feat: add models.dev schema ref for model autocomplete in opencode.json (#12528)

packages/opencode/src/config/config.ts

@@ -33,6 +33,8 @@ import { proxied } from "@/util/proxied"
 import { iife } from "@/util/iife"
 
 export namespace Config {
+  const ModelId = z.string().meta({ $ref: "https://models.dev/model-schema.json#/$defs/Model" })
+
   const log = Log.create({ service: "config" })
 
   // Managed settings directory for enterprise deployments (highest priority, admin-controlled)
@@ -653,7 +655,7 @@ export namespace Config {
     template: z.string(),
     description: z.string().optional(),
     agent: z.string().optional(),
-    model: z.string().optional(),
+    model: ModelId.optional(),
     subtask: z.boolean().optional(),
   })
   export type Command = z.infer<typeof Command>
@@ -669,7 +671,7 @@ export namespace Config {
 
   export const Agent = z
     .object({
-      model: z.string().optional(),
+      model: ModelId.optional(),
       variant: z
         .string()
         .optional()
@@ -1040,11 +1042,8 @@ export namespace Config {
         .array(z.string())
         .optional()
         .describe("When set, ONLY these providers will be enabled. All other providers will be ignored"),
-      model: z.string().describe("Model to use in the format of provider/model, eg anthropic/claude-2").optional(),
-      small_model: z
-        .string()
-        .describe("Small model to use for tasks like title generation in the format of provider/model")
-        .optional(),
+      model: ModelId.describe("Model to use in the format of provider/model, eg anthropic/claude-2").optional(),
+      small_model: ModelId.describe("Small model to use for tasks like title generation in the format of provider/model").optional(),
       default_agent: z
         .string()
         .optional()