Add OpenCode provider integration and strict model selection

packages/adapters/opencode-local/src/server/models.test.ts

@@ -0,0 +1,33 @@
+import { afterEach, describe, expect, it } from "vitest";
+import {
+  ensureOpenCodeModelConfiguredAndAvailable,
+  listOpenCodeModels,
+  resetOpenCodeModelsCacheForTests,
+} from "./models.js";
+
+describe("openCode models", () => {
+  afterEach(() => {
+    delete process.env.PAPERCLIP_OPENCODE_COMMAND;
+    resetOpenCodeModelsCacheForTests();
+  });
+
+  it("returns an empty list when discovery command is unavailable", async () => {
+    process.env.PAPERCLIP_OPENCODE_COMMAND = "__paperclip_missing_opencode_command__";
+    await expect(listOpenCodeModels()).resolves.toEqual([]);
+  });
+
+  it("rejects when model is missing", async () => {
+    await expect(
+      ensureOpenCodeModelConfiguredAndAvailable({ model: "" }),
+    ).rejects.toThrow("OpenCode requires `adapterConfig.model`");
+  });
+
+  it("rejects when discovery cannot run for configured model", async () => {
+    process.env.PAPERCLIP_OPENCODE_COMMAND = "__paperclip_missing_opencode_command__";
+    await expect(
+      ensureOpenCodeModelConfiguredAndAvailable({
+        model: "openai/gpt-5",
+      }),
+    ).rejects.toThrow("Failed to start command");
+  });
+});