diff --git a/cloud/takeover/takeover.go b/cloud/takeover/takeover.go
new file mode 100644
index 0000000..e340c56
--- /dev/null
+++ b/cloud/takeover/takeover.go
@@ -0,0 +1,226 @@
+// takeover is a self-contained executable which when executed loads the BMaaS
+// agent via kexec. It is intended to be called over SSH, given a binary
+// TakeoverInit message over standard input and (if all preparation work
+// completed successfully) will respond with a TakeoverResponse on standard
+// output. At that point the new kernel and agent initramfs are fully staged
+// by the current kernel.
+// The second stage which is also part of this binary, selected by an
+// environment variable, is then executed in detached mode and the main
+// takeover binary called over SSH terminates.
+// The second stage waits for 5 seconds for the main binary to exit, the SSH
+// session to be torn down and various other things before issuing the final
+// non-returning syscall which jumps into the new kernel.
+
+package main
+
+import (
+	"bytes"
+	"crypto/ed25519"
+	"crypto/rand"
+	_ "embed"
+	"errors"
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"os/exec"
+	"time"
+
+	"github.com/cavaliergopher/cpio"
+	"github.com/pierrec/lz4/v4"
+	"golang.org/x/sys/unix"
+	"google.golang.org/protobuf/proto"
+
+	"source.monogon.dev/cloud/agent/api"
+	"source.monogon.dev/metropolis/pkg/bootparam"
+	"source.monogon.dev/metropolis/pkg/kexec"
+	netdump "source.monogon.dev/net/dump"
+)
+
+//go:embed third_party/linux/bzImage
+var kernel []byte
+
+//go:embed ucode.cpio
+var ucode []byte
+
+//go:embed cloud/agent/initramfs.cpio.lz4
+var initramfs []byte
+
+// newMemfile creates a new file which is not located on a specific filesystem,
+// but is instead backed by anonymous memory.
+func newMemfile(name string, flags int) (*os.File, error) {
+	fd, err := unix.MemfdCreate(name, flags)
+	if err != nil {
+		return nil, fmt.Errorf("memfd_create failed: %w", err)
+	}
+	return os.NewFile(uintptr(fd), name), nil
+}
+
+func setupTakeover() (*api.TakeoverSuccess, error) {
+	// Read init specification from stdin.
+	initRaw, err := io.ReadAll(os.Stdin)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read TakeoverInit message from stdin: %w", err)
+	}
+	var takeoverInit api.TakeoverInit
+	if err := proto.Unmarshal(initRaw, &takeoverInit); err != nil {
+		return nil, fmt.Errorf("failed to parse TakeoverInit messag from stdin: %w", err)
+	}
+
+	// Sanity check for empty TakeoverInit messages
+	if takeoverInit.BmaasEndpoint == "" {
+		return nil, errors.New("BMaaS endpoint is empty, check that a proper TakeoverInit message has been provided")
+	}
+
+	// Load data from embedded files into memfiles as the kexec load syscall
+	// requires file descriptors.
+	kernelFile, err := newMemfile("kernel", 0)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create kernel memfile: %w", err)
+	}
+	initramfsFile, err := newMemfile("initramfs", 0)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create initramfs memfile: %w", err)
+	}
+	if _, err := kernelFile.ReadFrom(bytes.NewReader(kernel)); err != nil {
+		return nil, fmt.Errorf("failed to read kernel into memory-backed file: %w", err)
+	}
+	if _, err := initramfsFile.ReadFrom(bytes.NewReader(ucode)); err != nil {
+		return nil, fmt.Errorf("failed to read ucode into memory-backed file: %w", err)
+	}
+	if _, err := initramfsFile.ReadFrom(bytes.NewReader(initramfs)); err != nil {
+		return nil, fmt.Errorf("failed to read initramfs into memory-backed file: %w", err)
+	}
+
+	// Dump the current network configuration
+	netconf, warnings, err := netdump.Dump()
+	if err != nil {
+		return nil, fmt.Errorf("failed to dump network configuration: %w", err)
+	}
+
+	// Generate agent private key
+	pubKey, privKey, err := ed25519.GenerateKey(rand.Reader)
+	if err != nil {
+		return nil, fmt.Errorf("unable to generate Ed25519 key: %w", err)
+	}
+
+	agentInit := api.AgentInit{
+		TakeoverInit:  &takeoverInit,
+		PrivateKey:    privKey,
+		NetworkConfig: netconf,
+	}
+	agentInitRaw, err := proto.Marshal(&agentInit)
+	if err != nil {
+		return nil, fmt.Errorf("unable to marshal AgentInit message: %v", err)
+	}
+
+	// Append AgentInit spec to initramfs
+	compressedOut := lz4.NewWriter(initramfsFile)
+	compressedOut.Apply(lz4.LegacyOption(true))
+	cpioW := cpio.NewWriter(compressedOut)
+	cpioW.WriteHeader(&cpio.Header{
+		Name: "/init.pb",
+		Size: int64(len(agentInitRaw)),
+		Mode: cpio.TypeReg | 0o644,
+	})
+	cpioW.Write(agentInitRaw)
+	cpioW.Close()
+	compressedOut.Close()
+
+	agentParams := bootparam.Params{
+		bootparam.Param{Param: "quiet"},
+		bootparam.Param{Param: "init", Value: "/init"},
+		// Always add "default" console on x86
+		bootparam.Param{Param: "console", Value: "ttyS0,115200"},
+	}
+
+	cmdline, err := os.ReadFile("/proc/cmdline")
+	if err != nil {
+		warnings = append(warnings, fmt.Errorf("unable to read current kernel command line: %w", err))
+	} else {
+		params, _, err := bootparam.Unmarshal(string(cmdline))
+		// If the existing command line is well-formed, add all existing console
+		// parameters to the console for the agent
+		if err == nil {
+			for _, p := range params {
+				if p.Param == "console" {
+					agentParams = append(agentParams, p)
+				}
+			}
+		}
+	}
+	agentCmdline, err := bootparam.Marshal(agentParams, "")
+	// Stage agent payload into kernel memory
+	if err := kexec.FileLoad(kernelFile, initramfsFile, agentCmdline); err != nil {
+		return nil, fmt.Errorf("failed to load kexec payload: %w", err)
+	}
+	var warningsStrs []string
+	for _, w := range warnings {
+		warningsStrs = append(warningsStrs, w.Error())
+	}
+	return &api.TakeoverSuccess{
+		InitMessage: &takeoverInit,
+		Key:         pubKey,
+		Warning:     warningsStrs,
+	}, nil
+}
+
+// Environment variable which tells the takeover binary to run the second stage
+const detachedLaunchEnv = "TAKEOVER_DETACHED_LAUNCH"
+
+func main() {
+	// Check if the second stage should be executed
+	if os.Getenv(detachedLaunchEnv) == "1" {
+		// Wait 5 seconds for data to be sent, connections to be closed and
+		// syncs to be executed
+		time.Sleep(5 * time.Second)
+		// Perform kexec, this will not return unless it fails
+		err := unix.Reboot(unix.LINUX_REBOOT_CMD_KEXEC)
+		var msg string = "takeover: reboot succeeded, but we're still runing??"
+		if err != nil {
+			msg = err.Error()
+		}
+		// We have no standard output/error anymore, if this fails it's
+		// just borked. Attempt to dump the error into kmesg for manual
+		// debugging.
+		kmsg, err := os.OpenFile("/dev/kmsg", os.O_WRONLY, 0)
+		if err != nil {
+			os.Exit(2)
+		}
+		kmsg.WriteString(msg)
+		kmsg.Close()
+		os.Exit(1)
+	}
+
+	var takeoverResp api.TakeoverResponse
+	res, err := setupTakeover()
+	if err != nil {
+		takeoverResp.Result = &api.TakeoverResponse_Error{Error: &api.TakeoverError{
+			Message: err.Error(),
+		}}
+	} else {
+		takeoverResp.Result = &api.TakeoverResponse_Success{Success: res}
+	}
+	// Respond to stdout
+	takeoverRespRaw, err := proto.Marshal(&takeoverResp)
+	if err != nil {
+		log.Fatalf("failed to marshal response: %v", err)
+	}
+	if _, err := os.Stdout.Write(takeoverRespRaw); err != nil {
+		log.Fatalf("failed to write response to stdout: %v", err)
+	}
+	// Close stdout, we're done responding
+	os.Stdout.Close()
+
+	// Start second stage which waits for 5 seconds while performing
+	// final cleanup.
+	detachedCmd := exec.Command("/proc/self/exe")
+	detachedCmd.Env = []string{detachedLaunchEnv + "=1"}
+	if err := detachedCmd.Start(); err != nil {
+		log.Fatalf("failed to launch final stage: %v", err)
+	}
+	// Release the second stage so that the first stage can cleanly terminate.
+	if err := detachedCmd.Process.Release(); err != nil {
+		log.Fatalf("error releasing final stage process: %v", err)
+	}
+}