feat(chat): expose model options config

tests/chat/models.test.ts

@@ -0,0 +1,70 @@
+import { describe, expect, it } from "bun:test";
+
+import {
+  agentModelOptions,
+  isSupportedModel,
+  resolveDefaultModel,
+  supportedModels,
+} from "../../src/chat/models.js";
+import { parseAgentModelOptions } from "../../src/chat/modelConfig.js";
+
+describe("agent model config", () => {
+  it("keeps every exposed option in the supported model list", () => {
+    expect(agentModelOptions.map((model) => model.id)).toEqual(supportedModels);
+    expect(
+      agentModelOptions.every(
+        (model) => model.label && model.description && model.icon,
+      ),
+    ).toBe(true);
+  });
+
+  it("validates supported model ids", () => {
+    expect(isSupportedModel("deepseek/deepseek-v4-flash")).toBe(true);
+    expect(isSupportedModel("unknown/model")).toBe(false);
+  });
+
+  it("rejects unsupported default models", () => {
+    expect(resolveDefaultModel("deepseek/deepseek-v4-pro")).toBe(
+      "deepseek/deepseek-v4-pro",
+    );
+    expect(() => resolveDefaultModel("unknown/model")).toThrow(
+      "unsupported default agent model",
+    );
+  });
+
+  it("parses full model option config from JSON", () => {
+    expect(
+      parseAgentModelOptions(
+        JSON.stringify([
+          {
+            id: "provider/model",
+            label: "自定义",
+            description: "自定义模型",
+            icon: "bolt",
+          },
+        ]),
+      ),
+    ).toEqual([
+      {
+        id: "provider/model",
+        label: "自定义",
+        description: "自定义模型",
+        icon: "bolt",
+      },
+    ]);
+  });
+
+  it("rejects invalid model option config", () => {
+    expect(() => parseAgentModelOptions("not-json")).toThrow(
+      "OPENCODE_MODEL_OPTIONS must be valid JSON",
+    );
+    expect(() =>
+      parseAgentModelOptions(
+        JSON.stringify([
+          { id: "provider/model", label: "模型" },
+          { id: "provider/model", label: "重复模型" },
+        ]),
+      ),
+    ).toThrow("duplicate OPENCODE_MODEL_OPTIONS id");
+  });
+});