feat(embed): expose UI management on HindsightEmbedded

Add start_ui(), stop_ui(), is_ui_running(), and ui_url property
to HindsightEmbedded so the UI can be started programmatically:

  client = HindsightEmbedded(profile="myapp", ...)
  client.start_ui()  # starts daemon + UI
  print(client.ui_url)

hindsight-all/hindsight/embedded.py

@@ -34,7 +34,6 @@ Using context manager:
 """
 
 import logging
-import os
 import threading
 from typing import Optional
 
@@ -140,13 +139,17 @@ class HindsightEmbedded:
                 return
 
             if self._closed:
-                raise RuntimeError("Cannot use HindsightEmbedded after it has been closed")
+                raise RuntimeError(
+                    "Cannot use HindsightEmbedded after it has been closed"
+                )
 
             # Use embed manager interface for daemon management
             logger.info(f"Ensuring daemon is running for profile '{self.profile}'...")
             success = self._manager.ensure_running(self.config, self.profile)
             if not success:
-                raise RuntimeError(f"Failed to start daemon for profile '{self.profile}'")
+                raise RuntimeError(
+                    f"Failed to start daemon for profile '{self.profile}'"
+                )
 
             # Get daemon URL and create client
             daemon_url = self._manager.get_url(self.profile)
@@ -375,3 +378,45 @@ class HindsightEmbedded:
     def is_running(self) -> bool:
         """Check if the client is initialized."""
         return self._started and not self._closed and self._client is not None
+
+    def start_ui(self, ui_port: int | None = None, hostname: str = "0.0.0.0") -> bool:
+        """Start the control plane web UI.
+
+        The daemon is started automatically if not already running.
+
+        Args:
+            ui_port: Port for the UI. Defaults to daemon_port + 10000.
+            hostname: Hostname to bind to. Defaults to 0.0.0.0.
+
+        Returns:
+            True if UI started successfully.
+        """
+        self._ensure_started()
+        return self._manager.start_ui(self.profile, ui_port, hostname)
+
+    def stop_ui(self, ui_port: int | None = None) -> bool:
+        """Stop the control plane web UI.
+
+        Args:
+            ui_port: Port the UI is running on. Defaults to daemon_port + 10000.
+
+        Returns:
+            True if stopped successfully.
+        """
+        return self._manager.stop_ui(self.profile, ui_port)
+
+    def is_ui_running(self, ui_port: int | None = None) -> bool:
+        """Check if the control plane web UI is running.
+
+        Args:
+            ui_port: Port to check. Defaults to daemon_port + 10000.
+
+        Returns:
+            True if UI is running and responsive.
+        """
+        return self._manager.is_ui_running(self.profile, ui_port)
+
+    @property
+    def ui_url(self) -> str:
+        """Get the UI URL for this profile."""
+        return self._manager.get_ui_url(self.profile)

hindsight-embed/hindsight_embed/cli.py

@@ -683,6 +683,167 @@ def do_daemon(args, config: dict, logger):
         return 1
 
 
+def do_ui(args, config: dict, logger):
+    """Handle UI subcommands."""
+    from . import daemon_client
+    from .profile_manager import UI_PORT_OFFSET, ProfileManager
+
+    profile = args.profile
+    ui_port = getattr(args, "port", None)
+    hostname = getattr(args, "hostname", "0.0.0.0")
+
+    # Resolve default UI port
+    pm = ProfileManager()
+    paths = pm.resolve_profile_paths(profile or "")
+    default_ui_port = paths.port + UI_PORT_OFFSET
+
+    if args.ui_command == "start":
+        from rich.console import Console
+        from rich.panel import Panel
+        from rich.text import Text
+
+        console = Console()
+
+        effective_port = ui_port or default_ui_port
+
+        if daemon_client.is_ui_running(profile, effective_port):
+            title = (
+                f"[bold yellow]UI Already Running[/bold yellow] [dim]({profile or 'default'} @ :{effective_port})[/dim]"
+            )
+            console.print(
+                Panel(
+                    Text("UI is already running", style="yellow"),
+                    title=title,
+                    border_style="yellow",
+                )
+            )
+            return 0
+
+        # Ensure daemon is running first
+        if not daemon_client.is_daemon_running(profile):
+            console.print("[dim]Daemon not running, starting it first...[/dim]")
+            if not daemon_client.ensure_daemon_running(config, profile):
+                console.print(
+                    Panel(
+                        Text("Failed to start daemon (required for UI)", style="red"),
+                        title="[bold red]✗ Error[/bold red]",
+                        border_style="red",
+                    )
+                )
+                return 1
+
+        if daemon_client.start_ui(profile, ui_port, hostname):
+            return 0
+        else:
+            return 1
+
+    elif args.ui_command == "stop":
+        from rich.console import Console
+        from rich.panel import Panel
+        from rich.text import Text
+
+        console = Console()
+        effective_port = ui_port or default_ui_port
+
+        if not daemon_client.is_ui_running(profile, effective_port):
+            title = f"[bold]UI Status[/bold] [dim]({profile or 'default'})[/dim]"
+            console.print(
+                Panel(
+                    Text("UI is not running", style="dim"),
+                    title=title,
+                    border_style="dim",
+                )
+            )
+            return 0
+
+        if daemon_client.stop_ui(profile, ui_port):
+            title = f"[bold green]✓ UI Stopped[/bold green] [dim]({profile or 'default'})[/dim]"
+            console.print(
+                Panel(
+                    Text("UI stopped successfully", style="green"),
+                    title=title,
+                    border_style="green",
+                )
+            )
+            return 0
+        else:
+            console.print(
+                Panel(
+                    Text("Failed to stop UI", style="red"),
+                    title="[bold red]✗ Error[/bold red]",
+                    border_style="red",
+                )
+            )
+            return 1
+
+    elif args.ui_command == "status":
+        from rich.console import Console
+        from rich.panel import Panel
+        from rich.text import Text
+
+        console = Console()
+        effective_port = ui_port or default_ui_port
+
+        if daemon_client.is_ui_running(profile, effective_port):
+            status_text = Text()
+            status_text.append("UI is running\n\n", style="green bold")
+            status_text.append("  URL: ", style="dim")
+            status_text.append(f"http://127.0.0.1:{effective_port}\n", style="cyan")
+            status_text.append("  Logs: ", style="dim")
+            status_text.append(f"{paths.ui_log}", style="")
+
+            title = f"[bold green]✓ UI Running[/bold green] [dim]({profile or 'default'} @ :{effective_port})[/dim]"
+            console.print(
+                Panel(
+                    status_text,
+                    title=title,
+                    border_style="green",
+                    padding=(1, 2),
+                )
+            )
+            return 0
+        else:
+            title = f"[bold]UI Status[/bold] [dim]({profile or 'default'})[/dim]"
+            console.print(
+                Panel(
+                    Text("UI is not running", style="dim"),
+                    title=title,
+                    border_style="dim",
+                )
+            )
+            return 1
+
+    elif args.ui_command == "logs":
+        ui_log_path = paths.ui_log
+        if not ui_log_path.exists():
+            print("No UI logs found", file=sys.stderr)
+            print(f"  Expected at: {ui_log_path}")
+            return 1
+
+        if args.follow:
+            import subprocess
+
+            try:
+                subprocess.run(["tail", "-f", str(ui_log_path)])
+            except KeyboardInterrupt:
+                pass
+            return 0
+        else:
+            try:
+                with open(ui_log_path) as f:
+                    lines = f.readlines()
+                    for line in lines[-args.lines :]:
+                        print(line, end="")
+                return 0
+            except Exception as e:
+                print(f"Error reading logs: {e}", file=sys.stderr)
+                return 1
+
+    else:
+        print("Usage: hindsight-embed ui {start|stop|status|logs}", file=sys.stderr)
+        return 1
+
+
 def _do_configure_profile_with_env(profile_name: str, port: int | None, env_vars: list[str]) -> int:
     """Configure a named profile with environment variables (non-interactive).
 
@@ -1247,6 +1408,30 @@ def main():
             exit_code = do_daemon(args, config, logger)
             sys.exit(exit_code)
 
+        # Handle UI subcommands
+        if command == "ui":
+            parser = argparse.ArgumentParser(prog="hindsight-embed ui")
+            subparsers = parser.add_subparsers(dest="ui_command")
+            start_parser = subparsers.add_parser("start", help="Start the UI")
+            start_parser.add_argument("--port", type=int, help="Port for the UI (default: daemon_port + 10000)")
+            start_parser.add_argument(
+                "--hostname", "-H", default="0.0.0.0", help="Hostname to bind to (default: 0.0.0.0)"
+            )
+            stop_parser = subparsers.add_parser("stop", help="Stop the UI")
+            stop_parser.add_argument("--port", type=int, help="Port the UI is running on")
+            status_parser = subparsers.add_parser("status", help="Check UI status")
+            status_parser.add_argument("--port", type=int, help="Port to check")
+            logs_parser = subparsers.add_parser("logs", help="View UI logs")
+            logs_parser.add_argument("--follow", "-f", action="store_true")
+            logs_parser.add_argument("--lines", "-n", type=int, default=50)
+
+            args = parser.parse_args(remaining_args[1:])
+            args.profile = global_profile
+            logger = setup_logging(False)
+            config = get_config()
+            exit_code = do_ui(args, config, logger)
+            sys.exit(exit_code)
+
         # Handle --help / -h
         if command in ("--help", "-h"):
             print_help()
@@ -1305,6 +1490,12 @@ Daemon management:
     daemon status          Check daemon status
     daemon logs [-f] [-n]  View daemon logs
 
+UI (control plane):
+    ui start [--port PORT] [--hostname HOST]  Start the web UI (default port: daemon_port + 10000)
+    ui stop [--port PORT]                     Stop the web UI
+    ui status [--port PORT]                   Check UI status
+    ui logs [-f] [-n]                         View UI logs
+
 CLI commands (forwarded to hindsight-cli):
     memory retain <bank> <content>   Store a memory
     memory recall <bank> <query>     Search memories

hindsight-embed/hindsight_embed/daemon_client.py

@@ -104,6 +104,67 @@ def is_daemon_running(profile: str | None = None) -> bool:
     return _manager.is_running(profile)
 
 
+def start_ui(profile: str | None = None, ui_port: int | None = None, hostname: str = "0.0.0.0") -> bool:
+    """Start the control plane UI.
+
+    Args:
+        profile: Profile name (None = resolve from priority).
+        ui_port: Port for the UI. Defaults to daemon_port + 10000.
+        hostname: Hostname to bind to. Defaults to 0.0.0.0.
+
+    Returns:
+        True if UI started successfully.
+    """
+    if profile is None:
+        profile = resolve_active_profile()
+    return _manager.start_ui(profile, ui_port, hostname)
+
+
+def stop_ui(profile: str | None = None, ui_port: int | None = None) -> bool:
+    """Stop the control plane UI.
+
+    Args:
+        profile: Profile name (None = resolve from priority).
+        ui_port: Port the UI is running on. Defaults to daemon_port + 10000.
+
+    Returns:
+        True if UI stopped successfully.
+    """
+    if profile is None:
+        profile = resolve_active_profile()
+    return _manager.stop_ui(profile, ui_port)
+
+
+def is_ui_running(profile: str | None = None, ui_port: int | None = None) -> bool:
+    """Check if the UI is running.
+
+    Args:
+        profile: Profile name (None = resolve from priority).
+        ui_port: Port to check. Defaults to daemon_port + 10000.
+
+    Returns:
+        True if UI is running and responsive.
+    """
+    if profile is None:
+        profile = resolve_active_profile()
+    return _manager.is_ui_running(profile, ui_port)
+
+
+def get_ui_url(profile: str | None = None, ui_port: int | None = None) -> str:
+    """Get UI URL for a profile.
+
+    Args:
+        profile: Profile name (None = resolve from priority).
+        ui_port: Port for the UI. Defaults to daemon_port + 10000.
+
+    Returns:
+        URL for the UI.
+    """
+    if profile is None:
+        profile = resolve_active_profile()
+    return _manager.get_ui_url(profile, ui_port)
+
+
 def find_cli_binary() -> Path | None:
     """Find the hindsight CLI binary in known locations or PATH."""
     import shutil

hindsight-embed/hindsight_embed/daemon_embed_manager.py

@@ -20,7 +20,7 @@ from rich.panel import Panel
 from rich.text import Text
 
 from .embed_manager import EmbedManager
-from .profile_manager import ProfileManager, resolve_active_profile
+from .profile_manager import UI_PORT_OFFSET, ProfileManager, resolve_active_profile
 
 logger = logging.getLogger(__name__)
 console = Console(stderr=True)
@@ -322,6 +322,219 @@ class DaemonEmbedManager(EmbedManager):
         except Exception as e:
             logger.debug(f"Failed to register profile '{profile}' in metadata: {e}")
 
+    def _find_ui_command(self) -> list[str]:
+        """Find the command to run the control plane UI."""
+        # Check if we're in development mode (monorepo)
+        dev_cp_path = Path(__file__).parent.parent.parent / "hindsight-control-plane"
+        cli_js = dev_cp_path / "bin" / "cli.js"
+        if cli_js.exists():
+            return ["node", str(cli_js)]
+
+        # Use npx to run the published control plane package
+        from . import __version__
+
+        cp_version = os.getenv("HINDSIGHT_EMBED_CP_VERSION", __version__)
+        return ["npx", f"@vectorize-io/hindsight-control-plane@{cp_version}"]
+
+    def get_ui_url(self, profile: str, ui_port: int | None = None, hostname: str | None = None) -> str:
+        """Get the URL for the UI serving this profile."""
+        if ui_port is None:
+            paths = self._profile_manager.resolve_profile_paths(profile)
+            ui_port = paths.port + UI_PORT_OFFSET
+        host = hostname or "0.0.0.0"
+        return f"http://{host}:{ui_port}"
+
+    def is_ui_running(self, profile: str, ui_port: int | None = None) -> bool:
+        """Check if the UI is running and responsive."""
+        # Always health-check on 127.0.0.1 regardless of bind hostname
+        ui_url = self.get_ui_url(profile, ui_port, hostname="127.0.0.1")
+        try:
+            with httpx.Client(timeout=2) as client:
+                response = client.get(f"{ui_url}/api/health")
+                return response.status_code == 200
+        except Exception:
+            return False
+
+    def start_ui(self, profile: str, ui_port: int | None = None, hostname: str = "0.0.0.0") -> bool:
+        """Start the control plane UI in background.
+
+        Args:
+            profile: Profile name.
+            ui_port: Port for the UI. Defaults to daemon_port + 10000.
+            hostname: Hostname to bind to. Defaults to 0.0.0.0.
+
+        Returns:
+            True if UI started successfully.
+        """
+        paths = self._profile_manager.resolve_profile_paths(profile)
+        if ui_port is None:
+            ui_port = paths.port + UI_PORT_OFFSET
+
+        if self.is_ui_running(profile, ui_port):
+            logger.debug(f"UI already running for profile '{profile}' on port {ui_port}")
+            return True
+
+        profile_label = f"profile '{profile}'" if profile else "default profile"
+        api_url = self.get_url(profile)
+        ui_log = paths.ui_log
+
+        # Build environment
+        env = os.environ.copy()
+        env["PORT"] = str(ui_port)
+        env["HOSTNAME"] = hostname
+        env["HINDSIGHT_CP_DATAPLANE_API_URL"] = api_url
+
+        # Create log directory
+        ui_log.parent.mkdir(parents=True, exist_ok=True)
+
+        # Build command
+        cmd = self._find_ui_command() + [
+            "--port",
+            str(ui_port),
+            "--hostname",
+            hostname,
+            "--api-url",
+            api_url,
+        ]
+
+        try:
+            log_file = open(ui_log, "w")
+            subprocess.Popen(
+                cmd,
+                env=env,
+                start_new_session=True,
+                stdout=log_file,
+                stderr=log_file,
+            )
+
+            # Wait for UI to be ready
+            start_time = time.time()
+            title = f"[bold cyan]Starting UI[/bold cyan] [dim]({profile or 'default'} @ :{ui_port})[/dim]"
+            log_lines = [f"Starting UI for {profile_label}...", ""]
+
+            with Live(console=console, auto_refresh=False) as live:
+                content = Text("\n".join(log_lines), style="dim")
+                panel = Panel(content, title=title, border_style="cyan", padding=(1, 2))
+                live.update(panel)
+                live.refresh()
+
+                while time.time() - start_time < 30:
+                    if self.is_ui_running(profile, ui_port):
+                        log_lines.append(f"✓ UI started at http://127.0.0.1:{ui_port}")
+                        log_lines.append(f"Logs: {ui_log}")
+                        content = Text("\n".join(log_lines), style="dim")
+                        success_title = (
+                            f"[bold green]✓ UI Started[/bold green] [dim]({profile or 'default'} @ :{ui_port})[/dim]"
+                        )
+                        panel = Panel(content, title=success_title, border_style="green", padding=(1, 2))
+                        live.update(panel)
+                        live.refresh()
+                        console.print()
+                        return True
+
+                    elapsed = int(time.time() - start_time)
+                    status_msg = f"⏳ Waiting for UI... ({elapsed}s elapsed)"
+                    if log_lines and log_lines[-1].startswith("⏳"):
+                        log_lines[-1] = status_msg
+                    else:
+                        log_lines.append(status_msg)
+
+                    content = Text("\n".join(log_lines), style="dim")
+                    panel = Panel(content, title=title, border_style="cyan", padding=(1, 2))
+                    live.update(panel)
+                    live.refresh()
+                    time.sleep(0.5)
+
+            # Timeout
+            console.print(
+                Panel(
+                    Text(f"UI failed to start (timeout)\n\nSee full log: {ui_log}", style="dim"),
+                    title=f"[bold red]✗ UI Failed (Timeout)[/bold red] [dim](:{ui_port})[/dim]",
+                    border_style="red",
+                    padding=(1, 2),
+                )
+            )
+            console.print()
+            return False
+
+        except FileNotFoundError:
+            error_msg = (
+                f"Command not found: {cmd[0]}\nFull command: {' '.join(cmd)}\n\nInstall Node.js and npx to run the UI."
+            )
+            console.print(
+                Panel(
+                    Text(error_msg, style="red"),
+                    title="[bold red]✗ Command Not Found[/bold red]",
+                    border_style="red",
+                    padding=(1, 2),
+                )
+            )
+            console.print()
+            return False
+        except Exception as e:
+            error_msg = f"Failed to start UI: {e}\n\nCommand: {' '.join(cmd)}\nLog file: {ui_log}"
+            console.print(
+                Panel(
+                    Text(error_msg, style="red"),
+                    title="[bold red]✗ UI Startup Error[/bold red]",
+                    border_style="red",
+                    padding=(1, 2),
+                )
+            )
+            console.print()
+            return False
+
+    def stop_ui(self, profile: str, ui_port: int | None = None) -> bool:
+        """Stop the UI for this profile.
+
+        Args:
+            profile: Profile name.
+            ui_port: Port the UI is running on. Defaults to daemon_port + 10000.
+
+        Returns:
+            True if stopped successfully.
+        """
+        paths = self._profile_manager.resolve_profile_paths(profile)
+        if ui_port is None:
+            ui_port = paths.port + UI_PORT_OFFSET
+
+        if not self.is_ui_running(profile, ui_port):
+            logger.debug(f"UI not running for profile '{profile}'")
+            return True
+
+        # Find PID by port
+        try:
+            result = subprocess.run(
+                ["lsof", "-ti", f":{ui_port}", "-sTCP:LISTEN"],
+                capture_output=True,
+                text=True,
+                timeout=5,
+            )
+            if result.returncode == 0 and result.stdout.strip():
+                pid = int(result.stdout.strip().split()[0])
+                logger.debug(f"Found UI PID {pid} on port {ui_port}")
+                os.kill(pid, 15)
+
+                # Wait for process to exit
+                for _ in range(50):
+                    time.sleep(0.1)
+                    try:
+                        os.kill(pid, 0)
+                    except OSError:
+                        break
+            else:
+                logger.warning(f"Could not find PID for UI port {ui_port}")
+        except (subprocess.TimeoutExpired, ValueError, OSError, FileNotFoundError) as e:
+            logger.warning(f"Could not find/kill UI by port: {e}")
+
+        # Wait for health check to fail
+        for _ in range(30):
+            if not self.is_ui_running(profile, ui_port):
+                return True
+            time.sleep(0.1)
+
+        return not self.is_ui_running(profile, ui_port)
+
     def ensure_running(self, config: dict, profile: str) -> bool:
         """
         Ensure daemon is running, starting it if needed.

hindsight-embed/hindsight_embed/profile_manager.py

@@ -28,6 +28,10 @@ PROFILE_PORT_BASE = 8889
 PROFILE_PORT_RANGE = 1000  # 8889-9888
 
 
+# UI port offset from daemon port (e.g., daemon 8888 -> UI 18888)
+UI_PORT_OFFSET = 10000
+
+
 @dataclass
 class ProfilePaths:
     """Paths and port for a profile."""
@@ -36,6 +40,11 @@ class ProfilePaths:
     lock: Path
     log: Path
     port: int
+    ui_log: Path = None  # type: ignore[assignment]
+
+    def __post_init__(self):
+        if self.ui_log is None:
+            self.ui_log = self.log.parent / self.log.name.replace(".log", ".ui.log")
 
 
 @dataclass