feat: Add config flag to filter provider models

packages/opencode/src/config/config.ts

@@ -157,6 +157,10 @@ export namespace Config {
         .array(z.string())
         .optional()
         .describe("Disable providers that are loaded automatically"),
+      onlyConfigModels: z
+        .boolean()
+        .optional()
+        .describe("Only show models that are explicitly defined in the config (global setting)"),
       model: z
         .string()
         .describe(
@@ -168,6 +172,10 @@ export namespace Config {
           ModelsDev.Provider.partial().extend({
             models: z.record(ModelsDev.Model.partial()),
             options: z.record(z.any()).optional(),
+            onlyConfigModels: z
+              .boolean()
+              .optional()
+              .describe("Only show models that are explicitly defined in the config for this provider"),
           }),
         )
         .optional()

packages/opencode/src/provider/provider.ts

@@ -241,13 +241,18 @@ export namespace Provider {
 
     for (const [providerID, provider] of configProviders) {
       const existing = database[providerID]
+      
+      // Check if onlyConfigModels is enabled (per-provider setting takes precedence over global)
+      const onlyConfigModels = provider.onlyConfigModels ?? config.onlyConfigModels ?? false
+      
       const parsed: ModelsDev.Provider = {
         id: providerID,
         npm: provider.npm ?? existing?.npm,
         name: provider.name ?? existing?.name ?? providerID,
         env: provider.env ?? existing?.env ?? [],
         api: provider.api ?? existing?.api,
-        models: existing?.models ?? {},
+        // If onlyConfigModels is true, start with empty models, otherwise use database models
+        models: onlyConfigModels ? {} : (existing?.models ?? {}),
       }
 
       for (const [modelID, model] of Object.entries(provider.models ?? {})) {