Diagram Design
cathrynlavery/diagram-design
Creates branded diagrams, from architecture, flowchart and sequence to charts and maps, as self-contained HTML with inline SVG, with import from draw.io, Mermaid and Excalidraw.
Generate a shields.io badge of your Claude Code carbon footprint for your READMEs
Install Carbon Badge
$ npx skills add gwittebolle/claude-carbon --skill carbon-badge -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install gwittebolle/claude-carbon carbon-badge --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/gwittebolle/claude-carbon.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/carbon-badge .claude/skills/carbon-badge && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "carbon-badge" agent skill from https://github.com/gwittebolle/claude-carbon/tree/main/skills/carbon-badge into .claude/skills/carbon-badge/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "carbon-badge", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/gwittebolle/claude-carbon/tree/main/skills/carbon-badgeType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add gwittebolle/claude-carbon --skill carbon-badge -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install gwittebolle/claude-carbon carbon-badge --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/gwittebolle/claude-carbon.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/carbon-badge .agents/skills/carbon-badge && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "carbon-badge" agent skill from https://github.com/gwittebolle/claude-carbon/tree/main/skills/carbon-badge into .agents/skills/carbon-badge/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "carbon-badge", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add gwittebolle/claude-carbon --skill carbon-badge -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install gwittebolle/claude-carbon carbon-badge --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/gwittebolle/claude-carbon.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/carbon-badge .cursor/skills/carbon-badge && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "carbon-badge" agent skill from https://github.com/gwittebolle/claude-carbon/tree/main/skills/carbon-badge into .cursor/skills/carbon-badge/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "carbon-badge", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/gwittebolle/claude-carbon.git --path skills/carbon-badge--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add gwittebolle/claude-carbon --skill carbon-badge -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install gwittebolle/claude-carbon carbon-badge --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/gwittebolle/claude-carbon.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/carbon-badge .gemini/skills/carbon-badge && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "carbon-badge" agent skill from https://github.com/gwittebolle/claude-carbon/tree/main/skills/carbon-badge into .gemini/skills/carbon-badge/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "carbon-badge", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install gwittebolle/claude-carbon carbon-badgeInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add gwittebolle/claude-carbon --skill carbon-badge -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/gwittebolle/claude-carbon.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/carbon-badge .github/skills/carbon-badge && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "carbon-badge" agent skill from https://github.com/gwittebolle/claude-carbon/tree/main/skills/carbon-badge into .github/skills/carbon-badge/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "carbon-badge", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add gwittebolle/claude-carbon --skill carbon-badge -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install gwittebolle/claude-carbon carbon-badge --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/gwittebolle/claude-carbon.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/carbon-badge .opencode/skills/carbon-badge && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "carbon-badge" agent skill from https://github.com/gwittebolle/claude-carbon/tree/main/skills/carbon-badge into .opencode/skills/carbon-badge/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "carbon-badge", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
carbon-badge- GitHub stars
- 211
- Token cost
- ~712 tokens
- SKILL.md length
- 119 words
- Files
- 1
- Skills in repo
- 4
- Repo updated
- First seen
- Licence
- MIT
At a glance
Generate a shields.io badge of your Claude Code carbon footprint for your READMEs
- Tasks that involve Technical documentation
- Calls jq and bash
What it does
Carbon Badge is an agent skill from gwittebolle/claude-carbon. Generate a shields.io badge of your Claude Code carbon footprint for your READMEs
Its SKILL.md is about 710 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Development, covering Technical documentation. The repository describes itself as: claude-carbon: track the carbon footprint of your Claude Code sessions. The licence is MIT.
When your agent uses it
- Tasks that involve Technical documentation
Example prompts
- “/carbon-badge”
What it can do on your machine
Read from SKILL.md and the folder at commit d7313ff. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
jqbash
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Carbon Badge loads about 712 tokens when it runs. Until then it costs about 24 tokens; SKILL.md has 119 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from gwittebolle/claude-carbon at commit d7313ff, republished under its MIT licence (© gwittebolle). 119 words, ~712 tokens.
Download SKILL.mdSave it as
.claude/skills/carbon-badge/SKILL.md (or your agent's skills folder).- name
- carbon-badge
- description
- Generate a shields.io badge of your Claude Code carbon footprint for your READMEs
Run the following bash script and present the output to the user.
#!/usr/bin/env bash
# Locate the install wired into the status line (honours CLAUDE_CONFIG_DIR),
# then fall back to CLAUDE_PLUGIN_ROOT / CLAUDE_CARBON_DIR / the default path.
# Windows (Git Bash): CLAUDE_* variables and the paths stored in settings.json can
# arrive in the native "C:\Users\..." spelling, which bash cannot open. cygpath
# ships with Git for Windows; everywhere else this is the identity function.
ccp() {
case "${OSTYPE:-}" in msys*|cygwin*) ;; *) printf '%s' "$1"; return 0 ;; esac
case "$1" in
[A-Za-z]:[\\/]*|*\\*) cygpath -u "$1" 2>/dev/null || printf '%s' "$1" ;;
*) printf '%s' "$1" ;;
esac
}
CFG="$(ccp "${CLAUDE_CONFIG_DIR:-$HOME/.claude}")"
REPO_DIR=""
if command -v jq >/dev/null 2>&1 && [ -f "$CFG/settings.json" ]; then
SL_CMD="$(jq -r '.statusLine.command // empty' "$CFG/settings.json" 2>/dev/null)"
# statusLine.command stores a shell-escaped path: expand ~ and unescape spaces
SL_CMD="${SL_CMD//\\ / }"; SL_CMD="${SL_CMD/#\~/$HOME}"; SL_CMD="$(ccp "$SL_CMD")"
[ -n "$SL_CMD" ] && [ -f "$SL_CMD" ] && REPO_DIR="$(cd "$(dirname "$SL_CMD")/.." 2>/dev/null && pwd)"
fi
[ -z "$REPO_DIR" ] && [ -n "${CLAUDE_PLUGIN_ROOT:-}" ] && REPO_DIR="$(ccp "$CLAUDE_PLUGIN_ROOT")"
[ -z "$REPO_DIR" ] && [ -n "${CLAUDE_CARBON_DIR:-}" ] && REPO_DIR="$(ccp "$CLAUDE_CARBON_DIR")"
if [ -z "$REPO_DIR" ]; then
# Pure marketplace installs reach here: no statusLine.command in settings.json and
# no CLAUDE_PLUGIN_ROOT in a skill's bash env. Pick the newest cached plugin copy,
# keeping only candidates that ship the badge script.
CACHE_LATEST=""
for D in "$CFG/plugins/cache"/*/claude-carbon/*/; do
[ -f "${D}scripts/generate-badge.sh" ] || continue
if [ -z "$CACHE_LATEST" ] || [ "$(printf '%s\n%s\n' "$CACHE_LATEST" "$D" | sort -V | tail -1)" = "$D" ]; then
CACHE_LATEST="$D"
fi
done
[ -n "$CACHE_LATEST" ] && REPO_DIR="${CACHE_LATEST%/}"
fi
[ -z "$REPO_DIR" ] && REPO_DIR="$HOME/code/claude-carbon"
bash "$REPO_DIR/scripts/generate-badge.sh"The script prints a ready-to-paste markdown snippet, the raw badge URL and a short note on where the badge belongs. Show all of it exactly as printed — never recompute, reformat or re-escape the number, the month or the URL. The badge is one developer's total, dated with the month it was generated, and it links to the methodology. It belongs in the user's profile README or a personal project, not in a team or organisation repository. The badge is a static image, so re-running /carbon-badge is how they refresh the figure and its month.
If the script is missing (an install that predates the badge), suggest /carbon-update.
© gwittebolle, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/carbon-badge of gwittebolle/claude-carbon.
Open the folder on GitHubat commit d7313ff
Compare with similar skills
Carbon Badge next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Carbon Badge this skillgwittebolle/claude-carbon | 211 | — | ~712 | Automated safety check: Pass | MIT | |
| Diagram Designcathrynlavery/diagram-design | 49k | 1 repos | ~7.6k | Automated safety check: Pass | MIT | |
| Simple Englishmoeru-ai/airi | 50k | 2 repos | ~4.6k | Automated safety check: Pass | MIT | |
| Doc SyncJetBrains/ideavim | 10k | 2 repos | ~2.6k | Automated safety check: Pass | MIT | |
| Mailspring App ScreenshotsFoundry376/Mailspring | 18k | — | ~1.5k | Automated safety check: Pass | GPL-3.0 | |
| Draw.io Diagram StudioAgents365-ai/drawio-skill | 10k | — | ~2.4k | Automated safety check: Notes | MIT |
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More from gwittebolle/claude-carbon
Carbon Card
gwittebolle/claude-carbon
Generate shareable PNG report cards of your Claude Code carbon footprint
Carbon PR
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Post the development footprint of the current branch as a sticky PR comment
Carbon Report
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Display CO2 emissions report for Claude Code sessions. An agent skill from gwittebolle/claude-carbon.
Related
Categories
Questions about Carbon Badge
What does Carbon Badge do?
Generate a shields.io badge of your Claude Code carbon footprint for your READMEs. Carbon Badge is an agent skill from gwittebolle/claude-carbon.
When should I use Carbon Badge?
Carbon Badge fits situations like: tasks that involve Technical documentation.
How do I install Carbon Badge in Claude Code?
Run `npx skills add gwittebolle/claude-carbon --skill carbon-badge -a claude-code`. Or copy the skill folder (skills/carbon-badge in gwittebolle/claude-carbon) into .claude/skills/carbon-badge in your project. Claude Code loads it when a task matches its description.
How do I install Carbon Badge in Codex?
Run `npx skills add gwittebolle/claude-carbon --skill carbon-badge -a codex`. Or copy the skill folder (skills/carbon-badge in gwittebolle/claude-carbon) into .agents/skills/carbon-badge in your project. Codex loads it when a task matches its description.
Can I use Carbon Badge in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add gwittebolle/claude-carbon --skill carbon-badge -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/carbon-badge, .gemini/skills/carbon-badge, .github/skills/carbon-badge and .opencode/skills/carbon-badge in your project.
What does Carbon Badge need to run?
Going by SKILL.md and its folder, Carbon Badge needs the command-line tools its instructions call (jq and bash).
Does Carbon Badge access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Carbon Badge safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Carbon Badge use?
Carbon Badge is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Carbon Badge use?
About 712 tokens (SKILL.md is roughly 2.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Carbon Badge?
Skills that share tags, products or a category with Carbon Badge: Diagram Design (cathrynlavery/diagram-design, 49k stars), Simple English (moeru-ai/airi, 50k stars), Doc Sync (JetBrains/ideavim, 10k stars) and Mailspring App Screenshots (Foundry376/Mailspring, 18k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Carbon Badge?
gwittebolle (a GitHub user) maintains it in gwittebolle/claude-carbon, which has 211 GitHub stars. The repository holds 4 skills in this directory. The repository was last updated on October 9, 2026.
Source: gwittebolle/claude-carbon on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.