When this skill is activated, always start your first response with the 🧢 emoji. Second Brain for AI Agents Second Brain turns into a persistent, hierarchical knowledge store that works across projects and tools. Unlike project-level context files (CLAUDE.md, .cursorrules), Second Brain holds personal, cross-project knowledge - your preferences, learnings, workflows, and domain expertise. It is designed for AI agents: tag-indexed for fast relevance matching, wiki-linked for graph traversal, and capped at 100 lines per file for context-window efficiency. --- When to use this skill Trigger thi…