whiteboard

Real-time multiplayer concurrency architecture - always-on invariants (version-aware undo, locking leases, socket preemption, optimistic UI, core/network isolation) plus scale-hardening topics deferred from MVPs (UDP channels, TURN, binary frames, delta patches, compression, sticky sessions, timing wheels) with the explicit triggers that graduate each one. Load when designing or extending multiplayer sync, or when deciding whether an MVP has outgrown WS-only JSON on one server instance.

Archive a completed or abandoned plan for future reference

Create a new plan folder with a plan.md template

Critique the user's plan from plan.md

Execute the user's plan that has been iteratively refined