Status: IN
SRP's operational precision derives specifically from its actor-based framing: without the actor concept, "one reason to change" is ambiguous, but identifying the distinct actors (roles) a module serves makes responsibilities discrete and testable — even when one person fills multiple roles, those are distinct change-pressure sources.
The actor framing is what transforms SRP from a vague guideline into a precise design constraint; the emergent insight is which component provides the precision
Depends on (SL): srp-actor-based-not-technical, srp-responsibility-means-one-reason-to-change, srp-canonical-definition