@startuml
!include card-uml-style.iuml
scale 620 width
top to bottom direction

state "01  WorkerContext lifetime\nstatic initialization → program end" as ObjectLifetime

state "PREPARED" as Constructed
state "02  STARTING" as Starting
state "READY" as ReadyWrapper
state "03  RUNNING" as RunningWrapper
state "COMPLETED" as CompletedWrapper

state "Ready" as ReadyKernel
state "04  Running" as RunningKernel
state "05  time sliced\nA ↔ B" as TimeSlice
state "06  Deleted\ncontext remains static" as DeletedKernel

Constructed --> Starting : create_worker()
Starting --> ReadyWrapper : xTaskCreate = pdPASS
ReadyWrapper --> RunningWrapper : callback entry
RunningWrapper --> CompletedWrapper : result published

ReadyKernel --> RunningKernel : scheduler
RunningKernel --> ReadyKernel : preemption
RunningKernel --> TimeSlice : equal priority
TimeSlice --> RunningKernel : resume
RunningKernel --> DeletedKernel : vTaskDelete(NULL)

ObjectLifetime -[hidden]down-> Constructed
CompletedWrapper -[hidden]down-> DeletedKernel

note right of RunningWrapper
  trace_state is diagnostic application data.
  It is not eTaskState.
end note
@enduml