Iteration is one of the key components in any creative process. Increasingly, creators like designers, developers, and writers adopt online community knowledge to iterate on their work. This community knowledge— from simple design examples to complex GenAIs trained on a community’s existing data—has the potential to boost creativity. However, the existing platforms that present this community knowledge are mostly designed for showcasing, rather than for sparking creative thinking or reflecting on users’ own work for further improvement. We apply a mixed methods approach to investigate how users build on this community knowledge (e.g., via example repositories, the Internet, LLMs, etc.) and based on these insights, we develop AI-empowered creativity support tools to help creators iterate on ideas. If you are interested in getting involved, send email to Tone Xu.