HSDD Reconcile: Apply Pending Governance Updates

Phase planning treats governance files as a frozen snapshot and emits intended changes as data: ## Governance updates (pending reconcile) sections in each node's plan file. This skill is the single writer that applies those effects at the root, with the human arbitrating anything two nodes disagree on.

Core principle: planning is a pure function of the governance snapshot; reconcile is the imperative shell. Effects are applied once, at the root, in one place. Collisions are design decisions and belong to the human.

When to Use