build: remember last models

src/core/utils.ts

@@ -1,8 +1,11 @@
+import * as fs from "node:fs";
 import * as os from "node:os";
 import * as path from "node:path";
+import * as readline from "node:readline";
 import ora, { type Ora } from "ora";
 import type {
   CommandResult,
+  MultiModelSettings,
   RunCommandOptions,
   WindowLaunchPlan,
   WorktreeInfo,
@@ -489,3 +492,49 @@ export async function undoWorktree(
 export function getBinaryName(): string {
   return process.env.OPENCODE_MULTI_MODEL_BINARY || "opencode";
 }
+
+export function getSettingsPath(): string {
+  const homedir = os.homedir();
+  return path.join(homedir, ".config", "opencode-multi-model", "settings.json");
+}
+
+export async function loadSettings(): Promise<MultiModelSettings> {
+  const settingsPath = getSettingsPath();
+  try {
+    const content = await fs.promises.readFile(settingsPath, "utf-8");
+    const parsed = JSON.parse(content) as MultiModelSettings;
+    if (!Array.isArray(parsed.lastModels)) {
+      return { lastModels: [] };
+    }
+    return parsed;
+  } catch {
+    return { lastModels: [] };
+  }
+}
+
+export async function saveSettings(
+  settings: MultiModelSettings,
+): Promise<void> {
+  const settingsPath = getSettingsPath();
+  const dir = path.dirname(settingsPath);
+  await fs.promises.mkdir(dir, { recursive: true });
+  await fs.promises.writeFile(
+    settingsPath,
+    JSON.stringify(settings, null, 2),
+    "utf-8",
+  );
+}
+
+export async function promptUser(question: string): Promise<string> {
+  const rl = readline.createInterface({
+    input: process.stdin,
+    output: process.stdout,
+  });
+
+  return new Promise((resolve) => {
+    rl.question(question, (answer) => {
+      rl.close();
+      resolve(answer);
+    });
+  });
+}