Excalidraw

This prevents your main agent from wasting 4k-22k tokens reading verbose Excalidraw JSON files by delegating all diagram operations to subagents. Triggers automatically when you work with .excalidraw files or mention flowcharts and architecture diagrams. The problem is that Excalidraw files have terrible signal-to-noise ratios (a 79-element diagram is 22k tokens, mostly positioning and styling metadata, with actual content being maybe 10%). Without this, reading seven project diagrams burns 33% of your context budget. With delegation, subagents handle the JSON parsing and return compact text summaries, saving around 97% of tokens while keeping your main context clean for actual work.