diff --git a/cmd/service/cmd.go b/cmd/service/cmd.go
new file mode 100644
index 0000000..cf7b99b
--- /dev/null
+++ b/cmd/service/cmd.go
@@ -0,0 +1,270 @@
+package service
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"syscall"
+	"time"
+
+	"forge.lthn.ai/core/cli/pkg/cli"
+	"forge.lthn.ai/core/go-process"
+	"forge.lthn.ai/core/go-scm/manifest"
+)
+
+// AddServiceCommands registers core start/stop/list/restart as top-level commands.
+func AddServiceCommands(root *cli.Command) {
+	startCmd := cli.NewCommand("start", "Start a project daemon",
+		"Reads .core/manifest.yaml and starts the named daemon (or the default).\n"+
+			"The daemon runs detached in the background.",
+		func(cmd *cli.Command, args []string) error {
+			return runStart(args)
+		},
+	)
+
+	stopCmd := cli.NewCommand("stop", "Stop a project daemon",
+		"Stops the named daemon for the current project, or all daemons if no name given.",
+		func(cmd *cli.Command, args []string) error {
+			return runStop(args)
+		},
+	)
+
+	listCmd := cli.NewCommand("list", "List running daemons",
+		"Shows all running daemons tracked in ~/.core/daemons/.",
+		func(cmd *cli.Command, args []string) error {
+			return runList()
+		},
+	)
+
+	restartCmd := cli.NewCommand("restart", "Restart a project daemon",
+		"Stops then starts the named daemon.",
+		func(cmd *cli.Command, args []string) error {
+			if err := runStop(args); err != nil {
+				return err
+			}
+			return runStart(args)
+		},
+	)
+
+	root.AddCommand(startCmd, stopCmd, listCmd, restartCmd)
+}
+
+func runStart(args []string) error {
+	m, projectDir, err := findManifest()
+	if err != nil {
+		return err
+	}
+
+	daemonName, spec, err := resolveDaemon(m, args)
+	if err != nil {
+		return err
+	}
+
+	reg := process.DefaultRegistry()
+
+	// Check if already running.
+	if _, ok := reg.Get(m.Code, daemonName); ok {
+		return fmt.Errorf("%s/%s is already running", m.Code, daemonName)
+	}
+
+	// Resolve binary.
+	binary := spec.Binary
+	if binary == "" {
+		return fmt.Errorf("daemon %q has no binary specified", daemonName)
+	}
+
+	binPath, err := exec.LookPath(binary)
+	if err != nil {
+		return fmt.Errorf("binary %q not found in PATH: %w", binary, err)
+	}
+
+	// Launch detached.
+	cmd := exec.Command(binPath, spec.Args...)
+	cmd.Dir = projectDir
+	cmd.Env = append(os.Environ(), "CORE_DAEMON=1")
+	cmd.Stdout = nil
+	cmd.Stderr = nil
+	cmd.Stdin = nil
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
+
+	if err := cmd.Start(); err != nil {
+		return fmt.Errorf("failed to start %s: %w", daemonName, err)
+	}
+
+	pid := cmd.Process.Pid
+	_ = cmd.Process.Release()
+
+	// Wait for health if configured.
+	health := spec.Health
+	if health != "" && health != "127.0.0.1:0" {
+		if process.WaitForHealth(health, 5000) {
+			cli.LogInfo(fmt.Sprintf("Started %s/%s (PID %d, health %s)", m.Code, daemonName, pid, health))
+		} else {
+			cli.LogInfo(fmt.Sprintf("Started %s/%s (PID %d, health not yet ready)", m.Code, daemonName, pid))
+		}
+	} else {
+		cli.LogInfo(fmt.Sprintf("Started %s/%s (PID %d)", m.Code, daemonName, pid))
+	}
+
+	// Register in the daemon registry.
+	if err := reg.Register(process.DaemonEntry{
+		Code:    m.Code,
+		Daemon:  daemonName,
+		PID:     pid,
+		Health:  health,
+		Project: projectDir,
+		Binary:  binPath,
+	}); err != nil {
+		cli.LogWarn(fmt.Sprintf("Daemon started but registry failed: %v", err))
+	}
+
+	return nil
+}
+
+func runStop(args []string) error {
+	reg := process.DefaultRegistry()
+
+	m, _, err := findManifest()
+	if err != nil {
+		return err
+	}
+
+	// If a specific daemon name was given, stop only that one.
+	if len(args) > 0 {
+		return stopDaemon(reg, m.Code, args[0])
+	}
+
+	// No args: stop all daemons for this project.
+	entries, err := reg.List()
+	if err != nil {
+		return err
+	}
+
+	stopped := 0
+	for _, e := range entries {
+		if e.Code == m.Code {
+			if err := stopDaemon(reg, e.Code, e.Daemon); err != nil {
+				cli.LogError(fmt.Sprintf("Failed to stop %s/%s: %v", e.Code, e.Daemon, err))
+			} else {
+				stopped++
+			}
+		}
+	}
+
+	if stopped == 0 {
+		cli.LogInfo("No running daemons for " + m.Code)
+	}
+
+	return nil
+}
+
+func stopDaemon(reg *process.Registry, code, daemon string) error {
+	entry, ok := reg.Get(code, daemon)
+	if !ok {
+		return fmt.Errorf("%s/%s is not running", code, daemon)
+	}
+
+	proc, err := os.FindProcess(entry.PID)
+	if err != nil {
+		return fmt.Errorf("process %d not found: %w", entry.PID, err)
+	}
+
+	if err := proc.Signal(syscall.SIGTERM); err != nil {
+		return fmt.Errorf("failed to signal PID %d: %w", entry.PID, err)
+	}
+
+	// Wait for process to exit, escalate to SIGKILL after 30s.
+	deadline := time.Now().Add(30 * time.Second)
+	for time.Now().Before(deadline) {
+		if _, still := reg.Get(code, daemon); !still {
+			cli.LogInfo(fmt.Sprintf("Stopped %s/%s (PID %d)", code, daemon, entry.PID))
+			return nil
+		}
+		time.Sleep(250 * time.Millisecond)
+	}
+
+	cli.LogWarn(fmt.Sprintf("%s/%s did not stop within 30s, sending SIGKILL", code, daemon))
+	_ = proc.Signal(syscall.SIGKILL)
+	_ = reg.Unregister(code, daemon)
+	cli.LogInfo(fmt.Sprintf("Killed %s/%s (PID %d)", code, daemon, entry.PID))
+	return nil
+}
+
+func runList() error {
+	reg := process.DefaultRegistry()
+	entries, err := reg.List()
+	if err != nil {
+		return err
+	}
+
+	if len(entries) == 0 {
+		fmt.Println("No running daemons")
+		return nil
+	}
+
+	fmt.Printf("%-20s %-12s %-8s %-24s %s\n", "CODE", "DAEMON", "PID", "HEALTH", "PROJECT")
+	for _, e := range entries {
+		project := e.Project
+		if project == "" {
+			project = "-"
+		}
+		fmt.Printf("%-20s %-12s %-8d %-24s %s\n", e.Code, e.Daemon, e.PID, e.Health, project)
+	}
+
+	return nil
+}
+
+// findManifest walks from cwd up to / looking for .core/manifest.yaml.
+func findManifest() (*manifest.Manifest, string, error) {
+	dir, err := os.Getwd()
+	if err != nil {
+		return nil, "", err
+	}
+
+	for {
+		path := filepath.Join(dir, ".core", "manifest.yaml")
+		data, err := os.ReadFile(path)
+		if err == nil {
+			m, err := manifest.Parse(data)
+			if err != nil {
+				return nil, "", fmt.Errorf("invalid manifest at %s: %w", path, err)
+			}
+			return m, dir, nil
+		}
+
+		parent := filepath.Dir(dir)
+		if parent == dir {
+			break
+		}
+		dir = parent
+	}
+
+	return nil, "", fmt.Errorf("no .core/manifest.yaml found (checked cwd and parent directories)")
+}
+
+// resolveDaemon finds the daemon entry by name or returns the default.
+func resolveDaemon(m *manifest.Manifest, args []string) (string, manifest.DaemonSpec, error) {
+	if len(args) > 0 {
+		name := args[0]
+		spec, ok := m.Daemons[name]
+		if !ok {
+			return "", manifest.DaemonSpec{}, fmt.Errorf("daemon %q not found in manifest (available: %v)", name, daemonNames(m))
+		}
+		return name, spec, nil
+	}
+
+	name, spec, ok := m.DefaultDaemon()
+	if !ok {
+		return "", manifest.DaemonSpec{}, fmt.Errorf("no default daemon in manifest (use: core start <name>)")
+	}
+	return name, spec, nil
+}
+
+func daemonNames(m *manifest.Manifest) []string {
+	var names []string
+	for name := range m.Daemons {
+		names = append(names, name)
+	}
+	return names
+}
diff --git a/main.go b/main.go
index ccbfa5f..e1be376 100644
--- a/main.go
+++ b/main.go
@@ -8,8 +8,32 @@ import (
 	"forge.lthn.ai/core/cli/cmd/module"
 	"forge.lthn.ai/core/cli/cmd/pkgcmd"
 	"forge.lthn.ai/core/cli/cmd/plugin"
+	"forge.lthn.ai/core/cli/cmd/service"
 	"forge.lthn.ai/core/cli/cmd/session"
 	"forge.lthn.ai/core/cli/pkg/cli"
+
+	// Ecosystem command packages — self-register via init() + cli.RegisterCommands()
+	_ "forge.lthn.ai/core/agent/cmd/agent"
+	_ "forge.lthn.ai/core/agent/cmd/dispatch"
+	_ "forge.lthn.ai/core/agent/cmd/taskgit"
+	_ "forge.lthn.ai/core/go-ansible/cmd/ansible"
+	_ "forge.lthn.ai/core/go-api/cmd/api"
+	_ "forge.lthn.ai/core/go-build/cmd/build"
+	_ "forge.lthn.ai/core/go-build/cmd/ci"
+	_ "forge.lthn.ai/core/go-build/cmd/sdk"
+	_ "forge.lthn.ai/core/go-container/cmd/vm"
+	_ "forge.lthn.ai/core/go-crypt/cmd/crypt"
+	_ "forge.lthn.ai/core/go-devops/cmd/deploy"
+	_ "forge.lthn.ai/core/go-devops/cmd/dev"
+	_ "forge.lthn.ai/core/go-devops/cmd/docs"
+	_ "forge.lthn.ai/core/go-devops/cmd/gitcmd"
+	_ "forge.lthn.ai/core/go-devops/cmd/setup"
+	_ "forge.lthn.ai/core/go-infra/cmd/monitor"
+	_ "forge.lthn.ai/core/go-infra/cmd/prod"
+	_ "forge.lthn.ai/core/go-scm/cmd/collect"
+	_ "forge.lthn.ai/core/go-scm/cmd/forge"
+	_ "forge.lthn.ai/core/go-scm/cmd/gitea"
+	_ "forge.lthn.ai/core/lint/cmd/qa"
 )
 
 func main() {
@@ -22,5 +46,6 @@ func main() {
 		cli.WithCommands("plugin", plugin.AddPluginCommands),
 		cli.WithCommands("session", session.AddSessionCommands),
 		cli.WithCommands("go", gocmd.AddGoCommands),
+		cli.WithCommands("service", service.AddServiceCommands),
 	)
 }