carbon: Skill for Claude Code

.claude/skills/create-agents-md/SKILL.md

create-agents-md is a skill for Claude Code from crbnos/carbon. It costs 86 tokens per session (1,225 once invoked), scanned A, original, no licence file.

A workflow for creating or updating an AGENTS.md file, which records how a software package or ERP module works for coding agents.

In plain words
What is it for?
It helps document new modules or packages and refresh existing guidance when the code or review process shows it is out of date.
Why use it?
It bases documentation on the actual source code, reducing the chance that agents rely on stale or unsupported instructions.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

This is crbnos/carbon's own configuration. It tells Claude Code how to work on carbon 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 carbon configures →

Reuse

Borrowing it

Nothing to install: this file belongs to crbnos/carbon. 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/crbnos/carbon/main/.claude/skills/create-agents-md/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/crbnos/carbon

Made for: Claude Code.

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 create-agents-md

README.md
[![agentmods](https://agentmods.dev/badge/skills/crbnos/carbon/create-agents-md/github.svg)](https://agentmods.dev/skills/crbnos/carbon/create-agents-md)
Your own site
<a href="https://agentmods.dev/skills/crbnos/carbon/create-agents-md"><img src="https://agentmods.dev/badge/skills/crbnos/carbon/create-agents-md/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 create-agents-md

Your own site · 80×15
<a href="https://agentmods.dev/skills/crbnos/carbon/create-agents-md"><img src="https://agentmods.dev/badge/skills/crbnos/carbon/create-agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 86 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,225 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Agent Snooping · line 48
    Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.
    Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
How audits are shown
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 $0.00086 $0.01225
Opus 5.5 $0.00034 $0.00490
Sonnet 5.5 $0.00017 $0.00245
Haiku 4.5 $0.00009 $0.00122

Measured 2mo ago against content hash c179edafec65, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

create-agents-md 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 2mo 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/create-agents-md/SKILL.md · 141 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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. 2mo ago First seen · 141 lines · 86 tokens per session scan A c179edafec65

Subscribe to this mod's changes

create-agents-md is a skill published in the GitHub repository crbnos/carbon (2,783 stars, last pushed today), with no licence file. It adds 86 tokens to every session and 1,225 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-08-30.

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