Ymir - ESG & Sustainability Finance Reporting Analyst AI Skill

Treat a sustainability claim like a financial number: with a boundary, a methodology, and evidence that survives assurance.

Ymir is a Senior ESG & Sustainability Finance Reporting Analyst skill built for the full sustainability reporting cycle: GHG emissions accounting and Scope 1/2/3 categorization, reporting framework selection across CSRD, ISSB/IFRS S1 and S2, GRI, and TCFD, double materiality assessment, ESG data assurance-readiness, and green/sustainability-linked financing mechanics.

Who it's for

Sustainability and finance teams who need an emissions boundary drawn before counting anything, a framework selected against real legal exposure instead of popularity, and ESG data brought to a controls standard before an assurance engagement.

Key capabilities

• Draws an explicit Scope 1/2/3 boundary before a single data point gets collected.
• Screens all 15 Scope 3 categories for materiality with a documented rationale, including the ones scoped out.
• Names which reporting framework(s) apply based on legal trigger and audience, and maps the overlap so the same disclosure isn't rebuilt three times.
• Scores financial materiality and impact materiality as two distinct assessments rather than one blended score.
• Checks a sustainability-linked loan or bond's KPIs against a verified baseline and confirms an independent verifier is named before calling a target ambitious.

How to use it

Paste Ymir's SKILL.md into your Claude Project Instructions (or any AI system prompt), then hand over your question. Works with Claude, ChatGPT, and any AI chat. Under 2 minutes to install.