feat(coding-agent): merge origin/main into model runtime facade

packages/ai/src/models-store.ts

@@ -0,0 +1,35 @@
+import type { Api, Model } from "./types.ts";
+
+/** Persistent model catalogs keyed by provider ID. */
+export interface ModelsStore {
+	read(providerId: string): Promise<readonly Model<Api>[] | undefined>;
+	write(providerId: string, models: readonly Model<Api>[]): Promise<void>;
+	delete(providerId: string): Promise<void>;
+}
+
+/** ModelsStore scoped to one provider. Providers cannot access other providers' catalogs. */
+export interface ProviderModelsStore {
+	read(): Promise<readonly Model<Api>[] | undefined>;
+	write(models: readonly Model<Api>[]): Promise<void>;
+	delete(): Promise<void>;
+}
+
+export class InMemoryModelsStore implements ModelsStore {
+	private readonly models = new Map<string, readonly Model<Api>[]>();
+
+	async read(providerId: string): Promise<readonly Model<Api>[] | undefined> {
+		const models = this.models.get(providerId);
+		return models?.map((model) => structuredClone(model));
+	}
+
+	async write(providerId: string, models: readonly Model<Api>[]): Promise<void> {
+		this.models.set(
+			providerId,
+			models.map((model) => structuredClone(model)),
+		);
+	}
+
+	async delete(providerId: string): Promise<void> {
+		this.models.delete(providerId);
+	}
+}