# FC07 card plan

## Thesis

An ISR and a task use different APIs and different stacks. A FromISR operation
may unblock a higher-priority task, but the task runs immediately only if the
ISR explicitly requests a context switch.

## Evidence

The nine-record replay proves a real MEI cause, source clear before give,
`xHigherPriorityTaskWoken=pdTRUE`, distinct ISR/waiter/stimulus stack pointers,
and ordering `ISR → waiter → interrupted stimulus`.