diff --git a/packages/cli/src/auto-daemon.ts b/packages/cli/src/auto-daemon.ts
new file mode 100644
index 0000000..99fc48b
--- /dev/null
+++ b/packages/cli/src/auto-daemon.ts
@@ -0,0 +1,39 @@
+import { spawn } from 'node:child_process';
+import path from 'node:path';
+import { readPidfile, isProcessAlive } from '@visionl/daemon/dist/pidfile.js';
+import { VisionLClient } from '@visionl/core';
+
+const POLL_INTERVAL_MS = 100;
+const MAX_WAIT_MS = 3000;
+
+export async function ensureDaemonRunning(port: number): Promise<VisionLClient> {
+  const client = new VisionLClient(`http://127.0.0.1:${port}`);
+
+  if (await client.health()) {
+    return client;
+  }
+
+  const pidInfo = readPidfile();
+  if (pidInfo && isProcessAlive(pidInfo.pid)) {
+    if (await client.health()) {
+      return client;
+    }
+  }
+
+  const daemonEntryPath = path.resolve(__dirname, '../../daemon/dist/server.js');
+  spawn('node', [daemonEntryPath], {
+    env: { ...process.env, VISIONL_PORT: String(port) },
+    stdio: 'ignore',
+    detached: true,
+  }).unref();
+
+  const startTime = Date.now();
+  while (Date.now() - startTime < MAX_WAIT_MS) {
+    await new Promise((resolve) => setTimeout(resolve, POLL_INTERVAL_MS));
+    if (await client.health()) {
+      return client;
+    }
+  }
+
+  throw new Error('DAEMON_UNREACHABLE');
+}
diff --git a/packages/cli/src/index.ts b/packages/cli/src/index.ts
index 53f40e9..990fc2e 100644
--- a/packages/cli/src/index.ts
+++ b/packages/cli/src/index.ts
@@ -1,2 +1,166 @@
-// @visionl/cli — placeholder, to be implemented in Task 4
-export const CLI_VERSION = '0.1.0';
+#!/usr/bin/env node
+import { Command } from 'commander';
+import { ensureDaemonRunning } from './auto-daemon.js';
+import { safeStringify, VisionLClient } from '@visionl/core';
+
+const DEFAULT_PORT = 9527;
+
+const program = new Command();
+program.name('visionl').version('0.1.0');
+
+program.option('-p, --port <n>', 'daemon port', String(DEFAULT_PORT));
+program.option('--pretty', 'human-readable output');
+
+function getClient(): Promise<VisionLClient> {
+  const opts = program.opts<{ port: string }>();
+  const port = parseInt(opts.port, 10) || DEFAULT_PORT;
+  return ensureDaemonRunning(port);
+}
+
+function print(result: unknown): void {
+  const opts = program.opts<{ pretty: boolean }>();
+  if (opts.pretty) {
+    console.log(JSON.stringify(result, null, 2));
+  } else {
+    console.log(safeStringify(result));
+  }
+}
+
+// health — check daemon health
+program.command('health')
+  .description('Check daemon health')
+  .action(async () => {
+    const client = await getClient();
+    const ok = await client.health();
+    print({ ok });
+  });
+
+// pages — page management
+program.command('open <url>')
+  .description('Open a URL in a new page')
+  .option('-a, --alias <alias>', 'Page alias')
+  .option('-p, --profile <profile>', 'Browser profile')
+  .action(async (url: string, options: { alias?: string; profile?: string }) => {
+    const client = await getClient();
+    const result = await client.openPage(url, options.alias, options.profile);
+    print(result);
+  });
+
+program.command('list')
+  .description('List all open pages')
+  .action(async () => {
+    const client = await getClient();
+    const result = await client.listPages();
+    print(result);
+  });
+
+program.command('get <id>')
+  .description('Get page info by ID or alias')
+  .action(async (id: string) => {
+    const client = await getClient();
+    const result = await client.getPage(id);
+    print(result);
+  });
+
+program.command('kill <id>')
+  .description('Close a page by ID or alias')
+  .action(async (id: string) => {
+    const client = await getClient();
+    const result = await client.killPage(id);
+    print(result);
+  });
+
+// navigation — page interactions
+program.command('navigate <id> <url>')
+  .description('Navigate an existing page to a URL')
+  .action(async (id: string, url: string) => {
+    const client = await getClient();
+    const result = await client.navigate(id, url);
+    print(result);
+  });
+
+program.command('click <id> <selector>')
+  .description('Click an element on a page')
+  .action(async (id: string, selector: string) => {
+    const client = await getClient();
+    const result = await client.click(id, selector);
+    print(result);
+  });
+
+program.command('type <id> <selector> <text>')
+  .description('Type text into an element')
+  .action(async (id: string, selector: string, text: string) => {
+    const client = await getClient();
+    const result = await client.type(id, selector, text);
+    print(result);
+  });
+
+program.command('scroll <id>')
+  .description('Scroll on a page')
+  .option('-y, --delta-y <n>', 'Vertical scroll delta', '0')
+  .option('-b, --to-bottom', 'Scroll to bottom')
+  .action(async (id: string, options: { deltaY: string; toBottom?: boolean }) => {
+    const client = await getClient();
+    const result = await client.scroll(id, {
+      deltaY: parseInt(options.deltaY, 10) || undefined,
+      toBottom: options.toBottom,
+    });
+    print(result);
+  });
+
+program.command('eval <id> <code>')
+  .description('Evaluate JavaScript on a page')
+  .action(async (id: string, code: string) => {
+    const client = await getClient();
+    const result = await client.eval(id, code);
+    print(result);
+  });
+
+program.command('wait <id>')
+  .description('Wait for selector or duration on a page')
+  .option('-s, --selector <selector>', 'Wait for CSS selector')
+  .option('-m, --ms <ms>', 'Wait time in milliseconds')
+  .action(async (id: string, options: { selector?: string; ms?: string }) => {
+    const client = await getClient();
+    const result = await client.wait(id, {
+      selector: options.selector,
+      ms: options.ms ? parseInt(options.ms, 10) : undefined,
+    });
+    print(result);
+  });
+
+// content — page content retrieval
+program.command('screenshot <id>')
+  .description('Take a screenshot of a page (returns base64)')
+  .action(async (id: string) => {
+    const client = await getClient();
+    const result = await client.screenshot(id);
+    print(result);
+  });
+
+program.command('text <id>')
+  .description('Get the text content of a page')
+  .action(async (id: string) => {
+    const client = await getClient();
+    const result = await client.text(id);
+    print(result);
+  });
+
+program.command('html <id>')
+  .description('Get the HTML source of a page')
+  .action(async (id: string) => {
+    const client = await getClient();
+    const result = await client.html(id);
+    print(result);
+  });
+
+// profiles
+program.command('profiles')
+  .description('List available fingerprint profiles')
+  .action(async () => {
+    const client = await getClient();
+    const result = await client.getProfiles();
+    print(result);
+  });
+
+program.parse();
diff --git a/packages/cli/tsconfig.json b/packages/cli/tsconfig.json
index 2e1ad34..3da059b 100644
--- a/packages/cli/tsconfig.json
+++ b/packages/cli/tsconfig.json
@@ -5,5 +5,5 @@
     "rootDir": "./src"
   },
   "include": ["src"],
-  "references": [{ "path": "../core" }]
+  "references": [{ "path": "../core" }, { "path": "../daemon" }]
 }