Slate v2 Op-family Thirteenth Slice

Supporting plan. For current queue and roadmap truth, see master-roadmap.md.

Goal

• Land the next broader unresolved node family in slate: a narrow exact-path wrapNodes(...) / unwrapNodes(...) cut.

Scope

• Start with exact path-based block wrapping and unwrapping only.
• Avoid match/mode/split/void parity in this slice.

Phases

• Confirm the exact narrow wrap/unwrap semantics and current structural seams
• Write focused failing tests
• Implement the smallest honest core/API slice
• Sync package/public docs
• Verify the touched package/docs