Initial TrueGrowth source import

openspec/specs/runtime-model-discovery/spec.md

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+# runtime-model-discovery Specification
+
+## Purpose
+TBD - created by archiving change update-model-recommendation-sorting. Update Purpose after archive.
+## Requirements
+### Requirement: Built-in Model Recommendation Metadata
+The system SHALL allow built-in model definitions to carry a static recommendation score used for display prioritization.
+
+#### Scenario: Built-in model has curated recommendation score
+- **GIVEN** a built-in model definition is maintained in the static model catalog
+- **WHEN** the model config is exposed to selectors or settings views
+- **THEN** the model MAY include a recommendation score as part of its metadata
+- **AND** the score SHALL be treated as curated display metadata rather than runtime benchmark history
+
+### Requirement: Unified Model Display Ordering
+The system SHALL apply one shared ordering strategy across model selectors, settings model lists, and runtime selectable model collections.
+
+#### Scenario: Order models within the same family
+- **GIVEN** multiple models belong to the same normalized model family
+- **WHEN** the system sorts them for display
+- **THEN** it SHALL prioritize newer versions first
+- **AND** for equal version priority it SHALL sort by recommendation score in descending order
+
+#### Scenario: Reuse the same ordering in runtime-discovered selector flows
+- **GIVEN** a model selector consumes runtime selectable models that combine static and discovered entries
+- **WHEN** the selector renders the model list
+- **THEN** it SHALL use the same shared ordering strategy as other model display surfaces
+- **AND** the ordering SHALL not depend on a selector-specific local sort implementation
+