Collaborative Brainstorming Structured ideation using the Double Diamond model, grounded in persistent memory. Mined from 100+ real brainstorming sessions across production projects. Core insight: AI excels at divergent phases (volume, cross-domain connections). Humans excel at convergent phases (judgment, selection). Separating the two, and using Sibyl to avoid re-exploring solved problems, is the shape that consistently produces useful brainstorms. How to read this skill: the phases below describe the natural rhythm of a good brainstorm, not a procedure to march through. Skip phases that do…