carbon: Skill for Claude Code

.claude/skills/carbon-docs/SKILL.md

carbon-docs is a skill for Claude Code from crbnos/carbon. It costs 128 tokens per session (6,239 once invoked), scanned A, original, no licence file.

A workflow for writing and changing Carbon's documentation website, which is built with Fumadocs and Next.js.

In plain words
What is it for?
It helps add or edit guide chapters, reference pages, documentation structure, and feature explanations.
Why use it?
It keeps reader-facing documentation changes aligned with the site's structure and publishing conventions.

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/carbon-docs/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 carbon-docs

README.md
[![agentmods](https://agentmods.dev/badge/skills/crbnos/carbon/carbon-docs.svg)](https://agentmods.dev/skills/crbnos/carbon/carbon-docs)
Your own site
<a href="https://agentmods.dev/skills/crbnos/carbon/carbon-docs"><img src="https://agentmods.dev/badge/skills/crbnos/carbon/carbon-docs.svg" alt="Measured on agentmods" height="20"></a>
Per session 128 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,239 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 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 $0.00128 $0.06239
Opus 5 $0.00064 $0.03120
Sonnet 5 $0.00026 $0.01248
Haiku 4.5 $0.00013 $0.00624

Measured 7d ago against content hash f0c8d7b5437d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

carbon-docs 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 7d 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.

curl -sS -X GET http://localhost:3002/docs/<slug> | grep -o "your new heading" # confirm it rendered
.claude/skills/carbon-docs/SKILL.md · 316 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. 7d ago First seen · 316 lines · 128 tokens per session scan A f0c8d7b5437d

Subscribe to this mod's changes

carbon-docs is a skill published in the GitHub repository crbnos/carbon (2,394 stars, last pushed today), with no licence file. It adds 128 tokens to every session and 6,239 once invoked, about $0.0006 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 2026-08-30.

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