What is hermes-cli-skinning?

A CLI theming guide that turns a reference image into a coloured text-art banner and matching terminal skin. A CLI is a command-line program used through a terminal.

It helps create image-based terminal themes, extract a colour palette, and generate compact coloured banner output.

It removes the manual work of designing terminal colours and converting artwork into readable text art while preserving its main colours.

hermes-cli-skinning — Skill for Claude Code and Codex by jxoesneon

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.

Any agent

npx skills add jxoesneon/Ciel --skill hermes-cli-skinning

Clone the repo

git clone --depth 1 https://github.com/jxoesneon/Ciel

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/jxoesneon/ciel/hermes-cli-skinning/github.svg)](https://agentmods.dev/skills/jxoesneon/ciel/hermes-cli-skinning)

Your own site

<a href="https://agentmods.dev/skills/jxoesneon/ciel/hermes-cli-skinning"><img src="https://agentmods.dev/badge/skills/jxoesneon/ciel/hermes-cli-skinning/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/jxoesneon/ciel/hermes-cli-skinning"><img src="https://agentmods.dev/badge/skills/jxoesneon/ciel/hermes-cli-skinning.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 946 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00041	$0.00946
Opus 5	$0.00020	$0.00473
Sonnet 5	$0.00008	$0.00189
Haiku 4.5	$0.00004	$0.00095

Measured 8d ago against content hash eeefaadcad29, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

hermes-cli-skinning scanned grade A with 1 finding 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 8d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

dependencies: { skills: [], mcp: [], system: ["python3", "curl"] }

skills/hermes-cli-skinning/SKILL.md · 56 lines

How it starts

The opening of the file, as written. The whole thing — 56 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CIEL ADAPTATION: Hermes CLI Skinning

This skill converts any reference image into a complete CLI skin with an image-derived banner in rich markup ([#rrggbb]char[/] runs). While originally built for Hermes CLI, the image-to-ASCII pattern is reusable for any CLI banner system — the density ramp, luminance mapping, and run-length rich-markup compression are platform-agnostic primitives.

When to Use

User asks for a theme/skin based on an image ("make my terminal look like this artwork").
Existing skins are palette-only; this adds true pictorial banner art.
Any CLI theming task requiring image-to-ASCII conversion with color preservation.

Procedure

Gather inputs: Reference image URL/path + theme identity (name, persona, accent hues). Download locally: curl -fsSL URL -o /tmp/ref.jpg.
Palette extraction: Read dominant hues (vision or quantize to ~8 colors). Derive: background (darkest), accent (most vivid), text (lightest), plus semantic ok/warn/error.
Convert — Option A (fast preview): brew install TheZoraiz/ascii-image-converter; ascii-image-converter ref.jpg -d 64,60 --save-txt out/. ANSI truecolor output — use Option B for final artifact.
Convert — Option B (recommended Pillow pipeline):
- Resize to W columns (~64) × round(W × h/w × 0.5) rows (terminal cells are ~2x tall).
- Quantize to 24 colors (Image.quantize(method=MEDIANCUT)) for compact YAML (~26KB at 64×57).
- Map luminance (0.2126R+0.7152G+0.0722B) onto ramp " .:-=+*#%@".
- Emit run-length rich markup: consecutive same-char+same-color cells become one [#hex]ccc[/] run.
Write the skin: Full schema with all colors keys present, background set, ui_accent ≥ 4.5:1 vs background. Inject art under banner_hero: |- indented exactly 2 spaces.
Validate + activate: python3 -c "import yaml; yaml.safe_load(open(skin_path))" then hermes config set display.skin <name>.

I/O Contract

Input: image path/URL, skin name, optional persona notes.
Output: skin YAML path, activation status, optional preview PNG.
Idempotent: yes — re-running overwrites the same skin file.

Read the full file on GitHub · 56 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.

8d ago First seen · 56 lines · 41 tokens per session scan A eeefaadcad29

Subscribe to this mod's changes

hermes-cli-skinning is a skill published in the GitHub repository jxoesneon/Ciel (1 stars, last pushed 4d ago), licensed Apache-2.0. It adds 41 tokens to every session and 946 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

Autonomous Agents Claude Code Creative and media agentic-workflows ai ciel domain:design gemini-cli harmonized multi-agent-systems

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hermes-cli-skinning

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Makes network callslowCapability

How it starts

CIEL ADAPTATION: Hermes CLI Skinning

When to Use

Procedure

I/O Contract

What this file has done since we first saw it

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