diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..f49a4e1
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diff --git a/README.md b/README.md
index c82d26b..6d5b756 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,35 @@
-# snap-openstack-network-agents
+# OpenStack Network Agents (snap)
+
+This snap provides the `neutron-ovn-metadata-agent` and helpers for Sunbeam
+**network-role** nodes. It is designed to be co-located with `microovn`.
+
+## Install
+
+```bash
+sudo snap install openstack-network-agents --classic
+```
+
+**NOTE:** Classic confinement is required to access `/var/run/openvswitch/db.sock`.
+
+## Configure
+
+The snap can configure the provider bridge and physnet mapping:
+
+```bash
+sudo snap set openstack-network-agents \
+  external-interface=enp6s0 \
+  bridge-name=br-ex \
+  physnet-name=physnet1
+```
+
+Then (re)start the agent:
+
+```bash
+sudo snap start openstack-network-agents.metadata-agent
+```
+
+## Service
+
+```bash
+sudo snap services openstack-network-agents
+```
diff --git a/snap/files/bin/bridge-setup b/snap/files/bin/bridge-setup
new file mode 100644
index 0000000..7fdf4f9
--- /dev/null
+++ b/snap/files/bin/bridge-setup
@@ -0,0 +1,113 @@
+#!/usr/bin/env bash
+set -euo pipefail
+log(){ echo "bridge-setup: $*" >&2; }
+die(){ echo "bridge-setup ERROR: $*" >&2; exit 1; }
+
+apply_from_snap_config() {
+  local iface bridge phys
+  iface="$(snapctl get network.interface || true)"
+  bridge="$(snapctl get network.bridge || true)"; : "${bridge:=br-ex}"
+  phys="$(snapctl get network.physnet || true)"; : "${phys:=physnet1}"
+  [[ -n "$iface" ]] || { log "no network.interface set; skipping"; exit 0; }
+  ensure_bridge_and_mapping "${bridge}" "${iface}" "${phys}"
+}
+
+ensure_bridge_and_mapping() {
+  local br="$1" ifc="$2" phys="$3"
+  local ovsctl=""
+  if [[ -x "${SNAP}/usr/bin/ovs-vsctl" ]]; then
+    ovsctl="${SNAP}/usr/bin/ovs-vsctl"
+  elif [[ -x /snap/microovn/current/usr/bin/ovs-vsctl ]]; then
+    ovsctl="/snap/microovn/current/usr/bin/ovs-vsctl"
+  fi
+  [[ -n "$ovsctl" ]] || die "ovs-vsctl not found; stage openvswitch-switch into the snap"
+
+  local dbopt=""
+  if [[ -S /var/snap/microovn/common/run/switch//db.sock ]]; then
+    dbopt="--db=unix:/var/snap/microovn/common/run/switch//db.sock"
+  elif [[ -S /var/run/openvswitch/db.sock ]]; then
+    dbopt="--db=unix:/var/run/openvswitch/db.sock"
+  fi
+
+  # Ovsctl wrapper that adds --db option if a socket is found
+  ovs() { "$ovsctl" ${dbopt:+$dbopt} "$@"; }
+
+  if [[ -n "$ovsctl" ]]; then
+    ovs --may-exist add-br "$br"
+    ovs --may-exist add-port "$br" "$ifc"
+    ip link set dev "$br" up || true
+    ip link set dev "$ifc" up || true
+    local current
+    current=$(ovs --if-exists get Open_vSwitch . external_ids:ovn-bridge-mappings 2>/dev/null | tr -d '"') || current=""
+    if [[ "$current" == *"$phys:$br"* ]]; then
+      log "mapping $phys:$br already present"
+    else
+      if [[ -n "$current" && "$current" != "[]" ]]; then
+        ovs set Open_vSwitch . external_ids:ovn-bridge-mappings="${current},${phys}:${br}"
+      else
+        ovs set Open_vSwitch . external_ids:ovn-bridge-mappings="${phys}:${br}"
+      fi
+      log "set mapping ${phys}:${br}"
+    fi
+
+    local mac cur_mac_map updated_mac_map replaced
+    mac="$(cat "/sys/class/net/${br}/address" 2>/dev/null || true)"
+    if [[ -z "$mac" ]]; then
+      mac="$(ip -o link show "$br" 2>/dev/null | awk -F'link/ether ' '{print $2}' | awk '{print $1}')"
+    fi
+    if [[ -n "$mac" && "$mac" != "00:00:00:00:00:00" ]]; then
+      cur_mac_map=$(ovs --if-exists get Open_vSwitch . external_ids:ovn-chassis-mac-mappings 2>/dev/null | tr -d '"' || true)
+      [[ "$cur_mac_map" == "[]" ]] && cur_mac_map=""
+
+      if [[ -z "$cur_mac_map" ]]; then
+        updated_mac_map="${phys}:${mac}"
+      else
+        IFS=',' read -r -a parts <<< "$cur_mac_map"
+        updated_mac_map=""
+        replaced=0
+        for ent in "${parts[@]}"; do
+          [[ -z "$ent" ]] && continue
+          if [[ "$ent" == "$phys:"* ]]; then
+            ent="${phys}:${mac}"
+            replaced=1
+          fi
+          updated_mac_map="${updated_mac_map:+$updated_mac_map,}${ent}"
+        done
+        if [[ "$replaced" -eq 0 ]]; then
+          updated_mac_map="${updated_mac_map:+$updated_mac_map,}${phys}:${mac}"
+        fi
+      fi
+      ovs set Open_vSwitch . external_ids:ovn-chassis-mac-mappings="${updated_mac_map}"
+      log "set chassis-mac mapping ${phys}:${mac}"
+    else
+      log "could not determine MAC for ${ifc}; skipping chassis-mac mapping"
+    fi
+
+    local gw cms newcms
+    gw="$(snapctl get network.enable-chassis-as-gw || true)"
+    if [[ "${gw,,}" == "true" ]]; then
+      cms="$(ovs --if-exists get Open_vSwitch . external_ids:ovn-cms-options 2>/dev/null | tr -d '"' || true)"
+      [[ "$cms" == "[]" ]] && cms=""
+      if [[ "$cms" != *"enable-chassis-as-gw"* ]]; then
+        newcms="${cms:+$cms,}enable-chassis-as-gw"
+        ovs set Open_vSwitch . external_ids:ovn-cms-options="${newcms}"
+        log "enabled gateway role (ovn-cms-options=${newcms})"
+      else
+        log "gateway role already enabled (ovn-cms-options=${cms})"
+      fi
+    fi
+
+  else
+    ip link show "$br" >/dev/null 2>&1 || ip link add "$br" type bridge
+    ip link set "$ifc" down || true
+    ip link set "$ifc" master "$br" || true
+    ip link set "$br" up
+    ip link set "$ifc" up
+  fi
+}
+
+case "${1:-}" in
+  apply-from-snap-config) apply_from_snap_config ;;
+  ensure)                 ensure_bridge_and_mapping "${2:?br}" "${3:?iface}" "${4:?physnet}" ;;
+  *) echo "Usage: bridge-setup apply-from-snap-config | ensure <br> <iface> <physnet>" >&2; exit 2 ;;
+esac
diff --git a/snap/hooks/configure b/snap/hooks/configure
new file mode 100644
index 0000000..83029c6
--- /dev/null
+++ b/snap/hooks/configure
@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+"$SNAP"/files/bin/bridge-setup apply-from-snap-config || exit 0
diff --git a/snap/hooks/install b/snap/hooks/install
new file mode 100644
index 0000000..6ec04a6
--- /dev/null
+++ b/snap/hooks/install
@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if snapctl get external-interface >/dev/null 2>&1; then
+  "$SNAP"/files/bin/bridge-setup apply-from-snap-config || true
+fi
diff --git a/snap/snapcraft.yaml b/snap/snapcraft.yaml
new file mode 100644
index 0000000..d1b299c
--- /dev/null
+++ b/snap/snapcraft.yaml
@@ -0,0 +1,47 @@
+name: openstack-network-agents
+summary: OVS provider-bridge helper for OpenStack Network role
+description: |
+  Provides a helper to configure a provider bridge and OVN physnet mapping.
+  This snap is meant to be driven by a subordinate charm and does not ship
+  neutron-ovn-metadata-agent.
+base: core24
+version: "0.1"
+license: Apache-2.0
+grade: devel
+confinement: strict
+
+plugs:
+  network-control:
+    interface: network-control
+  network:
+    interface: network
+  ovn-chassis:
+    interface: content
+    target: $SNAP_DATA/microovn/chassis
+
+apps:
+  bridge-setup:
+    command: files/bin/bridge-setup
+    plugs:
+      - network
+      - network-control
+      - ovn-chassis
+
+parts:
+  agents:
+    plugin: dump
+    source: .
+    stage-packages:
+      - iproute2
+      - openvswitch-switch
+    override-build: |
+      set -euxo pipefail
+      craftctl default
+      install -D -m755 "$CRAFT_PROJECT_DIR/snap/files/bin/bridge-setup" \
+                       "$CRAFT_PART_INSTALL/files/bin/bridge-setup"
+
+hooks:
+  install:
+    plugs: [network, network-control, ovn-chassis]
+  configure:
+    plugs: [network, network-control, ovn-chassis]