OptionalexecutionOptionalloggerOptionalpubsubThe host Durable Object's single pubsub identity from do-runner/pubsub.ts, threaded here by init() alongside storage so a host that configures it reaches the runtime with no host change.
Passed to core at workflow.createRun({ runId, pubsub }) and to Mastra
at construction. The pubsub getter exposes the held identity so an
agent runner sharing this isolate uses the same feed. When absent, core
defaults a fresh emitter per run.
OptionalrequestConsulted on every start/resume — see RequestContextProvider.
OptionalstartThe deployment's start reservations (start-idempotency.ts). The runtime neither creates nor claims one — the surfaces above it do — but it owns the terminal reconcile that marks a key spent.
A reservation that never settles is not a correctness bug (replay still answers from the snapshot) but it never leaves the drain inventory and never becomes purgeable, so a deployment would eventually be unable to prove itself empty.
Absent ⇒ no reconcile.
The deployment execution fence (execution-fence.ts), consulted on EVERY start and resume. THIS is the closure guarantee for runs: a check here cannot be routed around by a surface that forgot to gate itself.
Absent ⇒ unfenced.