chore(vendor): import pi 0.85.1

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: d981de1229ef899957bbe968bc8dcda02a21f477

third_party/pi/packages/ai/src/model-catalog.ts

@@ -0,0 +1,27 @@
+import type { Api, Model, ProviderId } from "./types.ts";
+
+export type ModelGroups = Record<string, Record<string, object>>;
+
+type ModelId<TGroups extends ModelGroups> = {
+	[TApi in keyof TGroups]: keyof TGroups[TApi];
+}[keyof TGroups] &
+	string;
+
+type ModelApi<TGroups extends ModelGroups, TModelId extends ModelId<TGroups>> = {
+	[TApi in keyof TGroups]: TModelId extends keyof TGroups[TApi] ? TApi : never;
+}[keyof TGroups] &
+	Api;
+
+export type ModelCatalog<TGroups extends ModelGroups, TProvider extends ProviderId> = {
+	[TModelId in ModelId<TGroups>]: Model<ModelApi<TGroups, TModelId>> & {
+		id: TModelId;
+		provider: TProvider;
+	};
+};
+
+export function flattenModelCatalog<const TProvider extends ProviderId, const TGroups extends ModelGroups>(
+	_provider: TProvider,
+	groups: TGroups,
+): ModelCatalog<TGroups, TProvider> {
+	return Object.assign({}, ...Object.values(groups)) as ModelCatalog<TGroups, TProvider>;
+}