentic-os/frontend-design"><img src="https://agentmods.dev/badge/skills/itseffi/agentic-os/frontend-design/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/itseffi/agentic-os/frontend-design"><img src="https://agentmods.dev/badge/skills/itseffi/agentic-os/frontend-design.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 | $0.00025 | $0.00387 |
| Opus 5.5 | $0.00010 | $0.00155 |
| Sonnet 5.5 | $0.00005 | $0.00077 |
| Haiku 4.5 | $0.00003 | $0.00039 |
Grade A, and why
frontend-design 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.
What it actually says
Frontend Design
Use this skill to design frontend behavior and UI structure before or alongside implementation.
The Process
Step 1: Define UX objective
Capture:
- user goal
- primary user flow
- success state and failure states
Step 2: Specify UI architecture
Define:
- screen/layout structure
- component hierarchy
- state model (loading, empty, error, success)
Step 3: Specify design system decisions
Set:
- typography and spacing rules
- color/contrast constraints
- interaction patterns
Step 4: Specify responsive and accessibility requirements
Include:
- breakpoints and behavior changes
- keyboard navigation expectations
- ARIA/semantic requirements
- contrast and focus visibility requirements
Step 5: Define implementation handoff
Provide:
- component list and props/state contract
- acceptance criteria
- verification checklist
Output Format
# [Feature Name] Frontend Design Spec
## UX Objective
- User goal:
- Primary flow:
- Success/failure states:
## UI Architecture
- Layout:
- Component hierarchy:
- State model:
## Responsive Behavior
- Desktop:
- Tablet:
- Mobile:
## Accessibility Requirements
- Keyboard:
- Semantics/ARIA:
- Contrast/focus:
## Handoff
- Components to implement:
- Acceptance criteria:
- Verification checklist:
Quality Bar
- Design decisions must map to user goals
- Accessibility section is mandatory
- Handoff must be implementable without extra interpretation
When to Use
Use this skill when the task directly matches the workflow described above.
When Not to Use
Do not use this skill when the request is unrelated, low-stakes, or better handled by a simpler direct response.
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.
- 1mo ago First seen · 92 lines · 25 tokens per session scan A 36664edc923a
frontend-design is a skill published in the GitHub repository itseffi/agentic-os (117 stars, last pushed 14d ago), licensed MIT. It adds 25 tokens to every session and 387 once invoked, about $0.0001 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 2026-08-30.
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