fix(opencode): keep model switching runtime-hot

electron/opencode/client.ts

@@ -278,7 +278,12 @@ export function createOpencodeClient(options: OpencodeClientOptions) {
     ): Promise<void> =>
       request<void>(`/api/session/${encodeURIComponent(sessionID)}/model`, {
         method: 'POST',
-        body: JSON.stringify({ model }),
+        body: JSON.stringify({
+          model: {
+            providerID: model.providerID,
+            id: model.modelID,
+          },
+        }),
         signal: options?.signal,
       }),
     executeSessionCommand: (

electron/opencode/provider-config.ts

@@ -23,6 +23,7 @@ const OPENAI_COMPATIBLE_PACKAGE = '@ai-sdk/openai-compatible';
 const OPENAI_PACKAGE = '@ai-sdk/openai';
 const ANTHROPIC_PACKAGE = '@ai-sdk/anthropic';
 const WORKS_SQUARE_AI_GATEWAY_CREDENTIAL_MODE = 'works_square_ai_gateway';
+const WORKS_SQUARE_AI_GATEWAY_PROXY_CREDENTIAL_MODE = 'works_square_ai_gateway_proxy';
 
 const OPENCODE_BUILTIN_PROVIDER_IDS = new Set([
   'anthropic',
@@ -120,6 +121,7 @@ export interface BuildOpencodeRuntimeConfigOptions {
   accounts: ProviderAccount[];
   defaultAccountId?: string | null;
   resolveApiKey: ResolveOpencodeProviderApiKey;
+  localProxyApiKey?: string;
   mcpServers?: Record<string, OpencodeMcpServerEntry>;
 }
 
@@ -303,7 +305,11 @@ export async function buildOpencodeRuntimeConfig(
       continue;
     }
 
-    const apiKey = await options.resolveApiKey(account, opencodeProviderId);
+    const localProxyApiKey = account.id === NIANCODE_USER_MODEL_ACCOUNT_ID
+      && account.metadata?.worksSquareCredentialMode === WORKS_SQUARE_AI_GATEWAY_PROXY_CREDENTIAL_MODE
+      ? options.localProxyApiKey
+      : undefined;
+    const apiKey = localProxyApiKey ?? await options.resolveApiKey(account, opencodeProviderId);
     if (!apiKey && accountNeedsApiKey(account)) {
       continue;
     }
@@ -367,6 +373,7 @@ async function resolveNianCodeApiKey(
 }
 
 export interface BuildOpencodeRuntimeConfigFromNianCodeProvidersOptions {
+  localProxyApiKey?: string;
   mcpServers?: Record<string, OpencodeMcpServerEntry>;
 }
 
@@ -383,6 +390,7 @@ export async function buildOpencodeRuntimeConfigFromNianCodeProviders(
     accounts,
     defaultAccountId,
     resolveApiKey: resolveNianCodeApiKey,
+    localProxyApiKey: options.localProxyApiKey,
     mcpServers: options.mcpServers,
   });
 }