Notes

• Tasks use setjmp/longjmp for stack-based coroutines (not KOS threads). Zero context switch overhead.
• Async I/O creates a KOS thd_worker internally — disc reads happen on a real thread, completion is polled by the scheduler.
• Frame budget prevents tasks from starving the render loop. Measured via perf_cntr_timer_ns().
• 16 concurrent tasks is generous. Typical: disc streamer + AI ticker + scene loader = 3.

Spec 7: Asset Manager (shachi/asset_mgr.h)

Problem

DC has 16MB main RAM + 8MB VRAM. Every texture, mesh, and sound must be tracked. When a scene unloads, its assets must be freed. When assets are shared across scenes, they must be ref-counted.