Collaborate in Nereid Mermaid sessions via MCP using AST-first, probe-refine workflows for sequence, flowchart, class, entity-relationship, and Gantt diagrams, plus xrefs, routes, and walkthroughs. Use when exploring or editing diagrams with a human watching live in TUI, and when coordinating attention through `attention_*`, `follow_ai_*`, and `selection_*`.
2026-07-10