Request cancellation or replay an ended observation
A queued job cancels atomically before execution claims it. An active job receives the run-scoped cancellation signal and returns 202 until its execution owner settles: the result may be success, failure or cancellation. The grace is fixed at 5 seconds from the signal: a run that has not reached a wave boundary and settled by then is dropped and the job settles interrupted, never an invented cancellation. A task still inside one long step when the signal arrives (an agent turn, a long wait) typically outlasts the grace. A paused or final observation returns its existing result unchanged.
POST
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v1
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jobs
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{id}
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cancel
Request cancellation or replay an ended observation
queued and running: the resident owns the execution. interrupted: execution ownership was lost and effect settlement is unknown — an EVIDENCE state (the journal is INCOMPLETE), never a run state (ADR-129). paused, succeeded, failed and cancelled: the run's own settlement, the words its terminal frame carries (ADR-128).
Reported journal delivery loss, independent of execution status. The reason classifies the mirror's first error without exposing OS text or paths. Absence is not a claim that a journal exists.
The run's settlement (ADR-128), built once by the runtime and projected whole: the state word every door speaks, why, the elapsed time on the kernel clock, the task tally, the spend with its qualifier, the failure named. Unknown cost is never zero: total_cost_usd is absent when nothing was metered. Present on the terminal event and durable job response of a job whose runtime settled; absent when the resident lost the execution (interrupted) or refused it before any task. Reattachment and idempotent admission replay project the same hash-bound terminal event, never a new settlement.
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