Park agent-native IPC/sharing/introspection exploration (work item, PARKED); adopt five D-011 boundary constraints as packet addendum (operator-directed, negative constraints only — no new laws, no qualification claim; positive laws deferred to future D-016). Grounded in verified prior art (kernel + runtime families), executed experiments E1 (channel carriage composition, 11/11) and E2 (semantic reclamation safety, 0 vs 13 violations), with corrected counterarguments. master