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impeccable

impeccable is a skill for Claude Code, Codex from ne11nn/cantos-plugin. It costs 189 tokens per session (3,055 once invoked), scanned A, a copy of impeccable, MIT.

A frontend design and improvement guide for websites, dashboards, forms, product interfaces, and other user-facing screens.

In plain words
What is it for?
Use it to design, redesign, review, polish, optimize, animate, or simplify frontend components and screens.
Why use it?
It helps turn unclear or rough interfaces into more consistent, understandable designs and working code.

Skill for Claude CodeCodex

Part of the cantos plugin — 25 skills, 2 commands, 11 agents, 2 hooks shipped together

not rated 1 yesterday A scan 189 tokens copy · 86% MIT
View the source file ne11nn/cantos-plugin
Install

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.

agentmods
npx agentmods add skills/ne11nn/cantos-plugin/impeccable
Any agent
npx skills add ne11nn/cantos-plugin --skill impeccable
Clone the repo
git clone --depth 1 https://github.com/ne11nn/cantos-plugin

Made for: Claude Code, Codex.

Or install cantos, the plugin that ships this one along with the rest of its 25 skills, 2 commands, 11 agents, 2 hooks.

Wrote 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.

agentmods badge for impeccable

README.md
[![agentmods](https://agentmods.dev/badge/skills/ne11nn/cantos-plugin/impeccable.svg)](https://agentmods.dev/skills/ne11nn/cantos-plugin/impeccable)
Your own site
<a href="https://agentmods.dev/skills/ne11nn/cantos-plugin/impeccable"><img src="https://agentmods.dev/badge/skills/ne11nn/cantos-plugin/impeccable.svg" alt="Measured on agentmods" height="20"></a>
Per session 189 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,055 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 86% copy Near-identical to another mod in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00189 $0.03055
Opus 5 $0.00095 $0.01528
Sonnet 5 $0.00038 $0.00611
Haiku 4.5 $0.00019 $0.00305

Measured 4d ago against content hash 61675efdbee2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

impeccable 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 4d ago.

The scan reads SKILL.md. This mod also ships 22 executable files (scripts/cleanup-deprecated.mjs, scripts/critique-storage.mjs, scripts/design-parser.mjs, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Origin

This is a copy

86% identical to impeccable — 75 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

system/.claude/skills/impeccable/SKILL.md · 169 lines

How it starts

The opening of the file, as written. The whole thing — 169 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Designs and iterates production-grade frontend interfaces. Real working code, committed design choices, exceptional craft.

Setup

Before any design work or file edits:

  1. Load context (PRODUCT.md / DESIGN.md) via the loader script.
  2. Identify the register and load the matching register reference (brand.md or product.md).
  3. If the user invoked a sub-command (e.g. craft, shape, audit), load its reference file too. This is non-negotiable: craft without craft.md loaded means you'll skip the shape-and-confirm step the user expects.

Skipping these produces generic output that ignores the project.

1. Context gathering

Two files, case-insensitive. The loader looks at the project root by default and falls back to .agents/context/ and docs/ if the root is clean. Override with IMPECCABLE_CONTEXT_DIR=path/to/dir (absolute or relative to cwd).

  • PRODUCT.md: required. Users, brand, tone, anti-references, strategic principles.
  • DESIGN.md: optional, strongly recommended. Colors, typography, elevation, components.

Load both in one call:

node .claude/skills/impeccable/scripts/load-context.mjs

Consume the full JSON output. Never pipe through head, tail, grep, or jq. The output's contextDir field tells you where the files were resolved from.

If the output is already in this session's conversation history, don't re-run. Exceptions requiring a fresh load: you just ran /impeccable teach or /impeccable document (they rewrite the files), or the user manually edited one.

/impeccable live already warms context via live.mjs. If you've run live.mjs, don't also run load-context.mjs this session.

If PRODUCT.md is missing, empty, or placeholder ([TODO] markers, <200 chars): run /impeccable teach, then resume the user's original task with the fresh context. If the original task was /impeccable craft, resume into /impeccable shape before any implementation work.

If DESIGN.md is missing: nudge once per session ("Run /impeccable document for more on-brand output"), then proceed.

Read the full file on GitHub · 169 lines

Files

What ships with it

59 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.

Changes

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.

  1. 4d ago First seen · 169 lines · 189 tokens per session scan A 61675efdbee2

Subscribe to this mod's changes

impeccable is a skill published in the GitHub repository ne11nn/cantos-plugin (1 stars, last pushed yesterday), licensed MIT. It adds 189 tokens to every session and 3,055 once invoked, about $0.0009 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to impeccable, differing in 75 lines, and is treated as a copy.

CSS and stylingDesign and UXFrontendMulti-Agentagentic-aiai-agentsclaude-codeclaude-code-pluginorchestrator
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