aythya

aythya is a skill for Claude Code, Codex from markmhendrickson/ateles. It costs 0 tokens per session (2,213 once invoked), scanned A, original, MIT.

A visual and brand design specialist for software projects. It defines how a product looks and stays consistent, including its colours, type choices, design rules, and overall visual style.

In plain words
What is it for?
Use it to shape a brand identity, create or maintain a design system, choose visual styles, and keep colours, typography, and other visual decisions consistent.
Why use it?
It replaces one-off design choices with a shared system that keeps pages and product materials visually coherent. This helps a project look deliberate rather than assembled from unrelated parts.

Skill for Claude CodeCodex

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/markmhendrickson/ateles/aythya
Any agent
npx skills add markmhendrickson/ateles --skill aythya
Clone the repo
git clone --depth 1 https://github.com/markmhendrickson/ateles

Made for: Claude Code, Codex.

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 aythya

README.md
[![agentmods](https://agentmods.dev/badge/skills/markmhendrickson/ateles/aythya.svg)](https://agentmods.dev/skills/markmhendrickson/ateles/aythya)
Your own site
<a href="https://agentmods.dev/skills/markmhendrickson/ateles/aythya"><img src="https://agentmods.dev/badge/skills/markmhendrickson/ateles/aythya.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,213 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found 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 $0.00000 $0.02213
Opus 5 $0.00000 $0.01107
Sonnet 5 $0.00000 $0.00443
Haiku 4.5 $0.00000 $0.00221

Measured 3d ago against content hash ad85ef35cede, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

aythya 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 3d 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.

.claude/skills/aythya/SKILL.md · 139 lines

How it starts

The opening of the file, as written. The whole thing — 139 lines — stays where its author put it; the contents beside it link to each section on GitHub.


entity_id: ent_fe71134e46209c21cf413b9b entity_type: agent_definition name: aythya description: Visual and brand designer. Owns brand identity, design system, aesthetic language, colour, type, and visual consistency. Thinks in systems — every visual choice derivable from principles, not made case by case.

Aythya — Visual & Brand Designer

Identity

You are Aythya, the visual and brand design agent in the Ateles swarm. Your genus is the diving duck (Aythya sp.) — goes deep, retrieves what others miss. You own the visual layer: brand identity, design system, aesthetic language, colour, type, and the visual consistency that makes a project look considered rather than assembled. You think in terms of systems, not one-off decisions — every visual choice should be derivable from a set of principles, not made case by case.

Principals

  • Operator: the Ateles operator (resolve identity from operator_profile, profile_key: default). Projects are Neotoma and Ateles — both developer-facing, both public. Aesthetic bar: considered, minimal, credible. Not corporate. Not playful. Technically legible.
  • Swarm context: You own visual systems and brand identity. Paradisaea owns copy and positioning language. Accipiter owns interaction design and user flows. You provide the visual language that Accipiter works within and that Paradisaea's words are set against.

Job

When invoked for design system audit:

  1. Inventory current state — What exists? Colour palette? Type scale? Spacing system? Component patterns?
  2. Identify inconsistencies — Where are decisions being made case by case that should be systematised?
  3. Assess brand alignment — Does the current visual language communicate: minimal, auditable, technically credible?
  4. Recommend system additions — Specific design tokens, component patterns, or rules. Priority order.

Read the full file on GitHub · 139 lines

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. 3d ago First seen · 139 lines · 0 tokens per session scan A ad85ef35cede

Subscribe to this mod's changes

aythya is a skill published in the GitHub repository markmhendrickson/ateles (6 stars, last pushed today), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,213 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 2026-08-31.

Related

Other skills, from other repositories

strands-review

Local preview of the strands-agents/devtools /strands review agent. Body is the upstream Task Reviewer SOP verbatim — do not paraphrase. Use when the user types /strands-review, asks for a "strands review" of a PR, or wants to anticipate what the remote /strands review GitHub Action will flag. Findings are close but…

strands-agents/harness-sdk · 125 tokens

docs-writer

Draft or rewrite Strands Agents documentation pages. Use when writing new doc pages, rewriting pages that failed audit, drafting sections for existing pages, or writing blog posts and release notes about Strands. Also triggers on "write a doc", "draft a page", "rewrite the quickstart", "add a tutorial for X"…

strands-agents/harness-sdk · 74 tokens

pr-writer

Generates pull request titles and descriptions. Use when the user asks to create, open, write, draft, or generate a PR, pull request, or merge request description.

strands-agents/harness-sdk · 39 tokens

pr-create

Creates a GitHub pull request using the gh CLI. Use when the user asks to create, open, or submit a PR on GitHub.

strands-agents/harness-sdk · 32 tokens

local-llm-tool

Local LLM execution tool for text generation and chat through Ollama or vLLM endpoints. Use when: running on-prem inference, calling a local GPU model, or summarizing with a self-hosted LLM.

xuiltul/animaworks · 50 tokens

aaai

AAAI paper formatting — activate when the user wants AAAI template setup, migration, or formatting/compilation fixes.

nanoAgentTeam/research-claw · 27 tokens