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David Heinemeier Hansson—Created Ruby on Rails as open source, transforming web application development

David Heinemeier Hansson created Ruby on Rails in 2004 and released it as open source software. Rails became one of the most influential web frameworks, popularizing conventions like MVC architecture and 'convention over configuration.' It spawned an enormous open source ecosystem and was used to build early versions of Twitter, GitHub, Shopify, and Airbnb.

Scoring Impact

TopicDirectionRelevanceContribution
Open Source+towardprimary+1.00
Overall incident score =+0.750

Score = avg(topic contributions) × significance (high ×1.5) × confidence (0.50)

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