carbon-card SKILL.md skillA
carbon-card from gwittebolle/claude-carbon is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add gwittebolle/claude-carbon/carbon-card@git:20261021.f72ac38Pins git:20261021.f72ac38 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- gwittebolle/claude-carbon
- Path
skills/carbon-card/SKILL.md- Versions recorded
- 12
- Latest version
- git:20261021.f72ac38, committed Oct 21, 2026
- First version recorded
- Aug 18, 2026
- Size
- 5,224 bytes
- Repository stars
- 238
- License
- MIT
Generate shareable PNG report cards of your Claude Code carbon footprint.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
Run the following bash script and present the output to the user. Show the exported file paths so they can share the PNGs, and tell them the folder has been opened in their file manager. When no browser could draw them there are no PNGs: see the last paragraph.
```bash
#!/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}")"
# A jq the installer fetched into the data folder (a Mac older than macOS 15 has none)
if ! command -v jq >/dev/null 2>&1 && [ -x "$CFG/claude-carbon/bin/jq" ]; then PATH="$CFG/claude-carbon/bin:$PATH"; fi
REPO_DIR=""
…Read the whole file at its exact version.
How to install
mdr add gwittebolle/claude-carbon/carbon-card@sha256:1505e033ec5a40e6The line at the top of this page pins the label git:20261021.f72ac38, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_x7piq3mvzhnkkzwb)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 12 versions of this file, between Aug 18, 2026 and Oct 21, 2026, about one every 6 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261021.f72ac38 latest | 2026-10-21 | f72ac38 | 5,224 B | A | view · diff |
| git:20261015.8a5eab2 | 2026-10-15 | 8a5eab2 | 5,131 B | A | view · diff |
| git:20261015.a2e847f | 2026-10-15 | a2e847f | 4,798 B | A | view · diff |
| git:20261014.e67ecde | 2026-10-14 | e67ecde | 4,658 B | A | view · diff |
| git:20261012.9d8c696 | 2026-10-12 | 9d8c696 | 4,452 B | A | view · diff |
| git:20261012.15d473c | 2026-10-12 | 15d473c | 4,778 B | A | view · diff |
| git:20261012.db66413 | 2026-10-12 | db66413 | 4,705 B | A | view · diff |
| git:20260903.54a9245 | 2026-09-03 | 54a9245 | 3,865 B | A | view · diff |
| git:20260902.8b0a84f | 2026-09-02 | 8b0a84f | 3,364 B | A | view · diff |
| git:20260819.ba1823f | 2026-08-19 | ba1823f | 2,854 B | A | view · diff |
| git:20260819.47f21ec | 2026-08-19 | 47f21ec | 2,782 B | A | view · diff |
| git:20260818.3774557 | 2026-08-18 | 3774557 | 2,129 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (5224 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
gwittebolle/claude-carbon · 238 stars · license MIT · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_x7piq3mvzhnkkzwb GET https://markdownregistry.com/api/v1/resolve?ref=gwittebolle/claude-carbon/carbon-card GET https://markdownregistry.com/api/v1/blob/1505e033ec5a40e606a342aa235cc624a2a2deab6ca796fb0433464673a0d190
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.