Even if the Execution Boundary is positioned near the OS / Kernel, the OS itself does not make Governance Decisions. The upstream AI / Agent System forms the Decision, while the downstream OS / Kernel verifies and enforces the Decision and its execution conditions.

In other words, Decision Authority and Enforcement Responsibility are intentionally separated.

Within the AI / Agent System, Governance Decisions are formed based on Fact, Evaluation, Policy, Authority, Context, and other relevant elements. This involves Governance judgment, including semantic interpretation, Policy application, and contextual assessment.

The Execution Boundary, by contrast, does not repeat that judgment. It compares the upstream Decision and execution conditions with the actual Execution Request. If the required conditions are satisfied, Execution proceeds; if they are not, it does not.

Verification by the OS / Kernel is therefore not a new semantic judgment. For example, if Allow conditions specify a particular Actor, Target, Scope, and Action, the Boundary verifies whether the actual Execution Request matches those conditions. It does not reinterpret Policy or reassess the Action.

If both upstream and downstream components independently made Governance Decisions, Decision Authority would be duplicated, making the authoritative Decision and responsibility for it unclear. This would affect not only technical complexity, but also Decision reconstruction for Audit, Accountability, Liability, and Insurability.

When an incident or violation occurs, it must be possible to distinguish who made the Decision from who enforced it.

Governance OS therefore adopts the following principle:

Decision Authority ≠ Enforcement Responsibility

The Execution Boundary is not a second Governance Decision Engine. The OS / Kernel does not reinterpret Governance. It is a Layer that verifies and enforces an already formed Decision and its execution conditions at Runtime.

Verify, not re-decide.

This separation preserves the meaning and responsibility of the Governance Decision upstream while allowing Execution to be controlled deterministically downstream.