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 kok-o/contextos-agents --skill impeccable-designgit clone --depth 1 https://github.com/kok-o/contextos-agentsWrote 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/kok-o/contextos-agents/impeccable-design)<a href="https://agentmods.dev/skills/kok-o/contextos-agents/impeccable-design"><img src="https://agentmods.dev/badge/skills/kok-o/contextos-agents/impeccable-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/kok-o/contextos-agents/impeccable-design"><img src="https://agentmods.dev/badge/skills/kok-o/contextos-agents/impeccable-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 | $0.00057 | $0.02843 |
| Opus 5.5 | $0.00023 | $0.01137 |
| Sonnet 5.5 | $0.00011 | $0.00569 |
| Haiku 4.5 | $0.00006 | $0.00284 |
Grade A, and why
impeccable-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 today.
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.
Copies of this mod
1 near-identical copy found in the catalogue:
- impeccable-design — 89% identical, 66 lines differ
How it starts
The opening of the file, as written. The whole thing — 202 lines — stays where its author put it; the contents beside it link to each section on GitHub.
impeccable-design
Overview
Hard QA design review checklist consisting of 50 deterministic rules covering typography (T1-T10), color systems (C1-C12), layout constraints (L1-L11), component contracts (K1-K11), and micro-animations (A1-A8).
When to Use
Activate during the REVIEW phase of all frontend tasks as a strict visual and functional QA gate before marking UI work complete.
Rules & Patterns
Based on pbakaus/impeccable - deterministic detector rules for AI-generated frontend design.
Core Principle
Every model is trained on the same SaaS templates. Skip this guidance and you get the same handful of tells on every project. Impeccable eliminates them.
Role in the Pipeline
This skill acts as a QA-designer at the
/reviewphase.ui-ux-prois the planning guideline;impeccable-designis the hard checklist that runs before merge.
Anti-Pattern Rules
Typography (Rules T1 - T10)
| Rule | Anti-Pattern | Correct Approach |
|---|---|---|
| T1 | Using Inter for all text | Use Inter for UI body, pair with a distinct display font for headings OR with JetBrains Mono for technical/number accents (premium SaaS pattern) |
| T2 | Using Arial or Helvetica | Use a curated Google Font pairing |
| T3 | All text same weight | Use weight contrast: 700 headings, 400 body, 500 labels |
| T4 | Line height = 1 (tight) | Body: 1.6-1.8, Headings: 1.1-1.3 |
| T5 | No letter-spacing on caps | Uppercase labels: letter-spacing: 0.08em (Tailwind: tracking-widest) |
| T6 | Text too wide | Max line length: 60-75 characters - use max-w-prose or max-w-[65ch] |
| T7 | Monospace only for code | Use tabular-nums Tailwind class for number tables and data grids |
| T8 | Random font sizing | Use a consistent modular scale (1.25× or 1.333×) - use Tailwind's text-* scale |
| T9 | Body text too small | Minimum text-sm (14px) for body, never smaller than 12px |
| T10 | Bold everywhere | Bold is for emphasis. Diluted if overused. |
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.
- today First seen · 202 lines · 57 tokens per session scan A 4ac59041b11e
impeccable-design is a skill published in the GitHub repository kok-o/contextos-agents (10 stars, last pushed today), licensed Apache-2.0. It adds 57 tokens to every session and 2,843 once invoked, about $0.0002 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 2026-10-25.
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