Head to head, rubric v2.3.0
Stance is 4 points more agent-ready than Darntough (75/100 against 71/100). Both scores come from public HTTP responses only.
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Share of each check group passed
Machine access
Stance 100%
Darntough 100%
Content legibility
Stance 81%
Darntough 85%
Discovery surface
Stance 65%
Darntough 65%
Identity & policy
Stance 58%
Darntough 17%
Agent-facing performance
Stance 75%
Darntough 75%
Agent protocols
Stance 40%
Darntough 40%
Catalogue access
Stance 100%
Darntough 100%
Product data legibility
Stance 67%
Darntough 90%
Agent-commerce protocols
Stance 20%
Darntough 40%
Checkout traversability
Stance 73%
Darntough 60%
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