What do I need to use Carbon Accounting Check?

Inventory data; Organizational boundary; Scope 2 method(s); Emission factor sources; Data provenance; Prior-year inventory (optional); Offsets or removals held (optional).

Is Carbon Accounting Check free to use?

Yes — run it free in the browser playground (no API key needed for the sponsored trial, or bring any provider key), or install it into Claude Code, Cursor, ChatGPT and more via npx pm-claude-skills. MIT-licensed and open source.

Carbon Accounting Check

Q: How do I know the Carbon Accounting Check output is good?

The skill verifies itself against its own quality checks: Consolidation approach is stated and every in/out entity decision is visible; All 15 scope 3 categories are screened; exclusions have a reason and a size estimate; Both scope 2 methods are reported, or the absence of one is flagged; Every material source has a data-quality tier; the share of total per tier is stated.

🔵 Stable🕐 updated 2026-07-14 🔷 SkillSpec L3 pm-climate

Sanity-check a greenhouse gas inventory before it goes into a report or gets audited. Use when asked to review a carbon footprint, check a GHG inventory, validate scope 1/2/3 numbers, explain a year-over-year emissions change, or prepare emissions data for assurance. Produces a boundary review, data-quality assessment, emission-factor sensitivity list, YoY bridge, and a fix-before-publishing list.

▶ Run it free — no key needed 📝 Grade your existing draft View SKILL.md ↗

What to give it

▸Inventory data — emissions by scope and category, with units (tCO2e), and the reporting year

▸Organizational boundary — operational control, financial control, or equity share, and which entities are in/out

▸Scope 2 method(s) — location-based, market-based, or both; contractual instruments held (RECs, GOs, PPAs)

▸Emission factor sources — which factor sets and vintages were used per category

▸Data provenance — per major source: meter/invoice, activity-data calculation, estimate, or spend-based proxy

▸Prior-year inventory (optional) — (optional) — needed for the YoY bridge

▸Offsets or removals held (optional) — (optional) — reviewed separately, never netted

✅ The bar it holds itself to

Every skill in this library self-verifies — these are this skill's own quality checks, straight from its definition.

✓Consolidation approach is stated and every in/out entity decision is visible

✓All 15 scope 3 categories are screened; exclusions have a reason and a size estimate

✓Both scope 2 methods are reported, or the absence of one is flagged

✓Every material source has a data-quality tier; the share of total per tier is stated

✓The YoY bridge separates real activity change from methodology and boundary effects

✓Each flag has a severity and a concrete fix, not just an observation

✓Assumptions made from a thin brief are labelled as assumptions

⚠️ What it refuses to do

Do not net offsets or removals against gross emissions in the headline number — report gross, then offsets separately

Do not present a market-based scope 2 figure without naming the contractual instruments behind it

Do not let a YoY "reduction" stand if it is driven by a factor-vintage update or boundary change — say so

Do not treat spend-based proxy data as if it supports precise claims — flag it as directional

Do not silently drop scope 3 categories — every exclusion needs a reason and a size estimate

Install

npx pm-claude-skills add --agent claude   # or codex · cursor · gemini · hermes
# or one-line MCP (every skill, any client):
claude mcp add pm-skills -- npx -y pm-claude-skills-mcp

Related skills

🔌 Embed this skill

Drop this on your blog, docs, or site — it renders a "Run this skill" card:

<div data-pm-skill="carbon-accounting-check"></div>
<script src="https://mohitagw15856.github.io/pm-claude-skills/embed.js" async></script>

💬 Discussion

Carbon Accounting Check is one of 599 open-source professional AI agent skills — all SkillSpec L3. Try them all in the browser · ⭐ Star on GitHub · Browse the full catalog