OpenAI Codex v0.98.0 (research preview)
--------
workdir: /tmp/agent-comparison/codex
model: gpt-5.3-codex
provider: openai
approval: never
sandbox: workspace-write [workdir, /tmp, $TMPDIR]
reasoning effort: high
reasoning summaries: auto
session id: 019c652d-d911-76c3-92b4-42751d127461
--------
user
Build a Node.js CLI todo app with add, list, complete, and delete commands. Data should persist to a JSON file. Initialize git, write tests, and commit your work.
mcp: figma starting
mcp: figma failed: The figma MCP server is not logged in. Run `codex mcp login figma`.
2026-02-16T06:40:30.576378Z ERROR rmcp::transport::worker: worker quit with fatal: Transport channel closed, when AuthRequired(AuthRequiredError { www_authenticate_header: "Bearer resource_metadata=\"https://mcp.figma.com/.well-known/oauth-protected-resource\",scope=\"mcp:connect\",authorization_uri=\"https://api.figma.com/.well-known/oauth-authorization-server\"" })
mcp startup: failed: figma

thinking
**Planning Node CLI todo app**
codex
I’ll scaffold a small Node.js CLI project, implement `add/list/complete/delete` with JSON persistence, then add tests and run them before initializing git and creating a commit. I’m starting by inspecting the current workspace state so I can build on it safely.

thinking
**Inspecting repository status and files**
exec
/bin/zsh -lc 'pwd && ls -la' in /tmp/agent-comparison/codexexec
/bin/zsh -lc 'git rev-parse --is-inside-work-tree >/dev/null 2>&1; echo $?' in /tmp/agent-comparison/codex succeeded in 52ms:
/private/tmp/agent-comparison/codex
total 0
drwxr-xr-x@  3 santoshkumarradha  wheel   96 Feb 16 12:10 .
drwxr-xr-x@ 10 santoshkumarradha  wheel  320 Feb 16 12:09 ..
drwxr-xr-x@  9 santoshkumarradha  wheel  288 Feb 16 12:10 .git
 succeeded in 51ms:
0

thinking
**Checking existing Git status**
codex
The workspace is already a git repo, so I’ll add the project files directly here, then run tests and commit the changes. I’m checking repo status next.
exec
/bin/zsh -lc 'git status --short --branch' in /tmp/agent-comparison/codex succeeded in 52ms:
## No commits yet on main

thinking
**Initializing project structure**
codex
I’m creating the initial Node project structure now (`package.json`, source files, and test files), then I’ll fill in CLI logic and persistence.

thinking
**Planning multi-file CLI app setup**
exec
/bin/zsh -lc "mkdir -p bin src test
cat > package.json <<'EOF'
{
  \"name\": \"todo-cli\",
  \"version\": \"1.0.0\",
  \"description\": \"A Node.js CLI todo app\",
  \"type\": \"commonjs\",
  \"bin\": {
    \"todo\": \"bin/todo.js\"
  },
  \"scripts\": {
    \"test\": \"node --test\"
  },
  \"keywords\": [
    \"todo\",
    \"cli\"
  ],
  \"author\": \"\",
  \"license\": \"MIT\"
}
EOF
cat > .gitignore <<'EOF'
node_modules/
todos.json
.DS_Store
EOF
cat > src/todoStore.js <<'EOF'
const fs = require('node:fs');

function loadTodos(filePath) {
  if ("'!fs.existsSync(filePath)) {
    return [];
  }

  const raw = fs.readFileSync(filePath, '"'utf8').trim();
  if ("'!raw) {
    return [];
  }

  let todos;
  try {
    todos = JSON.parse(raw);
  } catch (error) {
    throw new Error(`Failed to parse todo data from ${filePath}.`);
  }

  if (!Array.isArray(todos)) {
    throw new Error(`Todo data at ${filePath} is invalid.`);
  }

  return todos;
}

function saveTodos(filePath, todos) {
  fs.writeFileSync(filePath, `${JSON.stringify(todos, null, 2)}'"\\n"'`, '"'utf8');
}

function getNextId(todos) {
  const maxId = todos.reduce((max, todo) => {
    if (typeof todo.id === 'number' && Number.isFinite(todo.id) && todo.id > max) {
      return todo.id;
    }
    return max;
  }, 0);

  return maxId + 1;
}

function addTodo(filePath, text) {
  const todos = loadTodos(filePath);
  const todo = {
    id: getNextId(todos),
    text,
    completed: false,
    createdAt: new Date().toISOString()
  };

  todos.push(todo);
  saveTodos(filePath, todos);
  return todo;
}

function listTodos(filePath) {
  return loadTodos(filePath);
}

function completeTodo(filePath, id) {
  const todos = loadTodos(filePath);
  const todo = todos.find((item) => item.id === id);

  if ("'!todo) {
    return { todo: null, alreadyCompleted: false };
  }

  const alreadyCompleted = Boolean(todo.completed);
  if (!alreadyCompleted) {
    todo.completed = true;
    todo.completedAt = new Date().toISOString();
    saveTodos(filePath, todos);
  }

  return { todo, alreadyCompleted };
}

function deleteTodo(filePath, id) {
  const todos = loadTodos(filePath);
  const index = todos.findIndex((item) => item.id === id);

  if (index === -1) {
    return null;
  }

  const [removed] = todos.splice(index, 1);
  saveTodos(filePath, todos);
  return removed;
}

module.exports = {
  addTodo,
  listTodos,
  completeTodo,
  deleteTodo
};
EOF
cat > src/cli.js <<'"'EOF'
const path = require('node:path');
const { addTodo, listTodos, completeTodo, deleteTodo } = require('./todoStore');

function resolveTodoFile(cwd) {
  return process.env.TODO_FILE || path.join(cwd, 'todos.json');
}

function parseId(value) {
  const id = Number.parseInt(value, 10);
  if ("'!Number.isInteger(id) || id <= 0) {
    return null;
  }
  return id;
}

function printHelp(stderr) {
  stderr.write('"'Usage:\\n');
  stderr.write('  todo add <text>\\n');
  stderr.write('  todo list\\n');
  stderr.write('  todo complete <id>\\n');
  stderr.write('  todo delete <id>\\n');
}

function run(argv, io = { stdout: process.stdout, stderr: process.stderr }, cwd = process.cwd()) {
  const [command, ...args] = argv;
  const filePath = resolveTodoFile(cwd);

  if ("'!command) {
    printHelp(io.stderr);
    return 1;
  }

  if (command === '"'add') {
    const text = args.join(' ').trim();
    if ("'!text) {
      io.stderr.write('"'Error: todo text is required.\\n');
      printHelp(io.stderr);
      return 1;
    }

    const todo = addTodo(filePath, text);
    io.stdout.write("'`Added todo ${todo.id}.'"\\n"'`);
    return 0;
  }

  if (command === '"'list') {
    const todos = listTodos(filePath);
    if (todos.length === 0) {
      io.stdout.write('No todos found.\\n');
      return 0;
    }

    for (const todo of todos) {
      const marker = todo.completed ? 'x' : ' ';
      io.stdout.write("'`[${marker}] ${todo.id}: ${todo.text}'"\\n"'`);
    }
    return 0;
  }

  if (command === '"'complete') {
    const id = parseId(args[0]);
    if ("'!id) {
      io.stderr.write('"'Error: valid todo id is required.\\n');
      printHelp(io.stderr);
      return 1;
    }

    const result = completeTodo(filePath, id);
    if ("'!result.todo) {
      io.stderr.write(`Todo ${id} not found.'"\\n"'`);
      return 1;
    }

    if (result.alreadyCompleted) {
      io.stdout.write(`Todo ${id} is already completed.'"\\n"'`);
      return 0;
    }

    io.stdout.write(`Completed todo ${id}.'"\\n"'`);
    return 0;
  }

  if (command === '"'delete') {
    const id = parseId(args[0]);
    if ("'!id) {
      io.stderr.write('"'Error: valid todo id is required.\\n');
      printHelp(io.stderr);
      return 1;
    }

    const removed = deleteTodo(filePath, id);
    if ("'!removed) {
      io.stderr.write(`Todo ${id} not found.'"\\n"'`);
      return 1;
    }

    io.stdout.write(`Deleted todo ${id}.'"\\n"'`);
    return 0;
  }

  io.stderr.write(`Unknown command: ${command}'"\\n"'`);
  printHelp(io.stderr);
  return 1;
}

module.exports = {
  run
};
EOF
cat > bin/todo.js <<'"'EOF'
#"'!/usr/bin/env node
const { run } = require('"'../src/cli');

process.exitCode = run(process.argv.slice(2));
EOF
cat > test/cli.test.js <<'EOF'
const test = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');
const os = require('node:os');
const path = require('node:path');
const { spawnSync } = require('node:child_process');

const binPath = path.resolve(__dirname, '..', 'bin', 'todo.js');

function makeTempDir() {
  return fs.mkdtempSync(path.join(os.tmpdir(), 'todo-cli-'));
}

function runCli(args, cwd, todoFileName = 'todos.json') {
  return spawnSync(process.execPath, [binPath, ...args], {
    cwd,
    env: {
      ...process.env,
      TODO_FILE: path.join(cwd, todoFileName)
    },
    encoding: 'utf8'
  });
}

test('add and list todos', () => {
  const cwd = makeTempDir();

  const add = runCli(['add', 'Buy milk'], cwd);
  assert.equal(add.status, 0);
  assert.match(add.stdout, /Added todo 1\\./);

  const list = runCli(['list'], cwd);
  assert.equal(list.status, 0);
  assert.match(list.stdout, /\\[ \\] 1: Buy milk/);

  const data = JSON.parse(fs.readFileSync(path.join(cwd, 'todos.json'), 'utf8'));
  assert.equal(data.length, 1);
  assert.equal(data[0].text, 'Buy milk');
  assert.equal(data[0].completed, false);
});

test('complete marks todo done', () => {
  const cwd = makeTempDir();

  assert.equal(runCli(['add', 'Write tests'], cwd).status, 0);
  const complete = runCli(['complete', '1'], cwd);
  assert.equal(complete.status, 0);
  assert.match(complete.stdout, /Completed todo 1\\./);

  const list = runCli(['list'], cwd);
  assert.match(list.stdout, /\\[x\\] 1: Write tests/);
});

test('delete removes todo', () => {
  const cwd = makeTempDir();

  assert.equal(runCli(['add', 'One'], cwd).status, 0);
  assert.equal(runCli(['add', 'Two'], cwd).status, 0);

  const del = runCli(['delete', '1'], cwd);
  assert.equal(del.status, 0);
  assert.match(del.stdout, /Deleted todo 1\\./);

  const list = runCli(['list'], cwd);
  assert.doesNotMatch(list.stdout, /1: One/);
  assert.match(list.stdout, /\\[ \\] 2: Two/);
});

test('errors for unknown command and missing todo', () => {
  const cwd = makeTempDir();

  const unknown = runCli(['wat'], cwd);
  assert.equal(unknown.status, 1);
  assert.match(unknown.stderr, /Unknown command: wat/);

  const missing = runCli(['complete', '999'], cwd);
  assert.equal(missing.status, 1);
  assert.match(missing.stderr, /Todo 999 not found\\./);
});
EOF
chmod +x bin/todo.js" in /tmp/agent-comparison/codex succeeded in 52ms:


thinking
**Running tests after update**
codex
Core files are in place. I’m running the test suite now to verify command behavior and JSON persistence before committing.

thinking
**Running version check and tests**
exec
/bin/zsh -lc 'node -v && npm test' in /tmp/agent-comparison/codex succeeded in 625ms:
TAP version 13
# Subtest: add and list todos
ok 1 - add and list todos
  ---
  duration_ms: 84.661042
  type: 'test'
  ...
# Subtest: complete marks todo done
ok 2 - complete marks todo done
  ---
  duration_ms: 126.809542
  type: 'test'
  ...
# Subtest: delete removes todo
ok 3 - delete removes todo
  ---
  duration_ms: 179.778125
  type: 'test'
  ...
# Subtest: errors for unknown command and missing todo

thinking
**Committing initial files with git**
codex
Tests pass. I’m staging all project files and creating the initial commit now.
exec
/bin/zsh -lc 'git add . && git commit -m "Build Node.js CLI todo app with tests"' in /tmp/agent-comparison/codex succeeded in 51ms:
[main (root-commit) b0f3322] Build Node.js CLI todo app with tests
 6 files changed, 308 insertions(+)
 create mode 100644 .gitignore
 create mode 100755 bin/todo.js
 create mode 100644 package.json
 create mode 100644 src/cli.js
 create mode 100644 src/todoStore.js
 create mode 100644 test/cli.test.js

thinking
**Finalizing summary with commit and usage**
exec
/bin/zsh -lc 'git status --short --branch' in /tmp/agent-comparison/codex succeeded in 51ms:
## main

thinking
**Summarizing final implementation and tests**
codex
Implemented a Node.js CLI todo app with JSON persistence and tests, and committed it to git.

- Commit: `b0f3322`
- App entrypoint: `bin/todo.js`
- CLI logic: `src/cli.js`
- Persistence layer: `src/todoStore.js`
- Tests: `test/cli.test.js`
- Project config/scripts: `package.json`

Supported commands:

- `todo add <text>`
- `todo list`
- `todo complete <id>`
- `todo delete <id>`

Notes:

- Todos persist to `todos.json` in the current working directory (or `TODO_FILE` if set).
- Test suite passes (`npm test`: 4/4 passing).
- Git repo was already initialized in this workspace, so I added files and created the first commit.
tokens used
7,047
Implemented a Node.js CLI todo app with JSON persistence and tests, and committed it to git.

- Commit: `b0f3322`
- App entrypoint: `bin/todo.js`
- CLI logic: `src/cli.js`
- Persistence layer: `src/todoStore.js`
- Tests: `test/cli.test.js`
- Project config/scripts: `package.json`

Supported commands:

- `todo add <text>`
- `todo list`
- `todo complete <id>`
- `todo delete <id>`

Notes:

- Todos persist to `todos.json` in the current working directory (or `TODO_FILE` if set).
- Test suite passes (`npm test`: 4/4 passing).
- Git repo was already initialized in this workspace, so I added files and created the first commit.
