@renderyes/planner

@renderyes/planner composes provider-neutral Plan 3.1 plans from:

• a registered RenderYes site and surface;
• the external capability catalog's planner-safe manifest; and
• the shared PlanProvider interface from @renderyes/core.

The package does not execute capabilities or render UI. It builds a closed JSON Schema, treats provider output as untrusted, applies deterministic validation, and returns either a validated plan, a structured unsupported result, or a controlled failure with an optional previous-plan fallback.

The planner composes one surface whose compatible data slots may bind to a single approved request or a provider-selected set composition. A composition may use only union, intersection, or difference over two or more declared requests whose catalog capabilities advertise that operation and share one output data type. The trusted executor still owns matching, provenance, freshness, and row projection.

Relationship-join and nested-layout planning are both implemented, backed by their deterministic execution contracts.