Marble Open-Sources a 1,590-Node Prerequisite Graph of Everything Kids Learn in Primary School

GitHub·low signal

withmarbleapp/os-taxonomy (created 2026-07-08) collected 3,181 stars in eight days — ~397/day with 548 forks — for pure JSON with no runtime dependencies. Marble (Generative Spark, Inc.) published 1,590 teachable micro-topics across eight subjects wired together by 3,221 prerequisite dependency edges forming a DAG, aligned to NGSS, Common Core, and the UK National Curriculum, plus 183 parent-friendly domain summaries. Dual-licensed ODbL 1.0 for the database structure and CC BY-SA 4.0 for authored content: commercial use is permitted with attribution, but derivative databases must stay open. The builder angle is the shape, not the subject — a hand-curated, dependency-ordered concept DAG is exactly the scaffold agent curricula and eval suites keep improvising badly.