Ruby on Rails open-sourced July 2004 (DHH from Basecamp); v1.0 December 2005 — convention-over-configuration

Summary

Claim: Ruby on Rails was open-sourced in July 2004 by David Heinemeier Hansson, extracted from Basecamp. Version 1.0 shipped December 2005. Pioneered convention-over-configuration, ActiveRecord ORM, scaffolding — collapsing the boilerplate of building a web app.

Source: Wikipedia / Rails project history.

Confidence: Verified.

Why this matters for Candid: First-on-the-board entry in the "parts" timeline (Timeline 2004–2014: the decade when each of the three historically-expensive parts independently got cheap). Pair with [[hand-rolled-web-stack-pre-2004]] for the before-state.