Excel Assumption Registry AI - Document & Optimize Models

Excel Assumption Registry AI - Document & Optimize Models

The Excel Assumption Registry AI skill assists in the creation of a structured assumption register for any Excel model. It includes columns for assumption name, category, base value, source, Bull/Bear values, sensitivity rank, and ownership, along with a formula for calculating the sensitivity rank from Data Table outputs.

What this skill does

• Defines what constitutes a "material assumption" based on sensitivity, uncertainty, and contractual certainty.
• Creates a dedicated 'Assumptions' tab in Excel, listing every material assumption in the model.
• Documents each assumption with its name, category, base value, source and rationale, Bull/Bear values, sensitivity rank, and owner.
• Includes a flag system for monitoring assumptions that require active attention.
• Provides a formula for computing sensitivity rank using Data Table outputs.

Who it is for

This skill is designed for developers and teams using AI coding agents like Claude Code, Cursor, and Codex, particularly those involved in financial modeling, auditing, and decision support systems.

Use cases

• Documenting a completed Excel model for handover or review.
• Preparing a model for formal approval in capital allocation decisions.
• Ensuring auditability and traceability of assumptions in business case evaluations.
• Facilitating updates by multiple users over time with a clear record of assumptions.

Technical details

The Excel Assumption Registry AI skill leverages capabilities like agent-skills, aiapplication, and the assumption-registry-builder to enhance Excel's functionality. It integrates seamlessly with AI coding agents such as Claude Code, Cursor, and Codex.

This provides general workflow assistance only and is not legal, tax, accounting or financial advice.

Source & Licence

This package is built on open-source work published by andreworia (andreworia/claude-excel-skills) and distributed under MIT. The original licence text and copyright notice are included in your download.

Personal and commercial use, modification and redistribution are permitted, provided the original copyright and licence notice are retained.

Your purchase covers curation, licence verification, packaging, documentation and instant delivery. It does not grant exclusive rights to the underlying open-source code, which remains available under its original licence.

Delivery & Support

• Delivery: instant — a secure download link is emailed to you as soon as payment is confirmed.
• Format: ZIP archive containing the skill files, documentation and the original licence.
• Support: support@mcpcart.com — we aim to reply within 2 business days.
• Updates: updates are included only where stated on this page.

Refunds

This is a digital product delivered immediately after purchase. By completing your order you request immediate delivery and acknowledge that, once the download has been accessed, the statutory right to cancel no longer applies to the extent permitted by law. Refund requests are handled in accordance with our published Refund Policy.

Claude, Codex, Gemini and Cursor are trademarks of their respective owners. MCP Cart is an independent marketplace and is not affiliated with, endorsed by, or sponsored by any of them. Compatibility references describe interoperability only.