test: move extension-owned coverage into plugins

extensions/opencode/onboard.test.ts

@@ -0,0 +1,40 @@
+import { describe, expect, it } from "vitest";
+import {
+  resolveAgentModelFallbackValues,
+  resolveAgentModelPrimaryValue,
+} from "../../src/config/model-input.js";
+import {
+  createConfigWithFallbacks,
+  EXPECTED_FALLBACKS,
+} from "../../test/helpers/extensions/onboard-config.js";
+import { applyOpencodeZenConfig, applyOpencodeZenProviderConfig } from "./onboard.js";
+
+const MODEL_REF = "opencode/claude-opus-4-6";
+
+describe("opencode onboard", () => {
+  it("adds allowlist entry and preserves alias", () => {
+    const withDefault = applyOpencodeZenProviderConfig({});
+    expect(Object.keys(withDefault.agents?.defaults?.models ?? {})).toContain(MODEL_REF);
+
+    const withAlias = applyOpencodeZenProviderConfig({
+      agents: {
+        defaults: {
+          models: {
+            [MODEL_REF]: { alias: "My Opus" },
+          },
+        },
+      },
+    });
+    expect(withAlias.agents?.defaults?.models?.[MODEL_REF]?.alias).toBe("My Opus");
+  });
+
+  it("sets primary model and preserves existing model fallbacks", () => {
+    const cfg = applyOpencodeZenConfig({});
+    expect(resolveAgentModelPrimaryValue(cfg.agents?.defaults?.model)).toBe(MODEL_REF);
+
+    const cfgWithFallbacks = applyOpencodeZenConfig(createConfigWithFallbacks());
+    expect(resolveAgentModelFallbackValues(cfgWithFallbacks.agents?.defaults?.model)).toEqual([
+      ...EXPECTED_FALLBACKS,
+    ]);
+  });
+});