assumption-validator

Identify and classify assumptions in decisions, strategies, and plans into a RISK-ASSESSMENT artifact.

2|1|Updated Jan 31, 2026
One-click install
npx skills add https://github.com/Agentient/vibekit --skill assumption-validator
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: assumption-validator
Source: https://github.com/Agentient/vibekit/tree/main/plugins/evaluation-tools/skills/assumption-validator
Command: npx skills add https://github.com/Agentient/vibekit --skill assumption-validator

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Assumption Validator helps teams surface, classify, and stress-test hidden assumptions in decisions, strategies, and plans, turning uncertainty into a structured risk view.

Core Features & Use Cases

  • Surface explicit, implicit, and structural assumptions
  • Classify, prioritize, and validate load-bearing assumptions
  • Generate RISK-ASSESSMENT artifacts (CONTRACT-08), Assumption Inventory, and Sensitivity Analysis
  • Perform counterfactual analysis and confidence calibration to inform go/no-go decisions
  • Use in pre-commitment reviews, architecture decisions, product strategy, and due-diligence contexts

Quick Start

Run an assumption validation pass on a subject document to surface explicit and implicit assumptions, then generate a risk assessment.

Frequently Asked Questions about assumption-validator

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I identify hidden assumptions in an architecture decision record?

Assumption validation surfaces explicit, implicit, and structural assumptions in architecture decisions by classifying load-bearing bets and transforming them into a structured risk assessment artifact. It analyzes dependency mapping and confidence calibration to reveal hidden risks.

What is counterfactual analysis and how does it apply to risk assessment?

Counterfactual analysis in risk assessment evaluates alternative scenarios by stress-testing assumptions to measure sensitivity. It reveals how varying inputs affect decision outcomes, producing a sensitivity analysis that calibrates confidence for go/no-go commitments.

How do I validate assumptions before committing to a product strategy?

Run an assumption validation pass on your product strategy to classify and prioritize load-bearing assumptions. The process generates an Assumption Inventory and risk list, leveraging evidence gathering to inform pre-commitment reviews and due-diligence contexts.

Can I use assumption validation for investment due diligence?

Yes, assumption validation applies to investment due-diligence contexts by surfacing structural assumptions and mapping dependencies. It produces a RISK-ASSESSMENT artifact with confidence calibration, directly informing go/no-go investment decisions.

What is the best way to stress-test load-bearing assumptions in a plan?

The best way to stress-test load-bearing assumptions is through counterfactual analysis and sensitivity testing. This process classifies assumptions by priority, maps dependencies, and calibrates confidence levels to reveal structural risks in plans.

When should I not rely on assumption validation?

Assumption validation may be less effective when a plan lacks documented evidence or clear dependency mapping. The process relies on calibrating confidence against gathered evidence, so decisions with zero supporting documentation yield limited risk assessment value.