simplicity-audit

simplicity-audit is a skill for Claude Code, Codex from petekp/agent-skills. It costs 135 tokens per session (3,332 once invoked), scanned A, original, no licence file.

A first-principles review of a codebase that lists what the software actually does and examines whether each part of its complexity is necessary. First principles means evaluating the basics instead of accepting existing assumptions.

In plain words
What is it for?
It helps assess whether a codebase is overengineered, reduce complexity, and identify simpler designs.
Why use it?
It helps find unnecessary layers and overcomplicated design before simplifying the project.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit It helps assess whether a codebase is overengineered, reduce complexity, and identify simpler designs.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/petekp/agent-skills/simplicity-audit
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 petekp/agent-skills --skill simplicity-audit
Clone the repo
git clone --depth 1 https://github.com/petekp/agent-skills

Made for: Claude Code, Codex.

Its marketplace also offers this one on its own, as the plugin simplicity-audit/plugin install simplicity-audit after adding the marketplace above.

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 simplicity-audit

README.md
[![agentmods](https://agentmods.dev/badge/skills/petekp/agent-skills/simplicity-audit/github.svg)](https://agentmods.dev/skills/petekp/agent-skills/simplicity-audit)
Your own site
<a href="https://agentmods.dev/skills/petekp/agent-skills/simplicity-audit"><img src="https://agentmods.dev/badge/skills/petekp/agent-skills/simplicity-audit/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.

agentmods 80×15 button for simplicity-audit

Your own site · 80×15
<a href="https://agentmods.dev/skills/petekp/agent-skills/simplicity-audit"><img src="https://agentmods.dev/badge/skills/petekp/agent-skills/simplicity-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 135 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,332 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 unknown 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 $0.00135 $0.03332
Opus 5 $0.00068 $0.01666
Sonnet 5 $0.00027 $0.00666
Haiku 4.5 $0.00014 $0.00333

Measured 8d ago against content hash a98c4118a59b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

simplicity-audit 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 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.

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/simplicity-audit/SKILL.md · 245 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 8d ago First seen · 245 lines · 135 tokens per session scan A a98c4118a59b

Subscribe to this mod's changes

simplicity-audit is a skill published in the GitHub repository petekp/agent-skills (8 stars, last pushed 3mo ago), with no licence file. It adds 135 tokens to every session and 3,332 once invoked, about $0.0007 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.