agent-toolkit: Skill for Codex

.agents/skills/agent-avatar/SKILL.md

agent-avatar is a skill for Codex from sageox/agent-toolkit. It costs 69 tokens per session (1,185 once invoked), scanned A, original, Apache-2.0.

A tool for designing and publishing an agent's avatar, including its character brief and generated image. It keeps the agent's lasting identity separate from the shared visual style used to render it.

In plain words
What is it for?
Use it to create or revise avatar descriptions, generate or replace avatar images, check their consistency, and publish them.
Why use it?
It helps change an agent's appearance without losing its role or redesigning the shared art style each time.

Skill for Codex

Written for Codex: agents/openai.yaml present. Also seen: installed under .agents/ (shared by several agents); mentions AGENTS.md.

This is sageox/agent-toolkit's own configuration. It tells Codex how to work on agent-toolkit itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything agent-toolkit configures →

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is ./bin/sageox-agent create --name <agent-name>.

Reuse

Borrowing it

Nothing to install: this file belongs to sageox/agent-toolkit. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/sageox/agent-toolkit/main/.agents/skills/agent-avatar/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/sageox/agent-toolkit

Made for: 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.

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README.md
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Your own site
<a href="https://agentmods.dev/skills/sageox/agent-toolkit/agent-avatar"><img src="https://agentmods.dev/badge/skills/sageox/agent-toolkit/agent-avatar/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.

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Your own site · 80×15
<a href="https://agentmods.dev/skills/sageox/agent-toolkit/agent-avatar"><img src="https://agentmods.dev/badge/skills/sageox/agent-toolkit/agent-avatar.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 69 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,185 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00069 $0.01185
Opus 5 $0.00034 $0.00593
Sonnet 5 $0.00014 $0.00237
Haiku 4.5 $0.00007 $0.00119

Measured yesterday against content hash 7c7b4469e638, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

agent-avatar 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 yesterday.

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.

.agents/skills/agent-avatar/SKILL.md · 115 lines

How it starts

The opening of the file, as written. The whole thing — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Create an agent avatar

Use the toolkit's existing character brief, shared house style, generator, and profile publisher. Preserve durable identity separately from rendering so the roster can be restyled without redesigning every character.

Inspect the identity first

Read the agent's AGENTS.md, profile.json, and avatar.md. Read design-system.md when drafting or substantially revising the character. Use the real job and persona as evidence; do not design from the name alone.

Keep these layers separate:

  • avatar.md owns role metaphor, silhouette, signature prop, wardrobe and palette intent, background hue, expression, posture, and one role-specific joke.
  • packages/cli/src/avatar-house-style.txt owns composition, line, lighting, crop, and the rest of the shared rendering system.
  • profile.json selects avatar.svg or avatar.png for publication.

Do not copy the house style into each brief. Do not reduce identity to hex colors or model-specific prompt syntax.

Design for recognition

Make the avatar pass all of these tests:

  • The face, silhouette, signature prop, and joke read in a 32 px circular crop.
  • Eyes remain open and visible; props route behind or beside the face.
  • The expression and posture match the behavioral persona.
  • The silhouette remains distinct in grayscale.
  • A total art-style swap leaves the character recognizable.
  • No text, logo, detailed scenery, or decorative frame is needed for recognition.

Prefer one strong prop and one visual joke over many small clues. Keep humor warm and tied to the work, not to protected traits or humiliation.

Generate new artwork

For a new guided agent, the integrated flow is the user's to run in their own terminal:

./bin/sageox-agent create --name <agent-name>

The guided flow generates three candidates and pauses for a human selection. Selecting between candidates needs a terminal, so more than one candidate is something you hand to the human to run — asking for several from a tool shell fails with multiple avatar candidates need an interactive terminal for selection.

Read the full file on GitHub · 115 lines

Files

What ships with it

3 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. yesterday First seen · 115 lines · 69 tokens per session scan A 7c7b4469e638

Subscribe to this mod's changes

agent-avatar is a skill published in the GitHub repository sageox/agent-toolkit (10 stars, last pushed today), licensed Apache-2.0. It adds 69 tokens to every session and 1,185 once invoked, about $0.0003 per session on Opus 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 2026-09-10.