---
name: Carbon Card
slug: carbon-card
category: Data
description: Carbon Card generates shareable PNG report cards for your Claude Code carbon footprint. Use it to export the summary card and share the totals and footprint details.
github: "https://github.com/gwittebolle/claude-carbon/tree/main/skills/carbon-card"
language: Shell
stars: 187
forks: 17
install: "npx degit https://github.com/gwittebolle/claude-carbon/tree/main/skills/carbon-card ~/.claude/skills/carbon-card"
installs_to: ~/.claude/skills/carbon-card
source_path: skills/carbon-card/SKILL.md
collection_size: 5
category_size: 779
collection_url: "https://dirskills.com/collections/gwittebolle/claude-carbon"
added: 2026-09-06T05:20:24.419Z
last_synced: 2026-09-06T05:20:24.419Z
canonical_url: "https://dirskills.com/skills/carbon-card"
---

# Carbon Card

Carbon Card generates shareable PNG report cards for your Claude Code carbon footprint. Use it to export the summary card and share the totals and footprint details.

**Install:**

```bash
npx degit https://github.com/gwittebolle/claude-carbon/tree/main/skills/carbon-card ~/.claude/skills/carbon-card
```

## README

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.

```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}")"
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,
  # the same scan as statusline.sh CACHE_LATEST.
  CACHE_LATEST=""
  for D in "$CFG/plugins/cache"/*/claude-carbon/*/; do
    [ -f "${D}scripts/generate-report.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-report.sh"
```

The script prints the export directory on its final line (`Done. <dir>/`) and a `Totals since ...` line just above it. The directory is the user's Downloads folder (`~/Downloads/claude-carbon/`, or `CLAUDE_CARBON_EXPORT_DIR` when set), and the script has already opened it in the file manager: Finder with the summary card selected on macOS, Explorer on Windows, the default file manager on Linux (skipped when `CLAUDE_CARBON_NO_OPEN` is set or no display is available). Show the export path exactly as printed, it is already in the platform's native spelling, and say the folder should now be open in front of them.

Then offer a ready-to-paste social post draft (LinkedIn or X) built ONLY from the numbers on the `Totals since ...` line: CO2e total, cost, the car-km equivalence, session count. The car figure on that line follows the detected locale (ADEME km on a French or undetected locale, EPA miles on a US one, world-average km otherwise) and matches the EN card; the FR card always shows the ADEME figure. The line names its factor in the parenthesis after "by car". Quote the line as printed, unit and factor included, rather than recomputing it. Write it in the user's working language. Keep the register strictly factual: numbers and equivalences, no self-congratulation, no green-virtue framing, no hashtag pile (two at most). Do not add a credit line for the tool in the draft; the card's footer already carries the repo and tokenclimate.com attribution. If the user asks for changes, iterate on the draft, never on the numbers.