diff --git a/common/spinner.py b/common/spinner.py
index 1232371d..3ef60312 100644
--- a/common/spinner.py
+++ b/common/spinner.py
@@ -24,6 +24,9 @@ class Spinner():
       except BrokenPipeError:
         pass
 
+  def update_progress(self, cur, total):
+    self.update(str(int(100 * cur / total)))
+
   def close(self):
     if self.spinner_proc is not None:
       try:
diff --git a/installer/updater/update_agnos.json b/installer/updater/update_agnos.json
new file mode 100644
index 00000000..533fb0bb
--- /dev/null
+++ b/installer/updater/update_agnos.json
@@ -0,0 +1,18 @@
+[
+  {
+    "name": "system",
+    "url": "https://commadist.azureedge.net/agnosupdate-staging/system-1e5748c84d9b48bbe599c88da63e46b7ed1c0f1245486cfbcfb05399bd16dbb6.img.xz",
+    "hash": "de6afb8651dc011fed8a883bac191e61d4b58e2e1c84c2717816b64f71afd3b1",
+    "hash_raw": "1e5748c84d9b48bbe599c88da63e46b7ed1c0f1245486cfbcfb05399bd16dbb6",
+    "size": 10737418240,
+    "sparse": true
+  },
+  {
+    "name": "boot",
+    "url": "https://commadist.azureedge.net/agnosupdate-staging/boot-21649cb35935a92776155e7bb23e437e7e7eb0500c082df89f59a6d4a4ed639a.img.xz",
+    "hash": "21649cb35935a92776155e7bb23e437e7e7eb0500c082df89f59a6d4a4ed639a",
+    "hash_raw": "21649cb35935a92776155e7bb23e437e7e7eb0500c082df89f59a6d4a4ed639a",
+    "size": 14678016,
+    "sparse": false
+  }
+]
diff --git a/launch_chffrplus.sh b/launch_chffrplus.sh
index 8fe3cbf6..e52fa6db 100755
--- a/launch_chffrplus.sh
+++ b/launch_chffrplus.sh
@@ -8,11 +8,6 @@ source "$BASEDIR/launch_env.sh"
 
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )"
 
-function tici_init {
-  sudo su -c 'echo "performance" > /sys/class/devfreq/soc:qcom,memlat-cpu0/governor'
-  sudo su -c 'echo "performance" > /sys/class/devfreq/soc:qcom,memlat-cpu4/governor'
-}
-
 function two_init {
   # Wifi scan
   wpa_cli IFNAME=wlan0 SCAN
@@ -110,6 +105,62 @@ function two_init {
   fi
 }
 
+function tici_init {
+  sudo su -c 'echo "performance" > /sys/class/devfreq/soc:qcom,memlat-cpu0/governor'
+  sudo su -c 'echo "performance" > /sys/class/devfreq/soc:qcom,memlat-cpu4/governor'
+
+  # set success flag for current boot slot
+  sudo abctl --set_success
+
+  # Check if AGNOS update is required
+  if [ $(< /VERSION) != "$AGNOS_VERSION" ]; then
+    # Get number of slot to switch to
+    CUR_SLOT=$(abctl --boot_slot)
+    if [[ "$CUR_SLOT" == "_a" ]]; then
+      OTHER_SLOT="_b"
+      OTHER_SLOT_NUMBER="1"
+    else
+      OTHER_SLOT="_a"
+      OTHER_SLOT_NUMBER="0"
+    fi
+    echo "Cur slot $CUR_SLOT, target $OTHER_SLOT"
+
+    # Get expected hashes from manifest
+    MANIFEST="$DIR/installer/updater/update_agnos.json"
+    SYSTEM_HASH_EXPECTED=$(jq -r ".[] | select(.name == \"system\") | .hash_raw" $MANIFEST)
+    SYSTEM_SIZE=$(jq -r ".[] | select(.name == \"system\") | .size" $MANIFEST)
+    BOOT_HASH_EXPECTED=$(jq -r ".[] | select(.name == \"boot\") | .hash_raw" $MANIFEST)
+    BOOT_SIZE=$(jq -r ".[] | select(.name == \"boot\") | .size" $MANIFEST)
+    echo "Expected hashes:"
+    echo "System: $SYSTEM_HASH_EXPECTED"
+    echo "Boot: $BOOT_HASH_EXPECTED"
+
+    # Read hashes from alternate partitions, should already be flashed by updated
+    SYSTEM_HASH=$(dd if="/dev/disk/by-partlabel/system$OTHER_SLOT" bs=1 skip="$SYSTEM_SIZE" count=64 2>/dev/null)
+    BOOT_HASH=$(dd if="/dev/disk/by-partlabel/boot$OTHER_SLOT" bs=1 skip="$BOOT_SIZE" count=64 2>/dev/null)
+    echo "Found hashes:"
+    echo "System: $SYSTEM_HASH"
+    echo "Boot: $BOOT_HASH"
+
+    if [[ "$SYSTEM_HASH" == "$SYSTEM_HASH_EXPECTED" && "$BOOT_HASH" == "$BOOT_HASH_EXPECTED" ]]; then
+      echo "Swapping active slot to $OTHER_SLOT_NUMBER"
+      abctl --set_active "$OTHER_SLOT_NUMBER"
+
+      sleep 1
+      sudo reboot
+    else
+      echo "Hash mismatch, downloading agnos"
+      if $DIR/selfdrive/hardware/tici/agnos.py $MANIFEST; then
+        echo "Download done, swapping active slot to $OTHER_SLOT_NUMBER"
+        abctl --set_active "$OTHER_SLOT_NUMBER"
+      fi
+
+      sleep 1
+      sudo reboot
+    fi
+  fi
+}
+
 function launch {
   # Remove orphaned git lock if it exists on boot
   [ -f "$DIR/.git/index.lock" ] && rm -f $DIR/.git/index.lock
@@ -153,17 +204,17 @@ function launch {
     fi
   fi
 
-  # comma two init
+  # handle pythonpath
+  ln -sfn $(pwd) /data/pythonpath
+  export PYTHONPATH="$PWD"
+
+  # hardware specific init
   if [ -f /EON ]; then
     two_init
   elif [ -f /TICI ]; then
     tici_init
   fi
 
-  # handle pythonpath
-  ln -sfn $(pwd) /data/pythonpath
-  export PYTHONPATH="$PWD"
-
   # write tmux scrollback to a file
   tmux capture-pane -pq -S-1000 > /tmp/launch_log
 
diff --git a/launch_env.sh b/launch_env.sh
index ca8f4e8a..cb3c241d 100755
--- a/launch_env.sh
+++ b/launch_env.sh
@@ -10,6 +10,10 @@ if [ -z "$REQUIRED_NEOS_VERSION" ]; then
   export REQUIRED_NEOS_VERSION="15-1"
 fi
 
+if [ -z "$AGNOS_VERSION" ]; then
+  export AGNOS_VERSION="0.1"
+fi
+
 if [ -z "$PASSIVE" ]; then
   export PASSIVE="1"
 fi
diff --git a/release/files_common b/release/files_common
index f53abcf8..3b4fba19 100644
--- a/release/files_common
+++ b/release/files_common
@@ -277,6 +277,7 @@ selfdrive/hardware/eon/hardware.py
 selfdrive/hardware/tici/__init__.py
 selfdrive/hardware/tici/hardware.py
 selfdrive/hardware/tici/pins.py
+selfdrive/hardware/tici/agnos.py
 selfdrive/hardware/pc/__init__.py
 selfdrive/hardware/pc/hardware.py
 
diff --git a/selfdrive/hardware/base.py b/selfdrive/hardware/base.py
index 24163a12..75b1f4d9 100644
--- a/selfdrive/hardware/base.py
+++ b/selfdrive/hardware/base.py
@@ -24,6 +24,10 @@ class HardwareBase:
   def uninstall(self):
     pass
 
+  @abstractmethod
+  def get_os_version(self):
+    pass
+
   @abstractmethod
   def get_sound_card_online(self):
     pass
diff --git a/selfdrive/hardware/eon/hardware.py b/selfdrive/hardware/eon/hardware.py
index 231b5ba6..66d3da29 100644
--- a/selfdrive/hardware/eon/hardware.py
+++ b/selfdrive/hardware/eon/hardware.py
@@ -61,6 +61,10 @@ def getprop(key):
 
 
 class Android(HardwareBase):
+  def get_os_version(self):
+    with open("/VERSION") as f:
+      return f.read().strip()
+
   def get_sound_card_online(self):
     return (os.path.isfile('/proc/asound/card0/state') and
             open('/proc/asound/card0/state').read().strip() == 'ONLINE')
diff --git a/selfdrive/hardware/pc/hardware.py b/selfdrive/hardware/pc/hardware.py
index 181de110..2345c722 100644
--- a/selfdrive/hardware/pc/hardware.py
+++ b/selfdrive/hardware/pc/hardware.py
@@ -8,6 +8,9 @@ NetworkStrength = log.ThermalData.NetworkStrength
 
 
 class Pc(HardwareBase):
+  def get_os_version(self):
+    return None
+
   def get_sound_card_online(self):
     return True
 
diff --git a/selfdrive/hardware/tici/agnos.py b/selfdrive/hardware/tici/agnos.py
new file mode 100755
index 00000000..749d5149
--- /dev/null
+++ b/selfdrive/hardware/tici/agnos.py
@@ -0,0 +1,149 @@
+#!/usr/bin/env python3
+import json
+import lzma
+import hashlib
+import requests
+import struct
+import subprocess
+import os
+
+from common.spinner import Spinner
+
+
+class StreamingDecompressor:
+  def __init__(self, url):
+    self.buf = b""
+
+    self.req = requests.get(url, stream=True, headers={'Accept-Encoding': None})
+    self.it = self.req.iter_content(chunk_size=1024 * 1024)
+    self.decompressor = lzma.LZMADecompressor(format=lzma.FORMAT_AUTO)
+    self.eof = False
+    self.sha256 = hashlib.sha256()
+
+  def read(self, length):
+    while len(self.buf) < length:
+      self.req.raise_for_status()
+
+      try:
+        compressed = next(self.it)
+      except StopIteration:
+        self.eof = True
+        break
+      out = self.decompressor.decompress(compressed)
+      self.buf += out
+
+    result = self.buf[:length]
+    self.buf = self.buf[length:]
+
+    self.sha256.update(result)
+    return result
+
+
+def unsparsify(f):
+  magic = struct.unpack("I", f.read(4))[0]
+  assert(magic == 0xed26ff3a)
+
+  # Version
+  major = struct.unpack("H", f.read(2))[0]
+  minor = struct.unpack("H", f.read(2))[0]
+  assert(major == 1 and minor == 0)
+
+  # Header sizes
+  _ = struct.unpack("H", f.read(2))[0]
+  _ = struct.unpack("H", f.read(2))[0]
+
+  block_sz = struct.unpack("I", f.read(4))[0]
+  _ = struct.unpack("I", f.read(4))[0]
+  num_chunks = struct.unpack("I", f.read(4))[0]
+  _ = struct.unpack("I", f.read(4))[0]
+
+  for _ in range(num_chunks):
+    chunk_type = struct.unpack("H", f.read(2))[0]
+    _ = struct.unpack("H", f.read(2))[0]
+    out_blocks = struct.unpack("I", f.read(4))[0]
+    _ = struct.unpack("I", f.read(4))[0]
+
+    if chunk_type == 0xcac1:  # Raw
+      # TODO: yield in smaller chunks. Yielding only block_sz is too slow. Largest observed data chunk is 252 MB.
+      yield f.read(out_blocks * block_sz)
+    elif chunk_type == 0xcac2:  # Fill
+      filler = f.read(4) * (block_sz // 4)
+      for _ in range(out_blocks):
+        yield filler
+    elif chunk_type == 0xcac3:  # Don't care
+      yield b""
+    else:
+      raise Exception("Unhandled sparse chunk type")
+
+
+def flash_agnos_update(manifest_path, cloudlog, spinner=None):
+  update = json.load(open(manifest_path))
+
+  current_slot = subprocess.check_output(["abctl", "--boot_slot"], encoding='utf-8').strip()
+  target_slot = "_b" if current_slot == "_a" else "_a"
+  target_slot_number = "0" if target_slot == "_a" else "1"
+
+  cloudlog.info(f"Current slot {current_slot}, target slot {target_slot}")
+
+  # set target slot as unbootable
+  os.system(f"abctl --set_unbootable {target_slot_number}")
+
+  for partition in update:
+    cloudlog.info(f"Downloading and writing {partition['name']}")
+
+    downloader = StreamingDecompressor(partition['url'])
+    with open(f"/dev/disk/by-partlabel/{partition['name']}{target_slot}", 'wb') as out:
+      partition_size = partition['size']
+      # Clear hash before flashing
+      out.seek(partition_size)
+      out.write(b"\x00" * 64)
+      out.seek(0)
+      os.sync()
+
+      # Flash partition
+      if partition['sparse']:
+        raw_hash = hashlib.sha256()
+        for chunk in unsparsify(downloader):
+          raw_hash.update(chunk)
+          out.write(chunk)
+
+          if spinner is not None:
+            spinner.update_progress(out.tell(), partition_size)
+
+        if raw_hash.hexdigest().lower() != partition['hash_raw'].lower():
+          raise Exception(f"Unsparse hash mismatch '{raw_hash.hexdigest().lower()}'")
+      else:
+        while not downloader.eof:
+          out.write(downloader.read(1024 * 1024))
+
+          if spinner is not None:
+            spinner.update_progress(out.tell(), partition_size)
+
+      if downloader.sha256.hexdigest().lower() != partition['hash'].lower():
+        raise Exception("Uncompressed hash mismatch")
+
+      if out.tell() != partition['size']:
+        raise Exception("Uncompressed size mismatch")
+
+      # Write hash after successfull flash
+      os.sync()
+      out.write(partition['hash_raw'].lower().encode())
+
+  cloudlog.info(f"AGNOS ready on slot {target_slot}")
+
+
+if __name__ == "__main__":
+  import logging
+  import time
+  import sys
+
+  if len(sys.argv) != 2:
+    print("Usage: ./agnos.py <manifest.json>")
+    exit(1)
+
+  spinner = Spinner()
+  spinner.update("Updating AGNOS")
+  time.sleep(5)
+
+  logging.basicConfig(level=logging.INFO)
+  flash_agnos_update(sys.argv[1], logging, spinner)
diff --git a/selfdrive/hardware/tici/hardware.py b/selfdrive/hardware/tici/hardware.py
index 4c2e7178..29e7a96c 100644
--- a/selfdrive/hardware/tici/hardware.py
+++ b/selfdrive/hardware/tici/hardware.py
@@ -32,6 +32,10 @@ class Tici(HardwareBase):
     self.nm = self.bus.get_object(NM, '/org/freedesktop/NetworkManager')
     self.mm = self.bus.get_object(MM, '/org/freedesktop/ModemManager1')
 
+  def get_os_version(self):
+    with open("/VERSION") as f:
+      return f.read().strip()
+
   def get_sound_card_online(self):
     return True
 
diff --git a/selfdrive/updated.py b/selfdrive/updated.py
index d1eee4d3..1ddf3d78 100755
--- a/selfdrive/updated.py
+++ b/selfdrive/updated.py
@@ -36,14 +36,14 @@ from typing import List, Tuple, Optional
 
 from common.basedir import BASEDIR
 from common.params import Params
-from selfdrive.hardware import EON, TICI
+from selfdrive.hardware import EON, TICI, HARDWARE
 from selfdrive.swaglog import cloudlog
 from selfdrive.controls.lib.alertmanager import set_offroad_alert
+from selfdrive.hardware.tici.agnos import flash_agnos_update
 
 LOCK_FILE = os.getenv("UPDATER_LOCK_FILE", "/tmp/safe_staging_overlay.lock")
 STAGING_ROOT = os.getenv("UPDATER_STAGING_ROOT", "/data/safe_staging")
 
-NEOS_VERSION = os.getenv("UPDATER_NEOS_VERSION", "/VERSION")
 NEOSUPDATE_DIR = os.getenv("UPDATER_NEOSUPDATE_DIR", "/data/neoupdate")
 
 OVERLAY_UPPER = os.path.join(STAGING_ROOT, "upper")
@@ -214,10 +214,23 @@ def finalize_update() -> None:
   cloudlog.info("done finalizing overlay")
 
 
-def handle_neos_update(wait_helper: WaitTimeHelper) -> None:
-  with open(NEOS_VERSION, "r") as f:
-    cur_neos = f.read().strip()
+def handle_agnos_update(wait_helper):
+  cur_version = HARDWARE.get_os_version()
+  updated_version = run(["bash", "-c", r"unset AGNOS_VERSION && source launch_env.sh && \
+                          echo -n $AGNOS_VERSION"], OVERLAY_MERGED).strip()
 
+  cloudlog.info(f"AGNOS version check: {cur_version} vs {updated_version}")
+  if cur_version == updated_version:
+    return
+
+  cloudlog.info(f"Beginning background installation for AGNOS {updated_version}")
+
+  manifest_path = os.path.join(OVERLAY_MERGED, "installer/updater/update_agnos.json")
+  flash_agnos_update(manifest_path, cloudlog)
+
+
+def handle_neos_update(wait_helper: WaitTimeHelper) -> None:
+  cur_neos = HARDWARE.get_os_version()
   updated_neos = run(["bash", "-c", r"unset REQUIRED_NEOS_VERSION && source launch_env.sh && \
                        echo -n $REQUIRED_NEOS_VERSION"], OVERLAY_MERGED).strip()
 
@@ -294,6 +307,8 @@ def fetch_update(wait_helper: WaitTimeHelper) -> bool:
 
       if EON:
         handle_neos_update(wait_helper)
+      elif TICI:
+        handle_agnos_update(wait_helper)
 
     # Create the finalized, ready-to-swap update
     finalize_update()
@@ -392,5 +407,6 @@ def main():
 
   dismount_overlay()
 
+
 if __name__ == "__main__":
   main()