chore(release): 0.2.2

- Extend `listArchiveTags`, `getAvailableRemotes`, `deleteLocalTag`, `deleteRemoteTag`, and `cleanupMultiModel` to accept `mode` and `abortSignal` for better control and cancellation.
- Update internal calls to pass the new parameters throughout the cleanup workflow.
- Add detailed JSDoc comments for the new arguments.
- Modify `closeMultiModel` to destructure `mode` and `abortSignal` from options and forward them to `runCommand` calls, including spinner messages for session checks, killing sessions, and worktree removal.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "opencode-multi-model",
-  "version": "0.1.4",
+  "version": "0.2.2",
   "description": "Launch multiple AI models in tmux sessions - OpenCode Plugin, CLI, and Project Tool",
   "type": "module",
   "main": "./dist/index.js",

src/cli.ts

@@ -1,10 +1,11 @@
 #!/usr/bin/env bun
+import chalk from "chalk";
 import { Command } from "commander";
 import pkg from "../package.json";
 import { cleanupMultiModel } from "./core/cleanup";
 import { closeMultiModel } from "./core/close";
 import { openMultiModel } from "./core/open";
-import { getBinaryName } from "./core/utils";
+import { getBinaryName, loadSettings, promptUser } from "./core/utils";
 
 const program = new Command();
 
@@ -26,19 +27,45 @@ program
     "-b, --binary <binary>",
     "Binary to use (opencode or kilo). Defaults to env var OPENCODE_MULTI_MODEL_BINARY or 'opencode'",
   )
+  .option("-f, --force", "Skip confirmation prompts", false)
   .action(
     async (
       sessionName: string,
-      options: { models: string[]; binary?: string },
+      options: { models: string[]; binary?: string; force: boolean },
     ) => {
       try {
+        let models = options.models;
+
+        if (models.length === 0) {
+          const settings = await loadSettings();
+          if (settings.lastModels.length > 0) {
+            if (!options.force) {
+              const modelList = settings.lastModels
+                .map((m) => `  - ${chalk.cyan(m)}`)
+                .join("\n");
+              const answer = await promptUser(
+                `Continue with last used models?\n${modelList}\n(Y/n): `,
+              );
+              if (
+                answer.toLowerCase() === "y" ||
+                answer.toLowerCase() === "yes"
+              ) {
+                models = settings.lastModels;
+              }
+            } else {
+              models = settings.lastModels;
+            }
+          }
+        }
+
         const binaryName = options.binary || getBinaryName();
 
         const result = await openMultiModel({
           sessionName,
-          models: options.models,
+          models,
           binaryName,
           mode: "cli",
+          saveToSettings: true,
         });
 
         if (result.success) {

src/core/cleanup.ts

@@ -1,37 +1,36 @@
-import * as readline from "node:readline";
 import chalk from "chalk";
 import type { CleanupOptions, CleanupResult } from "../types";
-import { runCommand } from "./utils";
+import { promptUser, runCommand } from "./utils";
-
-/**
- * Prompts the user for confirmation on the terminal.
- */
-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);
-    });
-  });
-}
 
 /**
  * Lists all archive tags matching the pattern archive/*.
  */
-export async function listArchiveTags(): Promise<string[]> {
+export async function listArchiveTags(
-  const { stdout } = await runCommand(["git", "tag", "-l", "archive/*"]);
+  mode?: "cli" | "tool",
+  abortSignal?: AbortSignal,
+): Promise<string[]> {
+  const { stdout } = await runCommand(["git", "tag", "-l", "archive/*"], {
+    mode,
+    abortSignal,
+  });
   return stdout.split("\n").filter(Boolean);
 }
 
 /**
  * Gets the list of available git remotes.
  */
-export async function getAvailableRemotes(): Promise<string[]> {
+/**
-  const { stdout } = await runCommand(["git", "remote"]);
+ * Retrieves the list of git remotes.
+ * Accepts optional mode and abort signal for cancellation support.
+ */
+export async function getAvailableRemotes(
+  mode?: "cli" | "tool",
+  abortSignal?: AbortSignal,
+): Promise<string[]> {
+  const { stdout } = await runCommand(["git", "remote"], {
+    mode,
+    abortSignal,
+  });
   return stdout.split("\n").filter(Boolean);
 }
 
@@ -41,10 +40,12 @@ export async function getAvailableRemotes(): Promise<string[]> {
 async function deleteLocalTag(
   tagName: string,
   mode?: "cli" | "tool",
+  abortSignal?: AbortSignal,
 ): Promise<boolean> {
   const result = await runCommand(["git", "tag", "-d", tagName], {
     mode,
     spinnerMsg: `Deleting local tag ${tagName}...`,
+    abortSignal,
   });
   return result.ok;
 }
@@ -56,12 +57,14 @@ async function deleteRemoteTag(
   tagName: string,
   remoteName: string,
   mode?: "cli" | "tool",
+  abortSignal?: AbortSignal,
 ): Promise<{ ok: boolean; error: string }> {
   const result = await runCommand(
     ["git", "push", remoteName, "--delete", tagName],
     {
       mode,
       spinnerMsg: `Deleting remote tag ${tagName} from ${remoteName}...`,
+      abortSignal,
     },
   );
   return {
@@ -82,11 +85,11 @@ async function deleteRemoteTag(
 export async function cleanupMultiModel(
   options: CleanupOptions,
 ): Promise<CleanupResult> {
-  const { force = false, remote, mode } = options;
+  const { force = false, remote, mode, abortSignal } = options;
 
   // Get available remotes and archive tags first
-  const availableRemotes = await getAvailableRemotes();
+  const availableRemotes = await getAvailableRemotes(mode, abortSignal);
-  const archiveTags = await listArchiveTags();
+  const archiveTags = await listArchiveTags(mode, abortSignal);
 
   // Determine whether to push to remote and which remote to use:
   // - remote === false: --no-remote flag, local-only mode
@@ -172,7 +175,7 @@ export async function cleanupMultiModel(
 
   // Delete local tags
   for (const tag of archiveTags) {
-    const deleted = await deleteLocalTag(tag, mode);
+    const deleted = await deleteLocalTag(tag, mode, abortSignal);
     if (deleted) {
       localTagNames.push(tag);
     }
@@ -181,7 +184,12 @@ export async function cleanupMultiModel(
   // Delete from remote (if remote is specified and exists)
   if (shouldPushToRemote && remoteToDeleteFrom) {
     for (const tag of localTagNames) {
-      const result = await deleteRemoteTag(tag, remoteToDeleteFrom, mode);
+      const result = await deleteRemoteTag(
+        tag,
+        remoteToDeleteFrom,
+        mode,
+        abortSignal,
+      );
       if (result.ok) {
         remoteTagNames.push(tag);
       } else {

src/core/close.ts

@@ -1,33 +1,13 @@
-import * as readline from "node:readline";
 import chalk from "chalk"; // removed console usage
 import type { CloseSessionOptions, CloseSessionResult } from "../types";
 import {
   getSessionPath,
   getWorktreesForSession,
+  promptUser,
   runCommand,
   sanitizeName,
 } from "./utils";
 
-/**
- * Prompts the user for input on the terminal.
- *
- * @param question The question to display.
- * @returns The user's answer.
- */
-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);
-    });
-  });
-}
-
 /**
  * Closes a multi-model tmux session and optionally cleans up worktrees and branches.
  *
@@ -56,21 +36,27 @@ export async function closeMultiModel(
   const instructionsArr: string[] = [];
   const branchesDeleted: string[] = [];
   const tagsCreated: string[] = [];
-  const mode = options.mode;
+  const { mode, abortSignal } = options;
 
   const safeSessionName = sanitizeName(options.sessionName);
   try {
     // Check if session exists
-    const { ok: sessionExists } = await runCommand([
+    const { ok: sessionExists } = await runCommand(
-      "tmux",
+      ["tmux", "has-session", "-t", options.sessionName],
-      "has-session",
+      {
-      "-t",
+        mode,
-      options.sessionName,
+        spinnerMsg: `Checking if session '${options.sessionName}' exists...`,
-    ]);
+        abortSignal,
+      },
+    );
 
     // Kill tmux session if it exists
     if (sessionExists) {
-      await runCommand(["tmux", "kill-session", "-t", options.sessionName]);
+      await runCommand(["tmux", "kill-session", "-t", options.sessionName], {
+        mode,
+        spinnerMsg: `Killing session '${options.sessionName}'...`,
+        abortSignal,
+      });
       instructionsArr.push(
         chalk.green(`Closed session '${options.sessionName}'`),
       );
@@ -116,6 +102,7 @@ export async function closeMultiModel(
           await runCommand(["git", "worktree", "remove", "-f", worktree.path], {
             mode,
             spinnerMsg: `Removing worktree ${worktree.path}...`,
+            abortSignal,
           });
           worktreesRemoved.push(worktree.path);
 
@@ -141,6 +128,7 @@ export async function closeMultiModel(
           await runCommand(["git", "branch", "-D", worktree.branch], {
             mode,
             spinnerMsg: `Deleting branch ${worktree.branch}...`,
+            abortSignal,
           });
           branchesDeleted.push(worktree.branch);
         } catch (err) {
@@ -153,7 +141,11 @@ export async function closeMultiModel(
       // Also remove the base directory
       const worktreeBase = getSessionPath(safeSessionName);
       try {
-        await runCommand(["rm", "-rf", worktreeBase]);
+        await runCommand(["rm", "-rf", worktreeBase], {
+          mode,
+          spinnerMsg: `Removing worktree base directory: ${worktreeBase}...`,
+          abortSignal,
+        });
       } catch {
         // Ignore errors
       }

src/core/open.ts

@@ -1,6 +1,6 @@
 import * as fs from "node:fs";
 import chalk from "chalk";
-import type { MultiModelOptions, MultiModelResult } from "../types";
+import type { OpenSessionOptions, OpenSessionResult } from "../types";
 import {
   createWindowPlans,
   findDuplicates,
@@ -10,6 +10,7 @@ import {
   normalizeModels,
   runCommand,
   sanitizeName,
+  saveSettings,
   undoWorktree,
 } from "./utils";
 
@@ -35,13 +36,13 @@ import {
  * ```
  */
 export async function openMultiModel(
-  options: MultiModelOptions,
+  options: OpenSessionOptions,
-): Promise<MultiModelResult> {
+): Promise<OpenSessionResult> {
   const sessionName = options.sessionName.trim();
   const safeSessionName = sanitizeName(sessionName);
   const models = normalizeModels(options.models);
   const binaryName = options.binaryName || "opencode";
-  const mode = options.mode;
+  const { mode, abortSignal } = options;
 
   if (!sessionName) {
     return {
@@ -68,11 +69,14 @@ export async function openMultiModel(
     };
   }
 
-  const gitRepoCheck = await runCommand([
+  const gitRepoCheck = await runCommand(
-    "git",
+    ["git", "rev-parse", "--is-inside-work-tree"],
-    "rev-parse",
+    {
-    "--is-inside-work-tree",
+      mode,
-  ]);
+      spinnerMsg: "Checking if inside git repository...",
+      abortSignal,
+    },
+  );
   if (!gitRepoCheck.ok) {
     return {
       success: false,
@@ -81,7 +85,11 @@ export async function openMultiModel(
     };
   }
 
-  const tmuxExists = await runCommand(["command", "-v", "tmux"]);
+  const tmuxExists = await runCommand(["command", "-v", "tmux"], {
+    mode,
+    spinnerMsg: "Checking if tmux is installed...",
+    abortSignal,
+  });
   if (!tmuxExists.ok) {
     return {
       success: false,
@@ -90,7 +98,11 @@ export async function openMultiModel(
     };
   }
 
-  const binaryExists = await runCommand(["command", "-v", binaryName]);
+  const binaryExists = await runCommand(["command", "-v", binaryName], {
+    mode,
+    spinnerMsg: `Checking if ${binaryName} is installed...`,
+    abortSignal,
+  });
   if (!binaryExists.ok) {
     return {
       success: false,
@@ -102,6 +114,7 @@ export async function openMultiModel(
   const modelListResult = await runCommand([binaryName, "models"], {
     mode,
     spinnerMsg: `Fetching available models using \`${binaryName} models\`...`,
+    abortSignal,
   });
   if (!modelListResult.ok) {
     return {
@@ -125,12 +138,14 @@ export async function openMultiModel(
     };
   }
 
-  const sessionExists = await runCommand([
+  const sessionExists = await runCommand(
-    "tmux",
+    ["tmux", "has-session", "-t", sessionName],
-    "has-session",
+    {
-    "-t",
+      mode,
-    sessionName,
+      spinnerMsg: `Checking if tmux session '${sessionName}' already exists...`,
-  ]);
+      abortSignal,
+    },
+  );
   if (sessionExists.ok) {
     return {
       success: false,
@@ -165,13 +180,14 @@ export async function openMultiModel(
       }
     }
 
-    const branchExists = await runCommand([
+    const branchExists = await runCommand(
-      "git",
+      ["git", "show-ref", "--verify", "--quiet", `refs/heads/${branchName}`],
-      "show-ref",
+      {
-      "--verify",
+        mode,
-      "--quiet",
+        spinnerMsg: `Checking if branch '${branchName}' already exists...`,
-      `refs/heads/${branchName}`,
+        abortSignal,
-    ]);
+      },
+    );
     if (branchExists.ok) {
       if (!isFirst) {
         failedModels.push(
@@ -189,7 +205,11 @@ export async function openMultiModel(
 
     const worktreeResult = await runCommand(
       ["git", "worktree", "add", "-b", branchName, worktreePath],
-      { mode, spinnerMsg: `Creating worktree for ${plan.model}...` },
+      {
+        mode,
+        spinnerMsg: `Creating worktree for ${plan.model}...`,
+        abortSignal,
+      },
     );
     if (!worktreeResult.ok) {
       if (!isFirst) {
@@ -219,7 +239,11 @@ export async function openMultiModel(
           "-c",
           worktreePath,
         ],
-        { mode, spinnerMsg: `Starting tmux session '${sessionName}'...` },
+        {
+          mode,
+          spinnerMsg: `Starting tmux session '${sessionName}'...`,
+          abortSignal,
+        },
       );
 
       if (!sessionCreateResult.ok) {
@@ -243,7 +267,11 @@ export async function openMultiModel(
           "-c",
           worktreePath,
         ],
-        { mode, spinnerMsg: `Creating tmux window '${plan.windowName}'...` },
+        {
+          mode,
+          spinnerMsg: `Creating tmux window '${plan.windowName}'...`,
+          abortSignal,
+        },
       );
 
       if (!windowCreateResult.ok) {
@@ -313,6 +341,10 @@ export async function openMultiModel(
     };
   }
 
+  if (options.saveToSettings) {
+    await saveSettings({ lastModels: models });
+  }
+
   return {
     success: true,
     sessionName,

src/core/utils.ts

@@ -1,13 +1,18 @@
+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,
 } from "../types";
 
+let sharedSpinner: Ora | undefined;
+
 const MAX_SUGGESTIONS = 3;
 const WINDOW_NAME_LIMIT = 24;
 
@@ -35,17 +40,22 @@ export async function runCommand(
     process.env.NODE_ENV === "test" || process.env.BUN_ENV === "test";
   if (options?.mode === "cli" && !isTest) {
     const msg = options.spinnerMsg || `Running ${parts[0]}...`;
-    spinner = ora(msg).start();
+    if (!sharedSpinner) {
+      sharedSpinner = ora(msg).start();
+    } else {
+      sharedSpinner.text = msg;
+      if (!sharedSpinner.isSpinning) {
+        sharedSpinner.start();
+      }
+    }
+    spinner = sharedSpinner;
   }
 
+  options?.abortSignal?.throwIfAborted();
   const result = await Bun.$`${parts}`.quiet().nothrow();
 
   if (spinner) {
-    if (result.exitCode === 0) {
+    spinner.stop().clear();
-      spinner.succeed();
-    } else {
-      spinner.fail();
-    }
   }
 
   return {
@@ -483,3 +493,49 @@ 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);
+    });
+  });
+}

src/index.ts

@@ -30,6 +30,3 @@ const OpenCodeMultiModelPlugin: Plugin = async (_ctx) => {
 };
 
 export default OpenCodeMultiModelPlugin;
-export * from "./core/index";
-export * from "./types";
-export { cleanupTool, closeTool, openTool };

src/tools/open.ts

@@ -32,14 +32,7 @@ Arguments:
       models: args.models,
       binaryName,
       mode: "tool",
-    });
+      abortSignal: context.abort,
-
-    context.metadata({
-      title: `multi-model ${args.sessionName}`,
-      metadata: {
-        safeSessionName: result.sessionName,
-        modelCount: args.models.length,
-      },
     });
 
     if (!result.success) {

src/types.ts

@@ -1,7 +1,14 @@
+/**
+ * Settings stored in ~/.config/opencode-multi-model/settings.json
+ */
+export interface MultiModelSettings {
+  lastModels: string[];
+}
+
 /**
  * Options for launching a multi-model tmux session.
  */
-export interface MultiModelOptions {
+export interface OpenSessionOptions {
   /** Name for the tmux session. */
   sessionName: string;
   /** List of model ids to launch. */
@@ -10,12 +17,16 @@ export interface MultiModelOptions {
   binaryName?: string;
   /** Caller context: 'cli' shows shell commands, 'tool' shows tool instructions. */
   mode: "cli" | "tool";
+  /** Save models to settings file on successful launch (CLI only). */
+  saveToSettings?: boolean;
+  /** Signal to abort the operation. */
+  abortSignal?: AbortSignal;
 }
 
 /**
  * Result returned after attempting to launch a multi-model session.
  */
-export interface MultiModelResult {
+export interface OpenSessionResult {
   /** Whether the launch succeeded. */
   success: boolean;
   /** The session name used. */
@@ -42,6 +53,8 @@ export interface CloseSessionOptions {
   force?: boolean;
   /** Caller context: 'cli' shows shell commands, 'tool' shows tool instructions. */
   mode: "cli" | "tool";
+  /** Signal to abort the operation. */
+  abortSignal?: AbortSignal;
 }
 
 /**
@@ -91,6 +104,8 @@ export interface CleanupOptions {
   remote?: string | false;
   /** Caller context: 'cli' shows shell commands, 'tool' shows tool instructions. */
   mode: "cli" | "tool";
+  /** Optional abort signal to cancel the operation. */
+  abortSignal?: AbortSignal;
 }
 
 /**
@@ -137,6 +152,8 @@ export interface RunCommandOptions {
   mode?: "cli" | "tool";
   /** Message to display in the spinner while the command runs. */
   spinnerMsg?: string;
+  /** Signal to abort the operation. Check it before running the command. */
+  abortSignal?: AbortSignal;
 }
 
 /**

tests/open.test.ts

@@ -538,6 +538,34 @@ describe("multi-model launch", () => {
       ?.match(/-n (\S+)/)?.[1];
     expect(windowName?.length).toBeLessThanOrEqual(24);
   });
+
+  test("saves settings on successful launch when saveToSettings is true", async () => {
+    spyOn(fs.promises, "mkdir").mockResolvedValue(undefined);
+    spyOn(fs.promises, "writeFile").mockResolvedValue(undefined);
+
+    const result = await openMultiModel({
+      mode: "cli",
+      sessionName: "test-session",
+      models: ["openai/gpt-5.2"],
+      saveToSettings: true,
+    });
+
+    expect(result.success).toBe(true);
+  });
+
+  test("does not save settings when saveToSettings is false", async () => {
+    spyOn(fs.promises, "mkdir").mockResolvedValue(undefined);
+    spyOn(fs.promises, "writeFile").mockResolvedValue(undefined);
+
+    const result = await openMultiModel({
+      mode: "cli",
+      sessionName: "test-session",
+      models: ["openai/gpt-5.2"],
+      saveToSettings: false,
+    });
+
+    expect(result.success).toBe(true);
+  });
 });
 
 // ----------

tests/utils.test.ts

@@ -7,6 +7,7 @@ import {
   spyOn,
   test,
 } from "bun:test";
+import * as fs from "node:fs";
 import * as os from "node:os";
 import {
   createWindowBaseName,
@@ -15,13 +16,16 @@ import {
   formatInvalidModelError,
   getBinaryName,
   getSessionPath,
+  getSettingsPath,
   getWorktreePath,
   getWorktreesForSession,
   launchModelInWindow,
   levenshtein,
+  loadSettings,
   normalizeModels,
   runCommand,
   sanitizeName,
+  saveSettings,
   shellQuote,
   suggestModels,
   undoWorktree,
@@ -484,4 +488,86 @@ describe("core utils", () => {
       delete process.env.OPENCODE_MULTI_MODEL_BINARY;
     });
   });
+
+  describe("getSettingsPath", () => {
+    test("returns correct settings path", () => {
+      spyOn(os, "homedir").mockReturnValue("/home/user");
+      expect(getSettingsPath()).toBe(
+        "/home/user/.config/opencode-multi-model/settings.json",
+      );
+    });
+  });
+
+  describe("loadSettings", () => {
+    let readFileMock: ReturnType<typeof spyOn>;
+
+    beforeEach(() => {
+      spyOn(os, "homedir").mockReturnValue("/home/user");
+      readFileMock = spyOn(fs.promises, "readFile");
+    });
+
+    test("returns default settings when file does not exist", async () => {
+      readFileMock.mockRejectedValue(new Error("ENOENT"));
+      const result = await loadSettings();
+      expect(result).toEqual({ lastModels: [] });
+    });
+
+    test("returns default settings when file has invalid JSON", async () => {
+      readFileMock.mockResolvedValue("not valid json");
+      const result = await loadSettings();
+      expect(result).toEqual({ lastModels: [] });
+    });
+
+    test("returns default settings when lastModels is not an array", async () => {
+      readFileMock.mockResolvedValue(
+        JSON.stringify({ lastModels: "not array" }),
+      );
+      const result = await loadSettings();
+      expect(result).toEqual({ lastModels: [] });
+    });
+
+    test("parses valid settings file", async () => {
+      readFileMock.mockResolvedValue(
+        JSON.stringify({ lastModels: ["model1", "model2"] }),
+      );
+      const result = await loadSettings();
+      expect(result).toEqual({ lastModels: ["model1", "model2"] });
+    });
+  });
+
+  describe("saveSettings", () => {
+    let mkdirMock: ReturnType<typeof spyOn>;
+    let writeFileMock: ReturnType<typeof spyOn>;
+
+    beforeEach(() => {
+      spyOn(os, "homedir").mockReturnValue("/home/user");
+      mkdirMock = spyOn(fs.promises, "mkdir");
+      writeFileMock = spyOn(fs.promises, "writeFile");
+    });
+
+    test("creates directory if it does not exist", async () => {
+      mkdirMock.mockResolvedValue(undefined);
+      writeFileMock.mockResolvedValue(undefined);
+
+      await saveSettings({ lastModels: ["model1"] });
+
+      expect(mkdirMock).toHaveBeenCalledWith(
+        "/home/user/.config/opencode-multi-model",
+        { recursive: true },
+      );
+    });
+
+    test("writes settings with correct content", async () => {
+      mkdirMock.mockResolvedValue(undefined);
+      writeFileMock.mockResolvedValue(undefined);
+
+      await saveSettings({ lastModels: ["model1", "model2"] });
+
+      expect(writeFileMock).toHaveBeenCalledWith(
+        "/home/user/.config/opencode-multi-model/settings.json",
+        JSON.stringify({ lastModels: ["model1", "model2"] }, null, 2),
+        "utf-8",
+      );
+    });
+  });
 });