Subscribe-callback frame — the moment a registered observer fires
during Phase G of a commit.
Remarks
Distinct from IRSubscribe (which is the registration
event); this variant is the invocation event. EPIC-2's
CommitFromSubscribe pass walks originEvent lineage on
IRCommit back to a callback frame to surface the row-1
cascading-commit anti-pattern. PR-B1 reserves the wire-format slot
but does not yet instrument the engine to emit these — adopters
see zero subscribe-callback events under PR-B1.
Subscribe-callback frame — the moment a registered observer fires during Phase G of a commit.
Remarks
Distinct from IRSubscribe (which is the registration event); this variant is the invocation event. EPIC-2's
CommitFromSubscribepass walksoriginEventlineage on IRCommit back to a callback frame to surface the row-1 cascading-commit anti-pattern. PR-B1 reserves the wire-format slot but does not yet instrument the engine to emit these — adopters see zerosubscribe-callbackevents under PR-B1.