fix(coding-agent): refresh active model after provider updates closes #2291

packages/coding-agent/src/core/agent-session.ts

@@ -2057,6 +2057,20 @@ export class AgentSession {
 			: undefined;
 	}
 
+	private _refreshCurrentModelFromRegistry(): void {
+		const currentModel = this.model;
+		if (!currentModel) {
+			return;
+		}
+
+		const refreshedModel = this._modelRegistry.find(currentModel.provider, currentModel.id);
+		if (!refreshedModel || refreshedModel === currentModel) {
+			return;
+		}
+
+		this.agent.setModel(refreshedModel);
+	}
+
 	private _bindExtensionCore(runner: ExtensionRunner): void {
 		const normalizeLocation = (source: string): SlashCommandLocation | undefined => {
 			if (source === "user" || source === "project" || source === "path") {
@@ -2165,6 +2179,16 @@ export class AgentSession {
 				},
 				getSystemPrompt: () => this.systemPrompt,
 			},
+			{
+				registerProvider: (name, config) => {
+					this._modelRegistry.registerProvider(name, config);
+					this._refreshCurrentModelFromRegistry();
+				},
+				unregisterProvider: (name) => {
+					this._modelRegistry.unregisterProvider(name);
+					this._refreshCurrentModelFromRegistry();
+				},
+			},
 		);
 	}