fix(pi): recover from Works prompt rejection

electron/coding-runtime/pi/provider-config.ts

@@ -43,6 +43,7 @@ export interface PiProviderModelDescriptor {
   compat?: {
     thinkingFormat?: 'deepseek' | 'openrouter';
     sessionAffinityFormat?: 'openrouter';
+    supportsDeveloperRole?: boolean;
     requiresReasoningContentOnAssistantMessages?: boolean;
   };
   thinkingLevelMap?: Partial<Record<ProductModelRef['thinkingLevel'], string | null>>;
@@ -291,6 +292,7 @@ function modelDescriptor(
   summaries: readonly ModelSummary[],
   compat: PiProviderModelDescriptor['compat'],
   backendModels: Map<string, ProviderModelEntry>,
+  enforcedCompat: PiProviderModelDescriptor['compat'],
 ): PiProviderModelDescriptor {
   const summary = summaries.find((candidate) => (
     candidate.id === modelId
@@ -320,8 +322,8 @@ function modelDescriptor(
       || backend?.reasoning === true,
     ...(contextWindow ? { contextWindow } : {}),
     ...(maxOutputTokens ? { maxOutputTokens } : {}),
-    ...(compat || profile?.pi?.compat
-      ? { compat: { ...compat, ...profile?.pi?.compat } }
+    ...(compat || profile?.pi?.compat || enforcedCompat
+      ? { compat: { ...compat, ...profile?.pi?.compat, ...enforcedCompat } }
       : {}),
     ...(profile?.pi?.thinkingLevelMap
       ? { thinkingLevelMap: { ...profile.pi.thinkingLevelMap } }
@@ -367,12 +369,19 @@ function descriptorForAccount(
     );
   }
   const apiKeyEnv = apiKeyEnvForAccount(account.id);
+  const credentialMode = account.metadata?.worksSquareCredentialMode;
+  const enforcedCompat: PiProviderModelDescriptor['compat'] = mapping.api === 'openai-completions'
+    && (credentialMode === WORKS_SQUARE_AI_GATEWAY_CREDENTIAL_MODE
+      || credentialMode === WORKS_SQUARE_AI_GATEWAY_PROXY_CREDENTIAL_MODE)
+    ? { supportsDeveloperRole: false }
+    : undefined;
   const models = modelIdsForAccount(account).map((modelId) => modelDescriptor(
     account,
     modelId,
     summaries,
     mapping.compat,
     backendModelEntries(account),
+    enforcedCompat,
   ));
   if (models.length === 0) {
     throw new PiProviderConfigError(