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
Darntough 100%
Stance 100%
Content legibility
Darntough 85%
Stance 81%
Discovery surface
Darntough 65%
Stance 65%
Identity & policy
Darntough 17%
Stance 58%
Agent-facing performance
Darntough 75%
Stance 75%
Agent protocols
Darntough 40%
Stance 40%
Catalogue access
Darntough 100%
Stance 100%
Product data legibility
Darntough 90%
Stance 67%
Agent-commerce protocols
Darntough 20%
Stance 40%
Checkout traversability
Darntough 60%
Stance 73%
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