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.