SynchLearn is a community learning platform built on Trace Pedagogy: a research-backed framework that keeps human thinking visible and valuable in the age of generative AI. Learners build collective intelligence through peer-readable contributions called metamarks, structured peer review, and AI-transparent submissions. Designed for higher education and professional learning, SynchLearn turns every cohort into a self-organizing knowledge community where authentic effort, not AI output, drives growth.