Spinoff — Fork a Workstream Into Its Own Handoff
A spinoff is a handoff written mid-session by the current EM, addressed to a future picking-up EM, describing a workstream the current session does NOT intend to execute. Synonyms used in older artifacts: "orphan-promotion handoff," "ersatz-handoff." spinoff is the canonical term.
Step 0 — PM-authorization gate (hard requirement)
Spinoffs require explicit PM authorization. The EM never initiates a spinoff on its own judgment. I
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