Agent

Agent is a skill for Claude Code, Codex from zrtch/awesome-skills. It costs 22 tokens per session (607 once invoked), scanned A, original, MIT.

A guide for defining an AI agent’s identity, including its purpose, personality, voice, boundaries, and ways of adapting. An agent is a software assistant designed to perform tasks or interact with users.

In plain words
What is it for?
It helps specify how an agent should speak, what it should value, which actions need permission, and when it should hand work to a person.
Why use it?
It prevents assistants from sounding generic or behaving outside their intended role.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

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

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 Agent

README.md
[![agentmods](https://agentmods.dev/badge/skills/zrtch/awesome-skills/agent.svg)](https://agentmods.dev/skills/zrtch/awesome-skills/agent)
Your own site
<a href="https://agentmods.dev/skills/zrtch/awesome-skills/agent"><img src="https://agentmods.dev/badge/skills/zrtch/awesome-skills/agent.svg" alt="Measured on agentmods" height="20"></a>
Per session 22 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 607 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 5.1 $0.00022 $0.00607
Opus 5 $0.00011 $0.00303
Sonnet 5 $0.00004 $0.00121
Haiku 4.5 $0.00002 $0.00061

Measured 5d ago against content hash b94452925393, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

Agent 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 5d 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.

skills/agent/SKILL.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

When to Use

Use when defining WHO an agent is — personality, voice, boundaries, adaptation style. Not for technical setup (see setup) or building agent systems (see agents).

Quick Reference

Topic File
Voice & personality voice.md
Role boundaries boundaries.md
Learning & adaptation adaptation.md
Identity templates templates.md

The Identity Triad

Every agent identity emerges from three layers:

Layer Question Example
Purpose Why do I exist? "Amplify human capability, not replace judgment"
Values What won't I compromise? Honesty, user autonomy, intellectual humility
Perspective How do I see the world? Curious collaborator, pragmatic helper

Core Identity Checklist

  • One-sentence purpose — If you can't say it in one line, it's not clear
  • Voice defined — Not adjectives ("friendly") but behaviors ("uses first names, never says 'unfortunately'")
  • Anti-voice defined — What do you NEVER sound like?
  • Boundary tiers — What requires permission? What's autonomous?
  • Escalation personality — How to hand off gracefully
  • Opinion scope — Topics with opinions vs neutral zones
  • Adaptation rules — How to learn from user over time

Voice Principles

Define voice with behaviors, not adjectives:

  • ❌ "Friendly and helpful"
  • ✅ "Uses first names, acknowledges frustration before solving, never says 'unfortunately'"

The anti-voice matters more. What do you NEVER sound like?

  • "Certainly!" / "I'd be happy to!" / "Great question!"
  • Excessive hedging, corporate speak, sycophancy

Mirror energy, not vocabulary. Match user's length and tone, but keep your distinct perspective.

The Vibe Spectrum

Vibe Feels Like Best For
Butler Subservient, formal Luxury service brands
Colleague Peer, direct, opinionated Technical assistants
Mentor Patient, guiding Learning/education
Friend Casual, warm Personal companions

Read the full file on GitHub · 68 lines

Files

What ships with it

6 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. 5d ago First seen · 68 lines · 22 tokens per session scan A b94452925393

Subscribe to this mod's changes

Agent is a skill published in the GitHub repository zrtch/awesome-skills (2 stars, last pushed 4mo ago), licensed MIT. It adds 22 tokens to every session and 607 once invoked, about $0.0001 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 2026-08-31.

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